1. The utility model provides a peripheral waterproof construction of window steel subframe which characterized in that: including window basis (1) and steel subframe (2), steel subframe (2) fixed mounting is on window basis (1), be provided with polyurethane foam gap filler layer (3) between steel subframe (2) and window basis (1), be stained with on outdoor face (21) of steel subframe (2) and adhere and be fixed with first adhesive linkage (211), be stained with on window basis (1) of steel subframe (2) one side outdoors and adhere and be fixed with second adhesive linkage (11), one side outdoor of steel subframe (2) orientation is provided with polyurethane waterproof coating layer (4), polyurethane waterproof coating layer (4) are fixed between steel subframe (2) and window basis (1) through first adhesive linkage (211) and second adhesive linkage (11), window frame (8) fixed mounting is on steel subframe (2).

2. The window steel subframe periphery waterproofing structure according to claim 1, wherein: an isolation layer (5) is arranged between the polyurethane foam joint mixture layer (3) and the polyurethane waterproof coating layer (4).

3. The window steel subframe periphery waterproofing structure according to claim 1, wherein: a particle layer (6) is embedded on the surface, deviating from the window foundation (1), of the polyurethane waterproof coating layer (4) at the position corresponding to the window foundation (1).

4. The window steel subframe periphery waterproofing structure according to claim 1, wherein: and a reinforcing layer (41) is arranged in the polyurethane waterproof coating layer (4).

5. The window steel subframe periphery waterproofing structure according to claim 1, wherein: the first adhesive layer (211) extends towards the inner peripheral surface direction of the steel auxiliary frame (2) and is attached to the inner peripheral surface of the steel auxiliary frame (2) after being bent towards the indoor direction, the polyurethane waterproof coating layer (4) extends towards the inner peripheral surface direction of the steel auxiliary frame (2) and is attached and fixed to the first adhesive layer (211) after being bent towards the indoor direction, one side, facing the window frame (8), of the polyurethane waterproof coating layer (4) is located between the window frame (8) and the steel auxiliary frame (2), and a sealing adhesive layer (7) is arranged between the window frame (8) and the polyurethane waterproof coating layer (4).

6. The construction method of the peripheral waterproof structure of the steel subframe of the window according to any one of claims 1 to 5, wherein: the method comprises the following steps:

s1, fixedly installing the steel auxiliary frame (2) to the window foundation (1), and filling polyurethane foam gap filler between the steel auxiliary frame (2) and the window foundation (1) to form a polyurethane foam gap filler layer (3);

s2, smearing a first adhesive layer (211) on the outdoor surface (21) of the steel subframe (2), and smearing a second adhesive layer (11) on the window base (1) of the steel subframe (2) facing the outdoor side;

s3, coating a polyurethane waterproof coating on the outdoor sides of the first adhesive layer (211), the second adhesive layer (11) and the polyurethane foam gap filler layer (3) to form a polyurethane waterproof coating layer (4);

s4, and performing subsequent construction of the window frame (8), plastering, pasting heat-insulating materials and other processes.

7. The construction method of the window steel subframe periphery waterproof structure according to claim 6, wherein: in the step S3, after the first adhesive layer (211) and the second adhesive layer (11) are completely laid, before the polyurethane waterproof coating layer (4) is laid, the isolation layer (5) is arranged at the position of the polyurethane foam caulking agent between the first adhesive layer (211) and the second adhesive layer (11).

8. The construction method of the window steel subframe periphery waterproof structure according to claim 6, wherein: in the step S3, a reinforcing layer (41) is embedded in the polyurethane waterproof coating layer (4) in the process of laying the polyurethane waterproof coating layer (4).

9. The construction method of the window steel subframe periphery waterproof structure according to claim 6, wherein: and in the step S3, before the polyurethane waterproof coating layer (4) is completely paved and the polyurethane waterproof coating layer (4) is not completely cured, paving the particle layer (6) on the side, deviating from the window foundation (1), of the polyurethane waterproof coating layer (4).

10. The construction method of the window steel subframe periphery waterproof structure according to claim 6, wherein: in the step S2, in the process of laying the first adhesive layer (211), after the first adhesive layer (211) extends towards the inner side surface of the steel subframe (2) and is bent towards the indoor direction, the first adhesive layer (211) is attached to the inner side surface of the steel subframe (2); in the step S3, after the polyurethane waterproof coating layer (4) extends in the direction of the inner side surface of the steel subframe (2) and is bent in the indoor direction in the process of laying the polyurethane waterproof coating layer (4), the polyurethane waterproof coating layer (4) is fixed on the inner side surface of the steel subframe (2) through the first adhesive layer (211); in the step S4, the window frame (8) is fixedly arranged on the steel auxiliary frame (2), and then a sealing adhesive layer (7) is coated between the window frame (8) and the polyurethane waterproof coating layer (4).

Background

In the newly-covered building, because the size of the door and window opening of the building house is not very standard, the steel auxiliary frame can be installed at the position of the door and window opening, and the machining size of the door and window can be accurately measured after the steel auxiliary frame is installed. The steel auxiliary frame plays a fixed length and positioning role for the door and the window. Generally, large projects require the installation of steel subframes, which are more standard.

After the steel subframe is installed, the worker needs to perform waterproof construction between the steel subframe and the window foundation 1. Referring to fig. 1, for a waterproof construction between vice frame of steel 2 and window basis 1 among the correlation technique, including window basis 1, the rigid coupling has vice frame of steel 2 in the window basis 1, it has polyurethane foam gap filler layer 3 to fill between vice frame of steel 2 and the window basis 1, vice frame of steel 2 is provided with waterproofing membrane 9 towards outdoor one side simultaneously, waterproofing membrane 9 generally chooses for use tubeless self-adhesion waterproofing membrane, waterproofing membrane 9 is attached in proper order at vice frame of steel 2 towards the outer 1 inner wall of window basis of one side, vice frame of steel 2 towards outdoor one side and the inner wall of vice frame of steel 2. The waterproof coiled material 9 and the polyurethane foam joint mixture layer 3 form waterproof sealing between the steel subframe 2 and the window foundation 1. The subsequent staff can mount the window on the steel subframe 2 and fill the polyurethane foam gap filler layer 3 between the window foundation 1 and the waterproofing membrane 9.

Aiming at the related technologies, the inventor finds that in the subsequent construction process, the bonding effect of the waterproof coiled material 9, the steel subframe 2 and the window foundation 1 is limited by objective conditions such as air temperature, the firmness degree of a base layer, the flatness of the base layer and the like, the holding adhesive capacity of the flexible pressure-sensitive adhesive of the waterproof coiled material 9 is very weak and the stress is obviously relaxed after the construction is finished, and the waterproof coiled material 9 is often stripped after external force is applied, namely in the subsequent construction links of a plastering layer and a heat insulation layer, the waterproof coiled material 9 is easy to strip, so that the waterproof performance of a window is influenced, and the periphery of a window frame 8 is easy to be insulated, and the stability and the safety of a decoration system are also influenced to a certain degree.

Disclosure of Invention

In order to improve the mode ratio that carries out water repellent between steel subframe and the window opening through waterproofing membrane among the correlation technique and lead to subsequent heat preservation, the unstable problem of decoration system easily, the application provides a peripheral waterproof construction of window steel subframe and construction method thereof.

One of the purpose of this application is the peripheral waterproof construction of a window steel subframe that provides, adopts following technical scheme:

the utility model provides a peripheral waterproof construction of vice frame of window steel, including window basis and the vice frame of steel, the vice frame fixed mounting of steel is on the window basis, be provided with polyurethane foam gap filler layer between the vice frame of steel and the window basis, it is fixed with first adhesive linkage to be stained with on the outdoor face of the vice frame of steel, it is fixed with the second adhesive linkage to be stained with on the window basis of the vice frame of steel orientation outdoor one side, the vice frame of steel is provided with the polyurethane waterproof coating layer towards outdoor one side, the polyurethane waterproof coating layer is fixed between vice frame of steel and window basis through first adhesive linkage and second adhesive linkage, window frame fixed mounting is on the vice frame of steel.

By adopting the technical scheme, the waterproof coiled material and the polymer cement waterproof coating are replaced by the polyurethane waterproof coating, the polyurethane waterproof coating is in a rubber elastic state after being cured, and the polyurethane waterproof coating has better physical and mechanical properties and better fatigue resistance compared with the waterproof coiled material and the polymer cement (JS) waterproof coating. And the polyurethane waterproof coating layer realizes better bonding effect with the steel auxiliary frame and the window foundation through the first bonding layer and the second bonding layer, and compared with a self-adhesive waterproof coiled material, the bonding force has better durability and no looseness, so that the polyurethane waterproof coating layer is more stable in the subsequent construction process of heat preservation and decoration systems around the window frame.

Optionally, an isolation layer is arranged between the polyurethane foam joint mixture layer and the polyurethane waterproof coating layer.

Through adopting above-mentioned technical scheme, the setting up of isolation layer makes polyurethane waterproof coating layer can give full play to the characteristics that polyurethane coating intensity is high and the percentage elongation is big when dynamic deformation, can effectively avoid the risk of the stress concentration destruction that the two combine to produce.

Optionally, a particle layer is embedded on the surface of the polyurethane waterproof coating layer at the position corresponding to the window foundation, which deviates from the window foundation.

By adopting the technical scheme, the arrangement of the particle layer enables the plastering mortar and the heat-insulating binder to be more firmly fixed with the polyurethane waterproof coating layer in the subsequent construction process.

Optionally, an enhancement layer is arranged in the polyurethane waterproof coating layer.

By adopting the technical scheme, the reinforcing layer can enable the integrity of the polyurethane waterproof coating layer to be better, so that the polyurethane waterproof coating layer is more stable in the subsequent process of construction on the surface of the polyurethane coating layer.

Optionally, the first adhesive layer extends towards the inner circumferential surface of the steel subframe and bends towards the indoor direction and then is attached to the inner circumferential surface of the steel subframe, the polyurethane waterproof coating layer extends towards the inner circumferential surface of the steel subframe and bends towards the indoor direction and then is attached and fixed to the first adhesive layer, one side of the polyurethane waterproof coating layer facing the window frame is located between the window frame and the steel subframe, and a sealing adhesive layer is arranged between the window frame and the polyurethane waterproof coating layer.

By adopting the technical scheme, the stability between the window frame and the steel auxiliary frame is better after the construction of the subsequent window frame is finished.

The invention also aims to provide a construction method of the peripheral waterproof structure of the window steel subframe, which is characterized by comprising the following steps of:

s1, fixedly installing the steel auxiliary frame to the window foundation, and filling polyurethane foam gap filler between the steel auxiliary frame and the window foundation to form a polyurethane foam gap filler layer;

s2, coating a first adhesive layer on the outdoor surface of the steel subframe, and coating a second adhesive layer on the window base of the steel subframe facing the outdoor side;

s3, coating polyurethane waterproof paint on the outdoor sides of the first adhesive layer, the second adhesive layer and the polyurethane foam joint mixture layer to form a polyurethane waterproof paint layer;

s4, construction of subsequent procedures of window frames, plastering, heat insulation material pasting and the like.

By adopting the technical scheme, the polyurethane waterproof coating layer is in a rubber elastic state after being cured, and has better physical and mechanical properties and better fatigue resistance compared with a waterproof coiled material and a polymer cement (JS) waterproof coating. And the polyurethane waterproof coating layer realizes better bonding effect with the steel auxiliary frame and the window foundation through the first bonding layer and the second bonding layer, and compared with a self-adhesive waterproof coiled material, the bonding force has better durability and no looseness, so that the polyurethane waterproof coating layer is more stable in the subsequent construction process of heat preservation and decoration systems around the window frame.

Optionally, in step S3, after the first adhesive layer and the second adhesive layer are completely laid, before the waterproof polyurethane paint layer is laid, an isolation layer is disposed at a position of the polyurethane foam caulking agent between the first adhesive layer and the second adhesive layer.

Through adopting above-mentioned technical scheme, the setting up of isolation layer makes polyurethane waterproof coating layer can give full play to the characteristics that polyurethane coating intensity is high and the percentage elongation is big when dynamic deformation, can effectively avoid the risk of the stress concentration destruction that the two combine to produce.

Optionally, in the step S3, in the process of laying the polyurethane waterproof coating layer, a reinforcing layer is embedded in the polyurethane waterproof coating layer.

By adopting the technical scheme, the setting of the enhancement layer effectively improves the integrity of the polyurethane waterproof coating layer, and the situation that the polyurethane waterproof coating layer is broken after subsequent stress is avoided as much as possible.

Optionally, in step S3, before the polyurethane waterproof coating layer is completely laid and the polyurethane waterproof coating layer is not completely cured, a granular layer is laid on a side of the polyurethane waterproof coating layer away from the window foundation.

Through adopting above-mentioned technical scheme, setting up of grained layer can effectual improvement follow-up construction in-process plastering mortar and the bonding stability on polyurethane waterproof coating layer such as heat preservation binder.

Optionally, in the step S2, after the first adhesive layer extends toward the inner side of the steel subframe and is bent toward the indoor direction during the laying process, the first adhesive layer is attached to the inner side of the steel subframe; in the step S3, in the process of laying the polyurethane waterproof coating layer, after the polyurethane waterproof coating layer extends towards the inner side surface of the steel subframe and is bent towards the indoor direction, the polyurethane waterproof coating layer is fixed on the inner side surface of the steel subframe through the first bonding layer; and in the step S4, after the window frame is fixedly arranged on the steel auxiliary frame, a sealing adhesive layer is smeared between the window frame and the polyurethane waterproof coating layer.

By adopting the technical scheme, the sealing and waterproof performance between the window frame and the steel auxiliary frame is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through set up polyurethane waterproof coating layer between steel subframe and window foundation, polyurethane waterproof coating layer is fixed between steel subframe and window foundation through first adhesive linkage and second adhesive linkage, and polyurethane waterproof coating layer is the rubber elasticity state after the solidification, and polyurethane waterproof coating layer has better fatigue resistance ability. The polyurethane waterproof coating layer achieves a better bonding effect with the steel auxiliary frame and the window foundation through the first bonding layer and the second bonding layer, and compared with a self-adhesive waterproof coiled material, the bonding force has better durability and no looseness, so that the polyurethane waterproof coating layer is more stable in the subsequent construction process of heat preservation and decoration system around the window frame;

2. the isolation layer is arranged between the polyurethane waterproof coating layer and the polyurethane foam joint mixture layer, so that the polyurethane waterproof coating layer can fully exert the characteristics of high strength and high elongation of the polyurethane coating during dynamic deformation, and the risk of stress concentration damage caused by the combination of the polyurethane waterproof coating layer and the polyurethane foam joint mixture layer can be effectively avoided;

3. through set up the enhancement layer in polyurethane waterproof coating layer, make polyurethane waterproof coating layer more stable, set up the grained layer simultaneously on polyurethane waterproof coating layer for subsequent plastering can be better with the fixed effect between insulation material layer and the polyurethane waterproof coating layer.

Drawings

Fig. 1 is a schematic view of a waterproof structure of the periphery of a steel subframe in the related art.

Fig. 2 is a schematic structural outline view of a waterproof structure in an embodiment of the present application.

Fig. 3 is a partially enlarged schematic view of a sectional view of a waterproof structure in an embodiment of the present application.

Fig. 4 is a partially enlarged schematic view of a portion a in fig. 3.

Fig. 5 is a construction flowchart of the waterproof structure in the embodiment of the present application.

Description of reference numerals: 1. a window foundation; 11. a second adhesive layer; 2. a steel subframe; 21. outside the room; 211. a first adhesive layer; 3. a polyurethane foam underfill layer; 4. a polyurethane waterproof coating layer; 41. an enhancement layer; 5. an isolation layer; 6. a particulate layer; 7. sealing the adhesive layer; 8. a window frame; 9. a waterproof roll.

Detailed Description

The present application is described in further detail below with reference to figures 2-5.

The embodiment of the application discloses peripheral waterproof construction of window steel subframe. Referring to fig. 2 and 3, the waterproof structure includes a window foundation 1 and a steel subframe 2, the steel subframe 2 is made of a hollow square tube, the steel subframe 2 is fixedly installed on the window foundation 1, a polyurethane foam gap filler layer 3 is arranged between the steel subframe 2 and the window foundation 1, and the polyurethane foam gap filler layer 3 is filled with polyurethane foam gap filler in the embodiment.

Referring to fig. 4, the surface of the steel subframe 2 facing the outdoor is an outdoor surface 21 of the steel subframe 2, a first adhesive layer 211 is arranged on the outdoor surface 21, a second adhesive layer 11 is arranged on the window foundation 1 on the side of the steel subframe 2 where the outdoor surface 21 is located, in this embodiment, the first adhesive layer 211 and the second adhesive layer 11 both use epoxy resin layers, and the first adhesive layer 211 and the second adhesive layer 11 both use water-based epoxy resin layers, solvent-based epoxy resin layers, and the like, and in this embodiment, the first adhesive layer 211 and the second adhesive layer 11 use water-based epoxy resin layers.

A polyurethane waterproof coating layer 4 is arranged on one side, facing outdoors, of the steel subframe 2, the thickness of the polyurethane waterproof coating layer 4 is 0.8-2.5mm, the polyurethane waterproof coating layer 4 is fixedly attached to a window foundation 1 on one side, where an outdoor surface 21 of the steel subframe 2 and the outdoor surface 21 of the steel subframe 2 are located, through a first bonding layer 211 and a second bonding layer 11, in the embodiment, the polyurethane waterproof coating layer 4 can be an oil polyurethane waterproof coating layer 4, a water-based polyurethane waterproof coating layer 4 and the like, and the polyurethane waterproof coating layer 4 is the water-based polyurethane waterproof coating layer 4 in the embodiment of the application; the window frame 8 is fixedly mounted on the inner peripheral surface of the steel subframe 2.

Polyurethane waterproof coating layer 4 is the rubber elasticity state after the solidification, and polyurethane waterproof coating layer 4 compares with waterproofing membrane and polymer cement (JS) waterproof coating and has better physical and mechanical properties to and better fatigue resistance, can also improve regional application scope in south and north when having guaranteed the water-proof effects persistence. And polyurethane waterproof coating 4 has realized through first adhesive linkage 211 and second adhesive linkage 11 with better bonding effect between steel subframe 2 and the window basis 1, and this kind of adhesion has better persistence and does not have laxity in comparison with self-adhesion waterproofing membrane for polyurethane waterproof coating 4 keeps warm, more stable in the decoration system work progress around follow-up window frame 8.

In order to make the polyurethane waterproof coating layer 4 fully exert the characteristics of high strength and high elongation of the polyurethane coating during dynamic deformation, the risk of stress concentration damage caused by the combination of the polyurethane coating and the polyurethane waterproof coating can be effectively avoided. Be provided with between polyurethane waterproof coating layer 4 and polyurethane foam caulking agent layer 3 and be used for carrying out spaced isolation layer 5 to polyurethane foam caulking agent layer 3 and polyurethane waterproof coating layer 4, isolation layer 5 can select for use beautiful line paper or ordinary white paper etc. isolation layer 5 selects for use beautiful line paper in this application embodiment. The two sides of the isolation layer 5 are respectively attached and fixed with the polyurethane foam gap filler layer 3 and the polyurethane waterproof coating layer 4, and the isolation layer 5 is positioned between the first bonding layer 211 and the second bonding layer 11.

Window basis 1 corresponds polyurethane waterproof coating layer 4 of position and deviates from 1 surface of window basis and inlays and be equipped with grained layer 6, grained layer 6 can select for use the grit, particulate matter such as plastic granules, grained layer 6 is the gravel layer in this embodiment, grained layer 6 paints the back that finishes at polyurethane waterproof coating layer, and just sprinkle on polyurethane waterproof coating layer 4 by the staff before polyurethane waterproof coating layer does not solidify completely, treat polyurethane waterproof coating layer 4 and solidify the back, grained layer 6 is just fixed on polyurethane waterproof coating layer 4.

The granular layer 6 is arranged, so that plastering mortar and a heat-insulating adhesive can be more firmly fixed with the polyurethane waterproof coating layer 4 in the subsequent construction process, and the tensile strength of a system among concrete, an epoxy resin coating layer, a polyurethane coating layer, the granular layer 6 and plastering (or heat insulation) is more than or equal to 0.4 MPa.

Further, a reinforcing layer 41 is arranged in the polyurethane waterproof coating layer 4, the reinforcing layer 41 can be selected from stitch-bonded polyester cloth, non-woven fabric, glass fiber and the like, in the embodiment of the application, the reinforcing layer 41 is selected from stitch-bonded polyester cloth, and the gram weight of the stitch-bonded polyester cloth is between 30 g/square meter and 120 g/square meter. The reinforcing layer 41 is arranged to make the integrity of the polyurethane waterproof coating layer 4 better and more resistant to damage.

Furthermore, first adhesive linkage 211 extends to the inner peripheral surface direction of steel subframe 2 and is attached on the inner peripheral surface of steel subframe 2 after buckling 30mm to indoor direction, polyurethane waterproof coating 4 extends to the inner peripheral surface direction of steel subframe 2 and is attached after buckling 30mm to indoor direction and fix on first adhesive linkage 211, so polyurethane waterproof coating 4 is located between window frame 8 and the steel subframe 2 towards one side of window frame 8, be provided with sealant layer 7 between window frame 8 towards outdoor one side and polyurethane waterproof coating 4, sealant layer 7 chooses for use weather resistant silicone sealant layer 7 in this embodiment.

The implementation principle of the peripheral waterproof construction of window steel subframe of the embodiment of this application is: polyurethane waterproof coating layer 4 and polyurethane foam gap filler layer 3 form better seal structure to between steel subframe 2 and the window basis 1, and polyurethane waterproof coating layer 4 has better rubber elasticity for polyurethane waterproof coating layer 4 has better physical mechanical properties, and better fatigue resistance, can also improve the regional application scope in south and north when having guaranteed the water-proof effects persistence. And polyurethane waterproof coating 4 has realized through first adhesive linkage 211 and second adhesive linkage 11 with better bonding effect between steel subframe 2 and the window basis 1, and this kind of adhesion has better persistence and does not have laxity in comparison with self-adhesion waterproofing membrane for polyurethane waterproof coating 4 keeps warm, more stable in the decoration system work progress around follow-up window frame 8.

A construction method of a peripheral waterproof structure of a window steel subframe comprises the following steps:

s1, fixedly installing the steel subframe 2 to the window foundation 1 by workers, and filling a gap between the steel subframe 2 and the window foundation 1 with polyurethane foam gap filler;

after the polyurethane foam gap filler is filled, the expansion and the shaping of the polyurethane foam gap filler need to be waited, and after the expansion and the shaping of the polyurethane foam gap filler, workers cut the polyurethane foam gap filler which exceeds the side wall part of the steel auxiliary frame 2 by using a wallpaper knife.

S2, smearing a first adhesive layer 211 on the outdoor surface 21 of the steel subframe 2, and smearing a second adhesive layer 11 on the window foundation 1 on the outdoor side of the steel subframe 2;

before the first adhesive layer 211 and the second adhesive layer 11 are constructed, firstly, the surface of the steel subframe 2 and the window foundation 1 need to be cleaned to ensure the fixing effect of the first adhesive layer 211 and the second adhesive layer 11, then the first adhesive layer 211 is coated outside 21 of the steel subframe 2, the second adhesive layer 11 is coated on the window foundation 1, and the first adhesive layer 211 extends towards the direction of the inner side surface of the steel subframe 2 and is bent towards the indoor direction by 30mm and then is attached to the inner side surface of the steel subframe 2 in the coating process; the second adhesive layer 11 extends for 70mm from the outdoor surface 21 of the steel auxiliary frame 2 to the outdoor direction and then is attached to the window base 1;

s3, coating polyurethane waterproof paint on the outdoor surfaces of the first adhesive layer 211, the second adhesive layer 11 and the polyurethane foam gap filler layer 3 to form a polyurethane waterproof paint layer 4;

before the polyurethane waterproof coating layer 4 is constructed, an isolation layer 5 needs to be laid on the polyurethane foam gap filler layer 3 between the dried first bonding layer 211 and the dried second bonding layer 11; the isolation layer 5 is made of textured paper with the width slightly wider than that of the polyurethane foam gap filler layer 3. In the process of brushing the polyurethane waterproof coating layer 4, not less than three times of brushing are ensured, the thickness of the polyurethane waterproof coating layer 4 is in the range of 0.8mm-2.5mm, the reinforcing layer 41 is immediately paved after the second time of brushing the polyurethane waterproof coating, and then the polyurethane waterproof coating is continuously brushed, so that the reinforcing layer 41 is finally and completely covered and shielded; after the last polyurethane waterproof coating layer 44 is coated, before the polyurethane waterproof coating layer 44 is not completely cured, a layer of gravel is uniformly scattered on the side, deviating from the window foundation 11, of the polyurethane waterproof coating layer 44 at the position corresponding to the window foundation 11 by means of the viscosity of the polyurethane waterproof coating, so that a completely rough surface is formed on the side, deviating from the window foundation 11, of the polyurethane waterproof coating layer 44 at the position corresponding to the window foundation 11.

S4, construction of subsequent procedures of window frame 8, plastering, heat insulation material pasting and the like.

After the window frame 8 is installed on the steel auxiliary frame 2, a sealing adhesive layer 7 is smeared between the window frame 8 and the polyurethane waterproof coating layer 4.

The application principle of the construction method of the window steel subframe periphery waterproof structure is as follows: a polyurethane foam gap filler layer 3 is filled between the steel subframe 2 and the window foundation 1, meanwhile, an epoxy resin coating is used for fixing a polyurethane waterproof coating layer 4 between one outdoor side of the steel subframe 2 and the window foundation 1, and the polyurethane waterproof coating layer 4 and the polyurethane foam gap filler layer 3 enable a good waterproof structure to be formed between the steel subframe 2 and the window foundation 1. Meanwhile, the polyurethane waterproof coating layer 4 has good rubber elasticity, so that the polyurethane waterproof coating layer 4 has good physical mechanical properties and good fatigue resistance, and the application range of the south and north areas can be enlarged while the durability of the waterproof effect is ensured. And polyurethane waterproof coating 4 has realized through first adhesive linkage 211 and second adhesive linkage 11 with better bonding effect between steel subframe 2 and the window basis 1, and this kind of adhesion has better persistence and does not have laxity in comparison with self-adhesion waterproofing membrane for polyurethane waterproof coating 4 keeps warm, more stable in the decoration system work progress around follow-up window frame 8.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.