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In which aspects does the door and window frame do the waterproof and weatherproof sealing of the structure itself (2)?

Update:24-03-2022
Summary:

(3) Silicone glue Although seam glue and corner glue we […]

(3) Silicone glue
Although seam glue and corner glue were used in the corner grouping, it was still found in the project that due to the exposed position of the aluminum group corners, during long-term use, rainwater entered the profile cavity along the wall gap through the corner knife edge, causing the doors and windows to corrode. Affects the quality of the group corners. In order to prevent problems before they happen and to increase the aesthetics, it is necessary to apply a transparent neutral silicone sealant to the incision part of the corners after the corners are formed. In addition, the cavity of the group angle steel sheet and the position of the stile interface after the installation of the stile also needs to be covered with transparent glue. It is required that the glue is full and the gaps are filled. The outer corners of the knife edge should be filled with glue and flush with the profile, and the excess glue should be wiped off.

In addition, apply black sealant or transparent sealant (except for the stile position) on the two corners of the lower side of the frame of the opening part of the door and window, see. The glue should be uniform and beautiful, and the gaps should be filled effectively. It must not only improve the sealing and aesthetics of doors and windows, but also reduce the amount of glue. It is strictly forbidden to use waste glue and useless glue.
Install the water-stop sheet at the connection between the middle stile with the opening fan and the frame, and inject silicone sealant at the glue injection hole. Stop the glue injection when the base of the water-stop sheet overflows to ensure that the silicone glue is full of the water-stop sheet. cavity. Clean up spilled silicone in time to keep the surface clean. The main purpose of gluing the middle stile is to let the rainwater entering the inner cavity of the door and window profiles be discharged in the respective door and window units, so as to avoid the flow between the units, and it is not easy to check the water leakage points.

Before installing the duckbill adhesive strip and fixing the waterproof adhesive strip, it is necessary to continuously apply black neutral silicone sealant to the gap between the aluminum and wood of the lower frame of the inward window and the left and right vertical edges (the inner buckle is 100mm to 150mm upwards). , to ensure that after the duckbill rubber strip and the fixed waterproof rubber strip are installed, the sealant can be filled with full and no gaps. The adhesive strip must be installed as soon as possible after the glue is applied to prevent the sealant from curing and the adhesive strip cannot be installed. The main purpose of gluing here is to prevent the rainwater entering the stagnant water cavity from entering the indoor cavity through the gap of the rubber strip slot. Generally, after the rainwater enters the indoor cavity, it can cause water leakage of the doors and windows. It can be said that the duckbill strip and the fixed waterproof strip are the doors and windows. Leaky critical seal.

The glue strip installation channel is glued intermittently, and the glue is prevented from sticking to the decorative surface of the profile when bonding the glue strip.
A large number of water tightness experiments have confirmed that the main reason for the leakage of doors and windows is that the rainwater enters the indoor side from the outdoor side water cavity through the rubber strip base under the action of wind pressure, resulting in water leakage. The base of the duckbill rubber strip and the base of the fixed frame are installed with the waterproof rubber strip (the place where the drain hole is fixed by the light mill) and black silicone sealant is applied. Apply U-shaped glue and return 150mm to the left and right.

In order to prevent rainwater from flowing into the window through the gap between the aluminum and wood from the upper opening of the wood-aluminum composite door and window, it is necessary to apply glue on the upper and lower openings of the doors and windows by 150mm. In addition, due to the large gap between the aluminum-clad wood frame aluminum and the frame wood, in order to save glue, it can be filled with a foam stick before gluing, and then sealed with a neutral silicone sealant.

If the outside of the glass needs to be glued, first of all, ensure the compatibility of the silicone sealant with the outer glass strip to prevent the discoloration of the sealant and cause unnecessary losses. The requirements for gluing here are relatively strict, requiring continuous and uninterrupted gluing, beautiful, flat, defect-free, uniform filling, and smooth corners without edges and corners. During the gluing process, violent impact should be avoided to prevent the glue gun and glass from squeezing the colloid to cause deformation. Once the sealant is finished, it is difficult to repair, so it is necessary to improve the operating skills of workers. If necessary, a rubber squeegee can be used for glue.

(4) Special adhesive for rubber strips
The corner position of the rubber strip is cut at a 45° angle, the bottom of the rubber strip is reserved for 1mm to 2mm connection, and the incision position is bonded with glue. 502 glue is easy to have adverse reactions with the tape, poor bonding performance, brittle, hard, easy to tear after bonding, not recommended. Adhesives that meet the requirements of use can be found through experimental comparison.

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