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How to ensure waterproof quality and prevent water seepage in the installation of external wall windows?
external wall

Cause analysis of external window leakage;

1. 1

The quality of the raw materials themselves.

1) Causes of window frames and sashes

difference in temperature

Severe deformation, irregular product,

intensity

Not enough,

Maomaojiao

tolerate

Greater than 3

Well, and

mouth of a cave

Excessive fit clearance will lead to leakage.

2) After the window frame is installed, due to the hole.

around

erase from

mortar

and

wall

origin

basis

Leveling blanket

Can't be permanently combined, and besides,

aluminium alloy window

about

heat expansion

and

low temperature

contraction coefficient

It is relatively large, and it will crack, fall off and leak water soon after use.

3) Open the sash repeatedly, so that the window frame is subjected to push-pull vibration.

surrounding region

High elastic sealing material is not used, and plastering mortar is separated from the original mortar surface after installation.

crack

Thereby causing leakage n.

4) The quality of the sliding window sealing strip is poor, and it is deformed and failed prematurely under the action of temperature difference, so it cannot be stopped.

Rain Water

Infiltration, leading to leakage.

5) Part of the outer window cover

windowsill

external wall

Tapestry brick

The joint cracked, causing rain to run down the tiny gap.

crack

pervade

inside/inner wall

Nearby.

6) The periphery of the outer window frame is not waterproof and sealed, and only low grade is used.

glass cement

Make it watertight

, glass glue premature failure, in

wind force action

Rain on the windowsill

outer flank

Infiltrate into the crowd

inside

1.2

Design, construction and management reasons.

1) The waterproof design of external windows should be based on the principle of "drainage as the premise, waterproof as the basis, sealing as the key, multi-channel fortification, * * * together" and attach importance to reasonable waterproof.

structure

Design and optimization

waterproof material

And paint grade. Instructions must also be provided when necessary, so that the construction personnel can correctly grasp them.

Key position

The operation of. Therefore, improper waterproof scheme design often occurs.

Extremely easy

Causing water leakage in the outer window.

2) The waterproof construction of the outer window and the outer wall is not carefully constructed in strict accordance with the operating procedures and design requirements, and the waterproof measures in some places are improper, resulting in

give exact information

The quality of the joint is poor, and the sealing effect can not meet the requirements of the specification.

Sitting in the mud

Non-standard construction such as drilling and punching holes is also the cause of leakage.

3) Operation outside the window

working procedure

Improper management measures, such as finished product protection and testing, are not carried out according to relevant requirements, which leads to the failure to guarantee the waterproof quality of external windows, resulting in cracks and leakage.

Key points of waterproof construction for external windows and external walls:

External window position

water proofing work

By waterproof professional team construction.

1) Remove the old glue. Remove the glue from the leaking part of the outer window.

2) Check the window frame joints. Look at the seams.

shape

and

measure

Whether it meets the sealing design requirements and whether the joints are sealed.

disadvantage?

And cracks are treated first.

3) Joints

surface

Handle. use

Clean water

Rinse the seam between the window frame and the wall to achieve dust-free, sand-free, pollution-free and

odds and ends

4) Construction of joint sealant.

in building

When replacing the tank, it should be noted that the new tank should be shaken to 1.

Min, then unscrew the empty can and put it away as soon as possible.

Fresh material

Change the jar to prevent it

spray gun

The connection port is blocked due to solidification.

5) Embedding sealant.

foam

The caulking agent filled structure 60

Minutes later, cut with a knife, leaving six gaps around the frame.

Millimeter deep notch, then filled and sealed with sealant. When filling sealant, the operation should be smooth, and the gun nozzle should always be aimed at the joint.

bottom

dip angle

45 。 Always keep the extruded sealant at the front end of the gun nozzle when moving; Inside the seam

extrusion force

Don't drag glue away from the gun. Avoid leakage or holes; The strip should be straight,

assembly line

The surface is neat, smooth and beautiful.

6) Plastic surgery. Compaction with scraping strips consistent with the joint surface, and trimming the glue joint to make the sealant fully contact and penetrate.

structure

Surface, repulsion

bubble

And excess sealant is removed to form a smooth and streamlined sealed seam.

7) Open the drain hole.

aluminium alloy

waistband

Xiasill

Drainage holes should be opened, and the position and number of drainage holes should be ensured.

When it is difficult

The lower sill drains smoothly.