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.