JS waterproof coating construction common problems and solutions!

What is JS waterproof coating?

JS waterproof coating refers to polymer cement waterproof coating, also known as JS composite waterproof coating

What are the characteristics of JS waterproof coating?

1> Wet surface construction, the coating is tough and high-strength

2> Adding pigments can make a colorful decorative layer

3> Non-toxic, odorless, green and environmentally friendly, it can be used for waterproofing of edible pools

4> The drying speed is fast and the construction period is shortened

5> High temperature resistance (140℃), especially suitable for waterproofing of roads and bridges

6> It is suitable for waterproofing of exterior walls and inclined roofs with facing materials, and construction on facades, inclined surfaces and top surfaces, and can be firmly bonded with various outer materials such as base surface and facing bricks, roof tiles, cement mortar and so on

Scope of application of JS waterproof coating

It can be used on various wet or dry base surfaces (such as: masonry, mortar concrete, metal, various thermal insulation layers) and various waterproof layers (such as: SBS, APP, modified asphalt membrane, asphalt, etc.

JS waterproof coating construction technology and common problems and solutions

1.

Basic treatment → do detail nodes → first coating → second coating → first closed water inspection → protection waterproof surface layer → second closed water inspection → project quality acceptance

2.

The most critical steps in waterproof construction are the base surface treatment and the waterproof reinforcement treatment of detail nodes

3.
How to deal with the grassroots?

(1) The slope of the ground drainage shall meet the design requirements;

(2) The base layer should have sufficient strength, be solid, flat, and free from sand, and the base layer should be free of stagnant water and clear water;

(3) Dust, oil, particles and other debris on the surface of the base layer should be cleaned up;

(4) Cement mortar should be used to form small rounded corners at the intersection of plane and elevation, corners and yin and yang corners;

(5) Pipe fittings, sanitary ware, floor drains, drains, etc.
connected to the base layer should be securely installed before the construction of the waterproof layer, and the construction of the waterproof layer must be completed;

(6) The surface of the pipe should be roughened or rust-proof
.
 

4.
What principles and standards should be followed for painting the waterproof layer?

When painting the waterproof layer, follow the principle of first detail (pipe root, water outlet, etc.
) and then large surface (wall and ground)
.
The yin and yang corners should be made into circular arcs.
Before large-area waterproofing construction, the sealing material should be embedded in the reserved grooves according to the design requirements.
all over paint
.
The waterproof coating is fully coated without omission, and it is firmly bonded to the base layer
.
No bubbles, no cracks, no delamination, the surface is flat, the brushing height of the rolled part is basically the same, and the thickness must meet the specified requirements of the product
.
The construction of the waterproof coating film shall be carried out in steps according to the time schedule specified in the manual.
After the construction link is completely completed, other follow-up constructions shall be carried out
.
 

5.
Is the thicker the waterproof coating the better?

This is not the case.
Some rigid waterproof materials are made too thick and are prone to cracking.
When painting, it is forbidden to apply a thick brush once, and multiple thin brushes should be used
.
 

6.
What are the specific waterproofing requirements for each part of the house?

The floors and walls of all rooms in the bathroom, kitchen, balcony, basement, and first-floor households must be waterproofed
.
Water pipe grooves in the wall should also be waterproofed
.
When pipes, floor drains, etc.
pass through the floor, the waterproof layer around the holes must be carefully constructed
.
The buried water pipes in the wall should be chiseled with grooves larger than the pipe diameter, and the plastering in the grooves should be smooth and waterproof
.
Tip: If the original drainage and sewage pipes and floor drains are changed during decoration, waterproof measures must be strengthened around the area
.
 

7.
Which key links should be supervised during the construction of the waterproof layer?

①The waterproof part should be comprehensive;

②The construction of the waterproof layer should be painted in strict accordance with the product instructions and brushed to the specified thickness;

③The construction process should be meticulous: the joints between the wall and the ground, the yin and yang corners, the water pipes, the floor drains and the periphery of the sanitary ware and the seedling ditch where the cold and hot pipes are laid are the key waterproof parts, and the construction must be meticulous
.
 

8.
After the waterproofing is done, why should the closed water test be done?

The closed water test can verify whether the waterproof function of the waterproof layer is normal
.
For the closed water test, the door and the water outlet should be sealed.
The depth of the aquifer at the highest point should not be less than 20 mm, and the water storage time should not be less than 24 hours.
Check whether there is any leakage point
.

9.
How to judge whether the waterproof is done?

Mainly through the closed water test
.
Visual inspection method: Open the downstairs toilet and bathroom to observe whether there are traces of water seepage or water droplets
.
Contact inspection method: touch the suspected water seepage with your hand to confirm whether there is water leakage
.