Waterproofing The bathroom originally had the black asphalt waterproofing made by the developer to b

If it has been waterproofed before, if it does not fall off, there is no need to shovel it off. If you are afraid that the waterproofing will not be done well, you can redo the waterproofing on it.

There is no need to eradicate the original asphalt waterproofing, if it will leak, you can use the asphalt waterproofing to do it again, that is, the original must be clean and free of dust and water and oil!

There is no need to shovel off the original waterproofing, and it is enough to add a layer of waterproofing on top after leveling

Summary. The state has long stipulated that asphalt is not allowed to be used as waterproof materials, and I think you should be talking about polyurethane waterproof materials. However, most of the waterproof subcontracting materials in the general construction contract are relatively poor, and if you are not at ease, you can eradicate and reconsider waterproofing.

If you have done a closed water test yourself and do not leak for 72 hours (generally 48 hours) without shoveling, make a coating waterproof layer on this basis after making a protective layer. However, it should be noted that all kinds of upper pipe roots, floor drain openings, and yin and yang corners where the ground and wall intersect must be waterproof and strengthened.

Waterproofing The bathroom originally had the black asphalt waterproofing made by the developer to be removed

Hello, I have seen your question and am sorting out the answer, please wait a while The country has long stipulated that asphalt is not allowed to be used as a waterproof material, and I think you should be talking about polyurethane waterproof materials. However, most of the waterproof subcontracting engineering materials in the general construction contract are used only to change the nuclear poor, and if the lead is not destroyed, it can be eradicated and reconsidered for waterproofing. If you have done a closed water test yourself and do not leak for 72 hours (generally 48 hours) without shoveling, make a coating waterproof layer on this basis after making a protective layer.

However, it should be noted that all kinds of upper pipe roots, floor drain openings, finger digging yin and yang corners at the intersection of the ground and the wall must be waterproof and strengthened.

Waterproofing The bathroom originally had the black asphalt waterproofing made by the developer to be removed

The state has long stipulated that asphalt is not allowed to be used as waterproof materials, and I think you should be talking about polyurethane waterproof materials. However, most of the waterproof subcontracting materials in the general construction contract are relatively poor, and if you are not at ease, you can eradicate and reconsider waterproofing. If you have done a closed water test yourself and do not leak for 72 hours (generally 48 hours) without shoveling, make a coating waterproof layer on this basis after making a protective layer.

Summary. Hello, glad you asked, do you mean to re-waterproof the bathroom.

Waterproofing The bathroom originally had the black asphalt waterproofing made by the developer to be removed

Hello, glad you asked, do you mean to re-waterproof the bathroom.

Yes. Okay, please wait.

Can you apply waterproof paint directly to the ointment?

Hello, your original waterproof material can be removed or not eradicated, and there is no harm in not eradicating it is equivalent to doing an extra layer of waterproofing.

Can the original ointment be brushed with waterproof paint?

It can be brushed, but it is not recommended to brush it directly, the waterproof nature of the ointment is not very good, and the bonding of the two materials may not be very good if it is brushed directly.