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Question:

The role of basement exterior wall waterproof polystyrene board

Can you use a multi-layer board for the waterproofing layer of the outer wall of the basement? Thank you for the chief engineer! More

Answer:

Of course it is phenolic board. Polyphenylene board is not a development of the production of waste storage and fattening. Cement foam board is hard to say. Foreign developed countries use the most phenolic board and rock wool board.
Polystyrene board is generally white, the density is very small, hand pinch can be very easy to make deformation, but also very easy to break off, break apart. Extrusion board generally have other colors, red, blue, gray, etc., density is much larger than polystyrene board, hand pinch is not deformed, it is difficult to break apart, breaking off.
I think support is the most difficult, as these small details, really does not matter.

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