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When the joint of extruded board is more than 2mm, polyurethane foam joint shall be used. The thermal insulation performance of extruded polystyrene board is higher than that of rock wool board, but its fire resistance is not as good as that of rock wool board.

Extruded board insulation and decoration integrated board has a perfect closed honeycomb structure, which makes XOS extruded board have high compressive strength and anti-aging performance. Therefore, it is possible to consider long-term insulation of the inner wall insulation material without using internal insulation materials. XPS extruded board is better than EPS polystyrene board after embossing and slotting.

The gap between insulation boards should be tight. Once there is a gap, it needs to be glued with specialized tape. Otherwise, as construction progresses, the insulation board is easily detached, affecting future construction.

Therefore, if you want to isolate the interior wall, it is best to choose extruded polystyrene board insulation and decoration integrated board. It is very cheap and can keep the interior as dry as possible. EPS polystyrene board is directly placed inside and outside the building, occupying no space and easy to use. Extruded polystyrene board and polystyrene board offer higher performance and higher prices.