The raw material is heated in special machines called pre expanders with steam at temperatures of between 80 100c.
Polystyrene roof slabs.
Find polystyrene ceiling tiles at lowe s today.
A filter fabric is placed on top of the polystyrene.
Engineered for use on heavyweight decks e g.
The concrete slab is cast step 2.
In nigeria clay hollow pot and sandcrete blocks have been successfully used but on the rise is the polystyrene.
A screed to fall layer is cast on top of the slab for run off step 3.
They come in different measurements both in width and thickness and they can be used in any part of your home.
The density of the material falls from some 630kg m3 to values of between 10 and 35kg m3.
Polystyrene sheets are the best for roofing and wall building because they resist water preventing leakage in your homes.
Expanded polystyrene is made from expandable polystyrene which is a rigid cellular plastic containing an expansion agent.
Reinforced concrete with a ballast layer of gravel or concrete slabs styrofoam brand roofmate insulation helps the roof membrane maintain a steady temperature minimizing the harmful effects of freeze thaw cycles weathering and physical damage during and after construction.