RAVATHERM XPS 300 SL thermal insulation
The blue color RAVATHERM™ XPS 300 SL extruded polystyrene foam thermal insulation can be used in a wide range of applications, owing to the following beneficial properties as a result of the closed-cell material structure:
- permanently high thermal insulation level
- negligible moisture uptake
- high strength and rigidity
- dimensional stability
- resistance to rot and deterioration
- simple and quick installation with small amount of waste.
RAVATHERM XPS 300 SL as multipurpose material is excellent thermal insulation for
- inverted roofwith gravel
- green roof
- terrace roof
- parking roof
- duo roof
- refurbishment – plus roof
- perimeter cellar walls
- perimeter walls in subsoil water
- basement, base slabs
- swimming pool
- frost protection
- standard building floor
- cold storage floor
- swimming pool base slab
RAVATHERM XPS 300 SL thermal insulation is manufactured by extrusion production procedure, the result of which is a homogeneous, closed-cell material structure, a smooth surface (so-called extrusion) crust and numerous favorable material properties:
- high, long-lasting thermal insulation performance
- water and frost resistance,
- high compressive strength,
- high flexible rigidity,
- high vapor diffusion resistance,
which make the product suitable for fully meeting all the demands of the numerous application areas listed.
The upside down roof is a recognized flat roof insulation solution that is proven by several decades of references. The outer side thermal insulation of building substructure frameworks by extruded polystyrene foam (XPS) boards also has a history of multiple decades in Europe. During dismantling and measurements it was demonstrated that the correctly built-in XPS plates preserve their excellent heat insulating capability for several decades, and maintain their shape and strength.
Between RAVATHERM XPS 300 SL thermal insulation which is placed in staggered manner without adhesives, and the ballast, which is generally a layer of gravel, a breathable, non-hygroscopic separation layer should be laid down with a 200 mm overlap, which together with the ballast layer provides the proper stability of the plates against wind load and flooding.
In case of inverted roofs, from a vapor diffusion aspect, an open design of the layer order above the thermal insulation must be used.
For the utilized roofs, it is strongly suggested to install a diffusion layer (at least 2-5 cm of gravel, crushed stone, etc.) between the thermal insulation and the soil layers, tiles, load distributing reinforced concrete slab.
STRUCTURES IN CONTACT WITH THE SOIL
The RAVATHERM XPS 300 SL boards with staggered edge finishing which can be fitted without a thermal bridge must be fixed with a closed gap, applying adhesives pointwise in an offset binding (at six points per plate), or when PUR Adhesive foam is used, it must be applied bandwise.
The thermal insulation can be cut easily and accurately using hand tools.
The maximum installation depth of the thermal insulation is determined by the load: the horizontal pressure must not exceed the compressive strength of the plates, considering the value that pertains to permanent load.
In the case of a compressed gravel bed or thin blind concrete, the RAVATHERM XPS 300 SL thermal insulation must be laid down directly in an offset binding, with sand leveling if necessary. If the thermal insulation is installed above the insulation protecting against soil moisture and ground water, it also serves as a mechanical protective layer.
In the case of normal floors and floor heating, the heavy-duty heat insulating layer provides a firm base for the base concrete (screed) and floor heating, where the heating pipes can be fastened directly to the thermal insulation. It is recommended to place a PE film separating and sliding layer between the thermal insulation and the base concrete (screed) layer. In the case of inter-floor slabs footstep sound isolation must be separately provided for.