High‑performance extruded polystyrene (XPS) insulation boards for plinths, splash zones and below‑ground perimeter applications.

Plinth & Perimeter  boards are engineered for areas exposed to moisture, frost and mechanical loading, providing a robust thermal layer around the building perimeter. Their closed‑cell structure delivers exceptionally low water absorption, high compressive strength and long‑term thermal stability — ideal for insulating foundations, basement walls, slab edges and exposed plinth zones.

The boards can be installed against waterproofed masonry, concrete or insulation systems, and are suitable for both new build and retrofit. Their precision‑cut edges ensure tight joints, while the durable surface resists impact and site handling.

• Closed‑cell XPS insulation for plinths, splash zones and below‑ground use

• Extremely low water absorption and high freeze–thaw resistance

• High compressive strength for ground contact and backfilled areas

• Dimensionally stable, rot‑proof and resistant to soil moisture

• Compatible with Soprema waterproofing and façade systems

Available sizes:

600mm x 1250mm – 40mm boards are supplied as individual sheets, mainly for perimeter insulation for Limecrete floors.

Installation is straightforward, with boards easily cut to size and applied to surfaces. They can be used in conjunction with other systems for enhanced insulation and are compatible with various finishes.

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Sopravap Hygro is a vapour control and airtight membrane with variable water vapour diffusion resistance and high resistance to tearing.

Sopravap Hygro is applied on the warm side of the thermal insulation, In combination with Pavabond and Pavafix, Sopravap Hygro guarantees the airtightness of walls, floors and roofs.

Size:

Supplied in 1.5 m x 50 m rolls (75 m²).

Characteristics:

Finish upper side moisture regulating polymers
Reinforcement polypropene grid
Finish lower side non-woven polypropene fleece
Mass (g/m2 ) (EN 1849-1) 110 +/- 15
Colour white-transparent
Tensile force L x T (N/50 mm) (EN 12311-2) ≥ 320 x 285
Elongation at maximum tensile force L x T (%) (EN 12311-2) ≥ 15 x 15
Resistance to tearing (nail shank) L x T (N) (EN 12310-1) ≥ 315 x 340
Water vapour diffusion-equivalent – Sd (m) (EN 1931) 0,5 – 55
Watertightness (EN 1928-A) conform
Reaction to fire (EN 13501-1) E

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