In Stock
7.27€ / sheet
Ex Tax: 5.86€ / sheet
10.09€ / m²
Application
Basement insulation
Application
Concrete plates
Application
Ground floor insulation
Type
Other polystyrene products
Application
Plinth insulation
In Stock
6.50€ / sheet
Ex Tax: 5.24€ / sheet
9.03€ / m²
Thermal conductivity (W/mK)
0.022
Type
Other polystyrene products
Application
Wall insulation
Length (mm)
1200
Width (mm)
600
Frequently asked questions about the FINNFOAM category
FINNFOAM — what is it and what are FINNFOAM boards used for?
FINNFOAM — a rigid extruded polystyrene (XPS/FF‑PIR) thermal insulation for foundations, walls, floors and roofs. Boards are moisture‑resistant, dimensionally stable and available in thicknesses from 20 to 200 mm and standard sizes such as 600×1200 and 585×2485.
What is the difference between FINNFOAM XPS FL300 and FI300?
FL300 and FI300 are XPS grades with similar thermal performance. FL300 is commonly supplied in smooth board formats like 50×585×2485 or 100×585×2485, while FI300 appears in sizes such as 20×600×1200 and 30×600×1200 SE; choose by required board size and application.
What standard sizes and thicknesses are FINNFOAM boards available in?
Standard sizes include 600×1200 and 585×2485, with thicknesses ranging from 20 mm up to 200 mm. Product names list common thicknesses such as 20, 30, 50, 100, 150 and 200 mm to guide selection.
Is FINNFOAM 20 mm suitable for insulating floors or walls?
FINNFOAM 20 mm (e.g. 20×600×1200 FI300) is suitable for supplementary thermal or acoustic insulation, but primary insulation for load‑bearing floors typically requires thicker boards (50–100 mm) depending on thermal calculations.
What does RELJEEFNE/FL300 mean in FINNFOAM XPS RELJEEFNE FL300 100X585X1235?
RELJEEFNE denotes a relief (textured) surface and FL300 is the XPS grade. The size 100×585×1235 indicates 100 mm thickness and board dimensions 585×1235 mm for installation purposes.
Can FINNFOAM FF‑PIR ALK be used for roofing and how does it differ from XPS?
FINNFOAM FF‑PIR ALK is a PIR board with ALK facing designed for roofs and applications requiring improved fire performance and higher thermal efficiency. Compared with XPS, PIR typically offers better insulating value and enhanced fire resistance.
Which FINNFOAM sizes are suitable for foundation insulation?
For foundations use moisture‑resistant XPS boards FL300/FI300 with thicknesses from 50 to 200 mm in formats like 585×2485 or 600×1200. RELJEEFNE textured boards improve adhesion when used for vertical insulation against soil.
Is FINNFOAM XPS 100 mm suitable for attic/floor insulation?
FINNFOAM XPS 100 mm (e.g. 100×585×2485) is a common, durable choice for attic/floor insulation. Confirm it meets the required thermal resistance for your project.
What are the benefits of FINNFOAM RELJEEFNE textured boards for floor installation?
RELJEEFNE textured surface improves adhesion to adhesives and levelling compounds, reduces board slippage and aids load distribution. It’s useful under screeds and thin levelling layers.
Which FINNFOAM boards are best for exterior insulated walls under render?
For exterior insulated walls under render choose moisture‑resistant XPS FL300/FI300 boards in 50–150 mm thickness. RELJEEFNE improves render adhesion, while smooth boards are better for adhesive/fixed systems.