35mm STEICO Universal Wet Wood-Fibre Insulation Board - Sarking and Sheathing Board - 1880mm x 600mm
35mm STEICO Universal Wet Wood-Fibre Insulation Board - Sarking and Sheathing Board - 1880mm x 600mm
- Product Code: A1-6969
- Delivery Time: 2 - 4 days
- Brand: Steico
- Model: 1880mm x 600mm - 1.13m2
- Weight: 10.68kg
Our ratings on 11-11-2026:
4.8 out of 5
35mm STEICO Universal Wet Wood-Fibre Insulation Board - Sarking & Sheathing Board - 1880mm x 600mm
Length: 1880mm
Width: 600mm
Thickness: 35mm
Board coverage: 1.13m2
Density: 270kg/m3
Weight/m2: 9.45kg
Weight: 10.68kg
Thermal Conductivity: 0.048W/mK
R-Value: 0.7m2K/W
Fire Rating (Reaction to Fire): E
35mm STEICO Universal Wet is a high-density, rigid wood-fibre insulation board designed for both roof and wall applications. Manufactured using the traditional Wet Process, it relies on the wood’s natural lignin to bond the fibres together, creating a robust, vapour-open board that is exceptionally eco-friendly. STEICOtherm Universal is a multi-purpose sarking and sheathing board designed to wrap the exterior of a building.
CHARCTERISTICS
- Weather Resistance: The boards are impregnated with natural paraffin (wax) during manufacturing. This allows them to serve as a temporary weather layer for up to four weeks during the construction phase, protecting the structure before the final roof tiles or cladding are installed.
- High Density & Strength: With a density of approximately 270kg/m3, it is much harder than "Therm" boards. This high density provides incredible compressive strength (200kPa) and superior sound insulation.
- Tongue & Groove (T&G) Profile: Typically supplied with a precision-engineered T&G profile on all four sides. This creates a wind-tight, interlocking "rain-screen" layer that eliminates thermal bridging at the joints.
- Vapour Permeability: Like all Steico wood-fibre products, it is highly breathable. It allows moisture from within the building to escape safely, reducing the risk of interstitial condensation and rot in timber frames.
APPLICATION
- Roof Sarking: Installed directly over rafters. It provides a continuous insulation layer that keeps the rafters warm and dry while significantly reducing summer overheating.
- Wall Sheathing: Fixed to the outside of timber frame studs. It replaces traditional OSB or plywood sheathing, providing both structural racking support and a breathable thermal wrap.
- Renovation: Excellent for over-insulating existing roofs or walls to meet modern building regulations without losing internal space..
CERTIFICATIONS
Steico_Technical-Data-Sheet-Universal.pdf
Brand: Steico
Model: 1350mm x 140mm
Delivery Time: 2 - 4 weeks
20mm STEICO Fix is a high-density, wedge-shaped insulation profile designed to sit directly beneath external window sills. Its primary function is to provide a thermally efficient, waterproof safety layer that directs any moisture or driving rain away from the structure and back to the outside of th..
Brand: Steico
Model: 1200mm x 380mm - 0.46m2
Delivery Time: 2 - 4 days
80mm STEICOtherm Internal Wet is an ecological, vapour-open insulation board designed for applications where moisture management and thermal mass are critical. The Square Edge (SE) profile makes it particularly suitable for internal wall insulation (IWI) and floor systems where a tight, flush fit is..
Brand: Steico
Model: 1325mm x 600mm - 30.40m2
Delivery Time: 2 - 4 weeks
60mm STEICO Special Dry is a multi-purpose, rigid wood-fibre insulation board manufactured using the modern Dry Process. It is designed to be installed on top of rafters (sarking) or on the outside of timber frame studs (sheathing). Because it is produced in a dry process, it can be manufactured in ..
Brand: Steico
Model: 1350mm x 180mm
Delivery Time: 2 - 4 weeks
23mm STEICO Fix is a high-density, wedge-shaped insulation profile designed to sit directly beneath external window sills. Its primary function is to provide a thermally efficient, waterproof safety layer that directs any moisture or driving rain away from the structure and back to the outside of th..
Brand: Steico
Model: 1350mm x 600mm - 0.81m2
Delivery Time: 2 - 4 days
20mm STEICOtherm Wet is an ecological, vapour-open insulation board designed for applications where moisture management and thermal mass are critical. The Square Edge (SE) profile makes it particularly suitable for internal wall insulation (IWI) and floor systems where a tight, flush fit is required..
Brand: Steico
Model: 1190mm x 575mm - 13.60m2
Delivery Time: 2 - 4 weeks
220mm STEICOflex 036 is a flexible, high‑performance wood‑fibre insulation slab designed for exceptional thermal comfort, acoustic absorption and healthy building performance. Made from sustainably sourced wood and certified to rigorous European standards, it offers one of the best thermal conductiv..