Wood Fibre (Rigid)

Dense materials like wood fibre provide additional benefits when insulating a roof, unlike the, often default use of Polyurethane boards - PIR, wood fibre is much more dense up to 275kg's per cubic metre. The boards are tongue and groove and simple and clean to fit. Most have a protective layer of natural wax to allow exposure to the elements during construction. These boards are vapour open which means they will enable the passage of trapped water vapour through the structure preventing damage to the structure caused by damp. these types of insulation are often used commercially in schools and hospitals for example where they are valued for their performance. 

Over the past few years many self builders and house builders have recognised the value and long term benefits to building health of using wood  to insulate roofs, with ever increasing demand on performance this usage will grow significantly as we move away form judging an insulations suitability solely on price and U value



Grid  List 
  1. Steico Special 1

    Steico Special Dry Wood Fibre Insulation Sarking & Sheathing Board

    Steico Special Dry is a stocked product, but it requires an oversize pallet to transport so is not available to buy online. Please call us for carriage rates.

    To order please call 01793 847 444 or email  info@ecomerchant.co.uk

    Steico Special is a versatile and highly efficient external insulation, water resistant board. U value 0.041W/m2K  Density 140Kg/m3

    For use on roofs and external walls for either new build or renovation projects.

    The board gives multiple benefits

    1. wind-proof layer
    2. T&G Profile
    3. Excellent phase shift - decrement delay - see diagram in product description for values
    4. secondary water resisting layer
    5. additional insulation layer
    6. FSC® chain of custody certified, recyclable 

    Store Steico Special Dry boards lying flat and must be stored in a dry place. Protect edges against damage. Remove packing only when the board is ready to be installed. Ecomerchant can deliver to site on time to minimise storaege and handlig issues.  When ordering please allow 2-3 days for delivery.

    Board Dimensions  1880mm x 600mm.  Tongue and groove profile to all 4 sides.  Coverage per board is approximately 1.06 m2

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  2. Steico Universal 1

    Steico Universal Wood Fibre Insulation Sarking & Sheathing Board

    Please Note this stock item requires an oversize pallet to transport so is not available to buy online. Please call us for carriage rates.  To order please call 01793 847 444 or email info@ecomerchant.co.uk

    Steico Universal sheathing board for is for both pitched roof and wall construction.  The board is made from natural wood fibres.  Steico Universal is designed for sheathing timber frame wall panels with stud framing not less than 38 mm in width and at maximum 600mm centres. The boards can resist weather exposure without deterioration during construction or if cladding is delayed.

    U value 0.48W/m2K - Density 270Kg/m3

    • High compressive strength
    • High heat protection during summer months
    • Excellent insulation qualities, prevents thermal bridging
    • Water vapour open, suitable for warm roofs
    • Water resistant due to special rebate on roof pitches ≥ 18°
    • May be fully exposed for up to four weeks in a temporary condition
    • Effective protection against wind, dust, moisture and sound
    • Enhanced vapour transfer
    • Contributes to an excellent room climate
    • Ecologically  and environmentally friendly, recyclable
    • Made of wood fibres, FSC® chain of custody certified

    Board measures 2500mm x 600mm each board covers circa 1.4m2

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  3. Steico Protect DRY Internal & External Wood Fibre Render/Plaster Carrying Board 1325mm x 600mm. 40, 60 & 80mm thick

    Steico Protect DRY Internal & External Wood Fibre Render/Plaster Carrying Board 1325mm x 600mm. 40, 60 & 80mm thick

    BOARD ONLY, for the render system please see "Ecomerchant EWI"

    Steico Protect DRY is a natural render carrying wood fibre insulation board with a tongue and groove profile manufactured in accordance with EN 13171, designed as an external sheathing board for timber frame constructions or for direct to masonry applications in external wall insulation systems where the render is applied directly to the board.

    It is quite common for architects and designers to specify Protect DRY boards in certain building applications and in combination with a separately specified finish or render system, this is why we sell the boards individually and not just as part of our Ecomerchant EWI Protect System. When sold separately as individual boards Ecomerchant offer no guarantees or warranties for Protect DRY when used in conjunction with renders, plasters or finishes.

    For ultimate peace of mind we recommend our certified, CE marked Ecomerchant EWI Protect System

    Board size 1325mm x 600mm. Board Coverage: 0.747m2 / board

    Available in 40mm, 60mm & 80mm thicknesses 

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  4. Steico Therm Internal T&G

    Steico Therm (T&G) Internal - Wood Fibre Insulation Board

    Steico Therm Rigid insulation board T&G edged is made from natural wood fibres. The tongue and groove edge adds the following advantages over the square edge board.

    1. Easier to fix to studs and rafters with an OSB backer board
    2. Quicker and easier to install
    3. Improves airtightness 
    4. Improved joint strength
    5. Less likely to leave gaps when installing

    Steico Therm Rigid insulation board T&G edged is normally used for internal renovations where the structure is built on studs (timber frame or a stud sub frame).  Using the T&G profile for stud applications helps minimise potential cracking of the plaster coat the T&G profile locks the boards together, effectively supporting the joints but the use of an OSB backer board is recommended.

    Like the square edge board Steico Therm T&G is suitable for wall and roof applications it can also be used as sub screed insulation (please ask us for technical guidance for sub screed use)

    Easy and fast fixing wood fibre board with superior insulating properties in both summer and winter. High compressive strength, water vapour open (helps regulate the indoor climate of a building) & fire resistant.

    The board has a light side (machine sanded in the factory) and a darker unsanded side, the lighter side is the plaster carrying face.

    FSC® accredited, ecologically friendly, recyclable.

    1200mm  x 380mm, each board covers 0.434m2

    Price is per board

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