Above roof rafter insulation
Installing STEICO sarking & sheathing roof boards above the rafters, provides numerous benefits.
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Reduces thermal & cold bridging in the roof elements
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Provides an additional weather & water protection layer
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Improves sound proofing properties of the building envelope
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Boards can be exposed to the elements for up to 12 weeks
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Vapour open allowing moisture in the building fabric to escape
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Reduces air draughts due to its Tongue & Groove design
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Provides additional bracing strength to the building element
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Adds additional fire resistant qualities to the building envelope
STEICO sarking & sheathing roof boards at a glance
We carry the Steico Universal, Duo Dry , Special Dry and Safe wood-fibre boards that are all suitable for above roof rafter installation.
The boards are hydrophobic, i.e., water-repellent. Rainwater’s surface tension cannot break through sarking boards but runs off the surface. Provided with a tightly closing, all-round tongue and groove profile, the boards offer a rainproofing function and serve as temporary covering
The boards come in standard sizes and a variety of thicknesses & R values. Click on the buttons above for product details.
Above rafter insulation examples
Installing STEICO sarking and sheathing roof boards above the rafters provides numerous benefits.
Pitched Roof
"New"
Roof construction with solid timber rafters
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Inner lining
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Service void with​ Steico Flex036​ insulation
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Vapour control layer
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Timber rafters
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Steico Flex036​ insulation
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Steico boards (Universal / Duo Dry / Special Dry)
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Battens to provide ventilation layer + roof cover
Pitched Roof "Renovation"
Modernised roof with the STEICO insulation system
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Existing lining board
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Steico Flex036​ between the studs
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Existing timber rafters
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Membrane
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Wood-fibre boards (Universal / Duo Dry / Special Dry)
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Battens to provide ventilation layer + roof cover
Roof construction
"Flat"
With Standing Seam Roof
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Inner lining (Plaster board / OSB
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Service void with​ Steico Flex036​ insulation
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Vapour control layer
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Timber roof joist
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Steico Flex036​ insulation
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Wood-fibre board Special Dry
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Diffusion open membrane​
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80 mm ventilated airspace battens @ 600mm centres, covered with 18 mm OSB / plywood.
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EPDM
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Final roof covering
