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Build your system
You select the layers of the habitable attic one at a time, one per screen. At the end you see the resulting System 10 package, the R and U values, the material requirements, and you can request a quote.
Technical content: Bogdan Ivănescu, graduate engineer, PhD candidate at the Technical University of Cluj-Napoca · updated on 16.10.2026
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What is the depth of the rafters?
You select the depth of the rafters; this determines how much Wolle insulation fits between them.
02 · Below the roof coveringWhich membrane is below the roof covering?
The first layer below the tiles or metal sheeting, over the roof boarding.
03 · Between raftersWhich insulation do you place between the rafters?
The thickness that fills the structure.
04 · Below raftersWhich reflective layer do you place below the rafters?
The reflective vapour barrier beneath the underside of the rafters, with the aluminium facing the air layer.
05 · Before the finishDo you add a second reflective layer?
Between the profiles and the plasterboard, with the aluminium facing the air layer.
What is the area of the habitable attic?
If you do not have a design to hand, the area is sufficient.
Material requirements
The quantities include 3% for overlaps and waste and are rounded up to whole rolls and packs. For Wolle, the configuration of slabs/rolls is determined according to the predominant clear spacing between rafters.
All packages with 15 cm of Wolle
Values for the entire build-up, from the canonical table of System 10 packages. Conventional insulation: the same resistance R with λ 0.038 (R × 0.038). For Basic, Basic+, Medium and Medium+, the values are for the package without the optional exterior membrane.
See and touch the products before ordering
The Isoflect sample pack contains samples of the reflective membranes and of Wolle wool insulation, so that you can compare the materials at home or on site.