PIR boards
PIR boards insulate almost twice as well as wool, so they suit places where every centimetre counts.
Facts
- thermal conductivity, W/mK
- λ 0.022
- of the wool thickness for equal warmth
- ≈ 55%
- on both faces
- Foil
- aluminium, on every seam
- Tape
A PIR (polyisocyanurate) board is a rigid foam core with foil on both faces. Its thermal conductivity is about 0.022 W/mK, so the same warmth needs roughly half the thickness of wool.
We lay boards over or between rafters, on floor bases or against walls, butt them tight and tape every seam with aluminium tape. The foil then also works as a vapour barrier.
Where we install them
- Pitched roofs over rafters
- Flat roofs
- Ground-bearing and suspended floors
- Walls from inside, where space is short
- Attic rooms with low ceilings
How we work
We calculate
We choose the board thickness from the build-up and the thermal resistance you want.
We lay
We cut boards precisely, butt them without gaps and fill any joints with foam.
We tape
Every seam gets aluminium tape so the layer is continuous.
Questions
When is PIR better than wool?
When space is short: in a pitched roof, a floor or an attic room, PIR reaches the same warmth with a thinner layer.
Why tape the seams?
An untaped seam is a gap that lets air and vapour through. Aluminium tape turns separate boards into one airtight layer.
Request a quote
Tell us what you want insulated and where. We will reply with a price.