Insulation & Drylining
PIR Insulation Boards delivered across Cornwall
PIR (polyisocyanurate) insulation boards are rigid foam boards with foil facings that give a lot of insulation for their thickness, used in floors, walls, pitched and flat roofs.
Builders, trades and self-builders in Cornwall can order PIR insulation boards for delivery to Redruth, Newquay and the towns in between.

Cornwall at a glance
- Covering
- 6 towns across Cornwall
- Postcode areas
- TR, PL
- Delivery
- Standard mainland delivery
- How it arrives
- Wrapped packs
- Neighbouring areas
- Devon, West Glamorgan, South Glamorgan
Which PIR insulation boards can you order in Cornwall?
- General-purpose PIR boards2400 × 1200 mm foil-faced boards for floors, walls and roofs.
- Foil tape and fixingsTo seal joints and fix boards.
- Thermal laminate boardsPIR bonded to plasterboard.
- Flat roof boardsBoards for warm flat roof build-ups.
- Cavity wall boardsBoards sized for partial-fill cavity insulation.
PIR Insulation Boards delivered in Cornwall towns
- PIR Insulation Boards in Redruth
- PIR Insulation Boards in Falmouth
- PIR Insulation Boards in St Austell
- PIR Insulation Boards in Truro
- PIR Insulation Boards in Camborne
- PIR Insulation Boards in Newquay
Quantities: a worked example
Insulating 20 m² of rafters, floor or wall takes 8 boards of 2400 × 1200 mm including offcuts. The thickness depends on the U-value you need, so check it before you order. Try the insulation calculator
Before your Cornwall delivery arrives
Boards are light but bulky; they travel in wrapped packs and should be stored flat and dry. Our standard mainland delivery area covers Cornwall.
- Keep cement, plaster and boards dry: have a tarpaulin or a garage space ready before they arrive.
- Pallets left on a pavement can block the footway, so plan a drop point inside your boundary where you can.
- If the site is up a shared drive or behind other houses, tell us the distance from the road.
Choosing PIR insulation boards
Sealing joints
Tape the joints with foil tape so the foil layer works as a continuous vapour control layer where the design relies on it.
Thickness for the U-value
The thickness you need depends on the U-value the building regulations require and the rest of the build-up. Manufacturers publish U-value tables; your designer or building control will confirm.
In England, building work is checked against the Approved Documents, for example Part A for structure and Part L for energy efficiency, through your council's building control team or a registered building control approver.
Your questions answered
How soon can PIR insulation boards be delivered in Cornwall?
We confirm the delivery date when we price your order, before you commit. It depends on the product, the quantity and whether it is a stock line or made to order.
Can I add other materials to my Cornwall delivery?
Yes. Put everything on one list, from PIR insulation boards to fixings and PPE, and we will price it as one delivery where the products can travel together.
Is PIR better than mineral wool?
PIR insulates more per millimetre, so it suits tight spaces. Mineral wool is non-combustible, cheaper per square metre and better for sound.
What is the foil for?
The foil facing reflects heat, protects the foam and, when joints are taped, can act as a vapour control layer.
PIR Insulation Boards in neighbouring areas
- PIR Insulation Boards in Devon
- PIR Insulation Boards in West Glamorgan
- PIR Insulation Boards in South Glamorgan
- PIR Insulation Boards in Dyfed
- PIR Insulation Boards in Mid Glamorgan
More materials delivered across Cornwall
Send your list, get a delivered price
Tell us what you need and where it is going. We check the quantities and come back with a delivered price before you commit.
