Install flat roofs the correcticel way.
Flat roof insulation boards
Building, refurbishing, or retrofitting a flat roof deck? Do it the correcticel way.
Flat roof construction requires specialised insulation boards to support energy efficiency, minimise heat loss, and maintain durability in both new builds and refurbishment projects.
Get flat roof insulation right
When you choose Recticel, you're choosing quality – our insulation boards are extremely robust and will last for decades to come.
Retrofitting flat roof insulation is difficult, messy, and time-consuming. You may also have to remove the existing waterproof layer. So we'd always recommend getting it right the first time.
The insulation boards for flat roofs
We're guaranteed to have the perfect insulation solution for every flat roofing application.
Our flat roof insulation boards meet the very highest standards for durability, compressive strength, and thermal performance. By preventing moisture build-up and condensation, they'll also help prolong the life of your roof.
? Warm roof vs cold roof. What's the difference?
➡ Warm roof deck construction
Warm roof deck construction is the UK's preferred choice for homes.
Some of our insulation boards are designed for warm roofs, where insulation is placed above the timber deck and below the waterproof membrane, protecting against rain, wind, and temperature extremes. Warm roof decks also typically include a vapour control layer beneath the insulation.
As the name suggests, warm roof deck construction keeps the deck void at a similar temperature to the roof, eliminating the need for ventilation by reducing condensation risk, while also minimising heat loss, improving energy efficiency, and lowering heating bills.
➡ Cold roof deck construction
Cold roof deck construction is less common and mainly used in refurbishment projects.
With cold roof decks, insulation is installed below the deck, between the timber joints at ceiling level. As such, there's no need to replace the existing waterproof layer or raise the roofline, assuming the deck's structural integrity is intact.
Cold roof decks are at greater risk of condensation since void temperatures are colder than the room below, which can lead to moisture damage. However, they also typically have lower installation costs, take up less space, better support foot traffic, and are well-suited for outbuildings.
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