Roof Insulation Board

Our customers can choose from the best roof insulation brands on the market. Celotex, EcoTherm, and Kingspan are just a few of the brands that we stock. Our rigid roof thermal insulation boards are easy to install and ideal for both flat and pitched roofs. They are lightweight, strong, and can be easily handled and cut with a plasterboard saw. These roof insulation boards have thermal conductivity values as low as 0.022 W/mk, meaning they provide excellent protection against costly heat loss.

    close

    Product filters

    • Manufacturer

      keyboard_arrow_right
    • Thermal conductivity

      keyboard_arrow_right
    • Width

      keyboard_arrow_right
    • Thickness

      keyboard_arrow_right
    • Compressive strength

      keyboard_arrow_right
    • Material type

      keyboard_arrow_right

£43.50
inc VAT

Want a quotation?


£16.88
inc VAT

Want a quotation?


£16.88
inc VAT

Want a quotation?


£24.83
inc VAT

Want a quotation?


£24.83
inc VAT

Want a quotation?


£43.50
inc VAT

Want a quotation?


£43.50
inc VAT

Want a quotation?


£37.15
inc VAT

Want a quotation?


£37.15
inc VAT

Want a quotation?


£55.84
inc VAT

Want a quotation?


£68.77
inc VAT

Want a quotation?


£55.84
inc VAT

Want a quotation?


£68.77
inc VAT

Want a quotation?


£22.40
inc VAT

Want a quotation?


£43.32
inc VAT

Want a quotation?


£34.84
inc VAT

Want a quotation?


£18.48
inc VAT

Want a quotation?


£20.17
inc VAT

Want a quotation?

What are Roof Insulation Boards?

Roof insulation boards, which are also called roof insulation panels, are different insulation types that are tailor-made for pitched and flat roofs. The most common roof thermal insulation material is PIR. Polyisocyanurate is one of the most mass-produced insulation materials. It is popular because it has a thermal conductivity value of 0.022 W/mK, making it one of the best materials for trapping heat inside your home.

Insulation boards for loft roofs do not have to stand alone. You can use additional products to improve the efficiency of insulation boards. Lots of people use foil and acrylic tape to seal the space between boards. This ensures that the thermal properties of the boards are not compromised. Foil and acrylic tape are also a good option for people who want to repair wear and tear damage on roof insulation panels to keep the roof insulated efficiently.

General Purpose Roof Insulation Panels

Around 25% of the heat in your home is lost through the roof. People buy roof insulation boards when they want to improve the overall thermal envelope of their spaces roof. They are ideal for both domestic and commercial uses.

Some roof insulation board suppliers create general-purpose boards. The Celotex Insulation Board range contains general-purpose boards that can be used in floors, walls and roofs. They can even be installed under floorboards and in cavity walls. These PIR boards are rigid, lightweight, and have a low-emissivity foil facing to reduce heat loss.

General purposes boards are a good choice for people who want all the thermal benefits that come with PIR boards without having to research specific, purpose-built panels.

Pitched Roof Insulation Boards

Pitched roofs are characterised by being steep. In general, they are more thermally efficient than a flat roof because there is a gap between the flat interior and the pitched exterior which allows for ventilation.

High-quality roof insulation boards can reduce the amount of heat you lose through your pitched roof. You can put roof insulation boards between rafters and on the underside of the roof. Celotex and EcoTherm are popular choices for people who have pitched roofs. Their PIR insulation boards have a low thermal conductivity of 0.022 W/mK, which means they retain heat well within the building structure.

EcoTherm is one of the most trusted manufacturers of PIR insulation boards. The EcoTherm Eco-Versal PIR insulation boards range features fibre-free PIR rigid insulation boards that are comprised of an insulating core that is faced with aluminium foil on both sides. They do not sag or rot and are easy to cut and fit. You can manipulate these boards to fit around and between rafters with ease.

Flat Roof Insulation Boards

Flat roofs are less popular than pitched roofs. They are most common in areas that have high winds. A Flat roof has far more durable against high winds than pitched roofs with fragile tiles.

We stock lots of different insulation boards for insulating flat roofs. Kingspan’s Thermaroof range is perfect for people who want to create a thermal barrier between their home and their flat roof. Kingspan Thermaroof TR27 roof insulation panels have a thermal conductivity of 0.024 W/mK. They can be covered with fully adhered single-ply, partially bonded built-up felt, mastic asphalt, and cold liquid applied waterproofing. On the other hand, Kingspan’s Thermaroof TR24 can be used in conjunction with torch-on felt. In terms of flat roof insulation boards, Kingspan are the most reliable manufacturer on the market.

Frequently Asked Roof Insulation Panel Questions

What Are the Benefits of Roof Insulation Panels

There are many benefits to roof insulation, the main one being thermal performance as homeowners lose almost a third of the heat in their homes through their roofs. Roof insulation board costs pay for themselves when you consider the heat-saving benefits of installing them. You can trap up to a third of the heat in your home when you invest in roof insulation boards. Not only will this keep your home toastier for longer, but you will also save money on energy bills in the long run.

Insulation boards for loft roofs (pitched roof) typically have a life span of 40 years. The likelihood is that you will not have to invest in roof insulation panels twice. You might even be eligible for government assistance for the cost of the boards, which makes the lump sum payment even less daunting. The Green Homes Grant provides eligible homeowners with vouchers for energy-efficient improvements.

The less energy you use, the less carbon dioxide you produce. Eco-conscious individuals invest in pitched and flat roof insulation boards to improve the carbon footprint of their homes.

How to Cut Roof Insulation Boards

There are lots of different ways that you can cut roof insulation boards down to size. Most boards can usually be cut with a simple utility knife, although you can also use a manual or electronic saw in a safe construction environment. It is a good idea to cut insulation boards in a dedicated construction space that is spacious and organised.

You should always contact a professional when cutting an insulation materials. They will have up to date training and can recommend the best techniques for your specific insulation needs.

How to Install Roof Insulation Boards

We stock roof insulation boards for pitched roofs and flat roofs, which are relatively easy to install.

Installing flat roof insulation boards is simple. People who have flat roofs do not have to deal with awkward slants or difficult corners. Simply put the boards in place and secure them with screws that have large washers. Some people also use spray foam or caulk to hold smaller insulation boards in place.

People with pitched roofs can put roof insulation boards between rafters on the underside of the roof. Once the boards are in place, you can secure them in the same way that you would secure flat roof insulation boards.

If you are also looking for loft insulation in addition to insulated roofing sheets, you can find our range of rolls and boards here.