Flat Roof Insulation

Flat roofs are extremely in need of insulation, especially in the UK, as they are prone to leaking, loss of heat and can cause other materials to deteriorate, therefore flat roof insulation is highly necessary and should always be considered when residing in a home with a flat roof.


There are a variety of different uses and reasons to install flat roof insulation in your home and the best and smartest way to tackle any issues incurred from having a flat roof can be prevented using flat roof insulation boards. There are a variety of unique flat roof insulation board options we have to offer, one of our favourite options is the Kingspan insulation thermaroof, which has a built-in waterproof feature to prevent those leaks that often occur with flat roofing.

Installing flat roof insulation boards in your homes flat roof has also proven to be more economical, especially when you are already changing or replacing your roof covering. This can control both cold and warm temperatures as well as prevent condensation within your home, in turn preventing damp from occurring in your ceilings and walls. Choosing the right option for your flat roof insulation is imperative and should be carefully considered with a variety of options.

Making a Choice

As mentioned above, choosing the correct flat roof insulation is extremely important to protect the value of your home, while preventing it from damp and leaking, while also preventing yourself from incurring a number of health issues that come with damp walls and ceilings.

It is also worth considering investing in some other Flat Roof Materials if you are looking to completely re-work your flat roof. This can include items such as Flat Roof Vents which help add ventilation to the rooms below and the building as a whole. Furthermore it might be worth investing in some Flat Roof Skylights, to help bring a contemporary style to your home. Also mentioned earlier, our favorite choice to offer you, and certainly the more versatile option is the Kingspan insulation board. 

Flat Roof Insulation Guidelines

The Kingspan TR26 Flat Roof Insulation is designed for flat roofs waterproofed with mechanically fixed single-ply waterproofing. It has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP). Manufactured with a blowing, TR26 is a High-performance rigid thermoset polyisocyanurate (PIR) insulant. Insulation is needed to reduce heat loss in the winter and control excessive heat during the summer. This will help to conserve energy and ensure comfort is maintained within the building. Insulation can also help to reduce condensation and depending on the type of insulation used, contribute to acoustic insulation.

What is a U value of a flat roof?

To comply with Part L of the building regulations 2010, all roofs except those in unheated buildings should be thermally insulated to a maximum U-value of 0.18 W/m²K.
A lower U-value means better flat roof insulation, therefor U-value requirements usually specify a maximum value.
U-value calculations take into account the thermal resistivity and thickness of the flat roof insulation.
the rate of heat transmission through a unit area for each degree of temperature difference from inside to outside the building. The rate of heat transmission through a unit area for each degree of temperature difference from inside to outside the building is known as Thermal Resistance.

In summary, flat roof ceilings are a pain when it comes to keeping your home warm and damp free, therefore it is utterly necessary to have the correct and ideal flat roof insulation as this will result imperative to keeping a comfortable living environment.

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