Building Regulations
Recommended U Values for Domestic Buildings.
Whether it be a new build or retrofit, there are a set of standards to which thermal insulation must adhere in order to comply with Building Regulations. These standards are set out by the Government to ensure homes are designed to be energy-efficient and compliant.
What is a U Value?
A U-Value is a measure of heat loss in a building element such as a wall, roof, or floor. It measures how well parts of a building transfers heat. This means the higher the U value the worse the thermal performance of the building. A Low U-value usually indicates high levels of successful insulation.
Knowing the U-Value of a building is a useful way of predicting the composite behavior of an entire building element rather than relying on the individual materials. To calculate the U value of a building element such as a wall, floor, or roof, you need to know the build-up of the specific element. The properties of each element are required to calculate the overall u-value as accurately as possible. Use an online U Value calculator to work out the energy efficiency of your home.
ENGLAND - Current Building Regs 2021
| Element | New Build | Extension | Renovation |
|---|---|---|---|
| WALL | 0.18 | 0.18 | 0.3 |
| FLOOR | 0.13 | 0.18 | 0.25 |
| PITCHED ROOF – CEILING LEVEL | 0.11 | 0.15 | 0.16 |
| PITCHED ROOF – RAFTER LEVEL | 0.11 | 0.15 | 0.16 |
| FLAT ROOF | 0.11 | 0.15 | 0.16 |
SCOTLAND - Current Building Regs 2018
| Element | New Build | Extension | Renovation |
|---|---|---|---|
| WALL | 0.15 | 0.17 | 0.22 |
| FLOOR | 0.13 | 0.15 | 0.18 |
| PITCHED ROOF – CEILING LEVEL | 0.10 | 0.11 | 0.15 |
| PITCHED ROOF – RAFTER LEVEL | 0.10 | 0.13 | 0.18 |
| FLAT ROOF | 0.10 | 0.13 | 0.18 |
WALES - Current Building Regs 2018
| Element | New Build | Existing |
|---|---|---|
| WALL (DWELLINGS) | 0.18 | 0.18 |
| WALL (FLATS) | 0.21 | 0.21 |
| FLOOR | 0.15 | 0.15 |
| PITCHED ROOF – CEILING LEVEL | 0.13 | 0.13 |
| PITCHED ROOF – RAFTER LEVEL | 0.13 | 0.13 |
| FLAT ROOF | 0.13 | 0.13 |
Why Choose SuperFOIL?
We are a team of highly skilled professionals with years of experience in the field; we are dedicated to saving you time, space, and money on your projects. Our products are suitable for all building types- both flat roof and pitched roof insulation projects. We’ve worked with a vast range of clients, from office buildings to campervan conversions; we’ve done it all. Please take a look at our case studies to see the range of works we have completed. All of our insulation products are tested and certified by the BBA so that you can have peace of mind with our roof insulation.
Unsure Where To Start?
Take advantage of our free insulation guide; an in-depth look into everything you need to know for insulating your project.