Achieving a 0.18 U-value with Multifoils

We understand that finding out the ideal solution for your roof project can be a minefield.

If you are undergoing a refurb/extension roof project in the UK, you are commonly given 0.18 as a target U-value.

Achieving a 0.18 U-value with Multifoils couldn’t be easier.

Our Multifoil Insulation products, such as BreatherQuilt and SuperQuilt will save on;

  • Cost
  • Space 
  • Installation Time
SuperQuilt Insulation’s Triple Layer System to achieve 0.18 – Manchester 2018

Our Multifoil products are fully certified and backed up by BDA & LABC. LABC stands for “Local Authority Building Control”. LABC approval means all local councils are required to accept the products.

SuperQuilt Insulation have a range of methods to achieve a 0.18 U-value. Dependent on the access to your roof would determine the best solution for your project.

If you have access to both under rafter & over rafter, we advise the following two solutions;

Under Rafter & Over Rafter Detail

Triple Layer System Detail. Commonly achieves a 0.17 or 0.18 U-value.

The main benefit of these two systems is no requirement for Rigid PIR Insulation. (Kingspan / Celotex)

Excluding Rigid PIR Boards dramatically saves labour time and wastage.

If you are insulating only from the underside of the rafters. For example if you are not re-roofing. We advise the following details;

Under Rafter only Details

  • 1 Layer SuperQuilt & 65mm PIR Insulation (0.022)
  • 2 Layers SuperQuilt & 32.5mm Insulated Plasterboard
  • 1 Layer SuperQuilt & 140mm Mineral Wool (0.044)
  • All above based on 600mm Centres and Breather Membrane
Double Layer SuperQuilt & Insulated Plasterboard detail to 0.18

If you are re-roofing on your project, and only have access to the external of roof, we advise the following details;

Over Rafter only Details

  • 1 Layer BreatherQuilt & 100mm PIR Insulation (0.022)
  • Triple Layer System (All External) – Product Link
  • Both above based on 600mm centers & standard existing plasterboard.
BreatherQuilt Multifoil Insulation & PIR Insulation detail to 0.18

The 7 calculations above and over 750 solutions in total are available on our Online U-value Calculator. Our calculator is free to us and gives instant results. It will also email you a PDF document of the calculation, which you can forward on to your building control officer.

To use our Free Online U-value calculator, Click Here!

Require a bespoke U-value calculation? Email;! Our team will be back in touch within 24 hours!

SuperQuilt Insulation have a healthy stock of all promoted products. We deliver nationwide on a Free Next Working Day Service.*

Below are some product links to order our insulation products online;

To place an order over the phone, please call our trade team on 0114 323 0045.

*Free Next Working Day Delivery relates to orders over £100 (Ex VAT) Orders also must be placed before 2pm. Weekend orders are delivered Tuesday.*