Under Rafter Insulation Kit

Under Rafter Insulation Kit

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Order within for free next working day delivery throughout mainland UK, excluding bank holidays.


Key Features

  • Really Easy Install – No Professionals Required
  • No Harmful Fibres – No Requirement for PPE
  • Significant Return on Your Insulation Investment
  • Prevents Energy Escaping Your Home
  • Lasts the Lifetime of the Build
  • Compresses to 6mm / Only 15mm Thick
  • Equivalent to 100mm of Fibre Glass
expand_circle_down Description

Fully Insulate Under Rafter

Did you know around 25% of heat can dissipate through your roof? By investing and installing this Insulation Kit you’ll be able to start saving immediately. Without the correct insulation you are consuming 25% more energy to get the same results as someone that has effective loft insulation.

Multifoil Insulation have created an Under Rafter Insulation Kit, which is easy to install, and highly effective. When installed Under Rafter it helps reduce energy bills by preventing heat loss through your roof.

What’s included in the Under Rafter Insulation Kit?

  • Multifoil Insulation – EcoQuilt Expert 1.5 x 10m

    (15m²)EcoQuilt Expert is a High Performing Multifoil Insulation at 15mm Thick – Compressing to only 6mm when installed. It is equivalent to 100mm of Rockwool or 50mm of Rigid Board Insulation such as Kingspan. This Multifoil will therefore help you retain heat, in less Cost, Space and Installation Time.

  • Staple Gun Kit

This comprises of a Heavy-Duty Staple Gun and 5,000 x 14mm Staples to Staple the EcoQuilt Expert into place.

  • 10″ Multifoil Insulation Scissors

Stainless Steel Scissors, suitable for Cutting Multifoils

Check out our How To Guides to see how to install a double or single layer of EcoQuilt Expert under rafter.


This Insulation Kit is easy to install yourself, you do not need professional installers. the Insulation does not contain any harmful fibres so you dont need any protective clothing or PPE to install it. You simply staple the Multifoil Insulation to the underside of the rafters. Ensure that you overlap each layer by 50mm and leave the overlaps untaped.

You also have the option to install battens and plasterboard if required.

Free Next Working Day Delivery

To anywhere in the UK Mainland, on all orders placed before 2pm.

If you require any further assistance at all, you can get in Contact Us. You can either Send us a Message or Request a Callback.

You can order online or via phone on 0114 323 0012

Although this application is the most popular, if you would prefer to Insulate your Loft Floor – Click HERE.

expand_circle_down How To Guides

How to Insulate your Loft (Under Rafter Detail)

How to Install a Single Layer of EcoQuilt Expert Under Rafter

How to Install a Double Layer of EcoQuilt Expert Under Rafter

expand_circle_down Specification
Thickness 15mm (5mm Compressed)
Roll Coverage15m²
Core R-value0.93m²K/W
Roof R-value1.83m²K/W
Wall R-value2.27m²K/W
Floor R-valueup to 5.56m²K/W
Foil Emissivity0.05
Water Vapour Resistance600MNs/g
expand_circle_down Q&As

Can I double up on the insulation?

Yes, you can do two layers of the EcoQuilt Expert Insulation. We recommend using a 25mm wooden batten over the first layer of insulation and attaching the second layer to the wooden battens. Or if the rafters of your loft are long enough you can recess the first layer of insulation into the rafters and then the second layer can sit across the rafters.

What should I use to cut the insulation?

In this kit, we provide a pair of 10” multifoil insulation scissors which are perfect for the job.

Do I need to overlap the insulation?

Yes, you do need to overlap the insulation otherwise you won’t get the best thermal performance. We don’t recommend taping and sealing the insulation in this application so overlapping the insulation will stop any draughts from getting in and warm air from escaping.

Will the foil insulation cause any problems with damp?

No, actually this will help prevent damp and mould and it’ll help reduce the risk of condensation.

Do I need any specific PPE to complete this job?

No, you don’t need any protective clothing, masks, or safety goggles as there are no harmful fibres in the insulation.

Can I board over this insulation?

Yes, you can board over this insulation by adding wooden battens over the top of the insulation and attaching what you’d like to board over with to the wooden battens.

expand_circle_down Reviews

1 review for Under Rafter Insulation Kit

  1. Hazel C. (verified owner)

    Ordered on Friday, delivered Monday. Great Service

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