Case Study:

Corwen Old Police Station

Main Contractor

Self Build

Project Type

Grade II Listed Conversion

Project Value

Self Build
Corwen Police Station

The Project

Built-in 1871 as a police station with four cells and accommodation for the constable and his family.

This imposing Grade II Listed property has been renovated to combine the best of traditional materials and craftsmanship, with new technologies.


The Problem

Achieving the target U values without adding too much thickness so the period features could be retained.

How We Helped

Caroline and Peter approached SuperFOIL  to find solutions for their project and they chose SuperFOIL SF40 to bring the property up to the high thermal performance they required. SuperFOIL offered solutions to exceed the required u-values under building regulations. Caroline chose 2 layers of SF40 in the roof area to achieve 0.14 and a single layer of SF40 in the walls to achieve 0.23 keeping the structure thin enough to retain the period features that were so important to this historic building.

We help 1000's of customers every year

Here are just a few of the comments we've received...

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Loft Conversion

Actually, I bought Superfoil for my small extension and I must say easy to install and it works, room is comfortable better than Kingspan. Now looking at installing an underfloor in my daughter's house. Thanks!

Duncan Walker

Conservatory Conversion

I'm really grateful for all the info you've provided, many thanks. To be honest I didn't think your stuff is as good as it clearly is, and we'll definitely be using it in the future. Can I ask a favour and ask you to calculate two more please?

Carl Bell

Self Build

In the past, I used SF19 for thermal insulation of the roof. I have the best experience. I'm thinking about insulating the house outside wall. As I want to be clear, I will definitely call. Many satisfied customers wish.

Jiri Milfait


We’re delighted with the thermal improvements after fitting Superfoil SF40. The system was clearly and helpfully specified, simple to install and immediately felt warmer, despite this also being the Winter of Beast from the East. It suits our 200 year old house, now heated with a modern, green air source heat pump.

Tim Clements

Senior Building Control Surveyor

Many thanks for all your assistance with this matter, you have been very helpful. The information you have provided has been very useful to one of our customers and I am now more familiar with this type of double fit of SuperFOIL as a suitable method of achieving compliance with The Building Regulations.

Donna Worrell

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