Swift Frame is introducing a new thermal insert – made of recycled PVC-U – that will improve the energy efficiency of its self-extruded windows with a U value of 1.2. 

The company is also said to be currently investigating the potential of insulating gaskets that have the potential to deliver even lower U-values.

Sales director, Jason Scrivens, commented: “Environmental awareness has exploded over the last five years. Governments, councils, businesses and homeowners are more concerned about climate change than ever – and as the clock ticks on the UK’s ambition to reach net zero by 2050, that’s only going to increase in the decade ahead.

“Our new thermal insert is a small development in itself, but it’s part of a broader picture. We want to arm our valued customers with the outstanding products they’ll need to thrive in the net zero age.

“It’s by constantly looking for marginal gains like these that we’ll produce windows that aren’t just stylish and long-lasting, but sustainable too.”