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CosyGlazing – virtually invisible secondary glazing for period homes and listed properties


CosyHome Company are specialists in the installation of our unique Cosy Glazing system of Secondary Glazing. CosyGlazing is an Ultra high performance virtually invisible Secondary Glazing solution for original windows of all types and sizes with enhanced sound proofing and UV protection. Our secondary glazing is an ideal solution for reducing draughts in period homes and listed properties. We are based in the heart of the South West which allows us to cover from Truro through to Bristol, Dorset, Wiltshire and beyond.

Cosy Glazing at a glance;

•  can reduce heatloss from single glazed windows by 70%
•  can fit to every type of window so that you can open your windows as usual
•  is approved for Grade 1 and Grade 2 Listed Buildings
•  can reduce noise by similar amounts to Double Glazing
•  is made from Plexiglas, which is used for airoplane windows.
•  is virtually invisible, ideal for sash windows

Download Historic England Secondary Glazing Report


Reduce Heat Loss and Energy Bills

CosyGlazing is made of plexiglass – a modern, lightweight equivalent to glass – and fixed using magnetic strips, it is easy to remove for cleaning. It can be supplied in white or with a wooden frame to complement your property.

Unlike conventional secondary glazing, which has a large aluminium frame, CosyGlazing mounts directly on to the opening window sashes, making it virtually invisible from the inside or outside, and allowing you to open your sash or casement windows as usual.

“Just wanted to drop you a line as soon as possible to let you know how pleased we are with our secondary glazing: we knew it was going to be good but it has far exceeded our expectations! You really do not notice it is there…. [when] the CosyGlazing was fitted it felt warmer immediately and those rooms have now kept a similar temperature to the rest of the house which has never happened before”

Eileen, Chelmsford Jan 2016

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Frequently Asked Questions

Is it Eco Friendly?


CosyHome insulation is quick to install with little disruption to your home. It is eco friendly – the energy used for the installation is saved in around three months – so it works equally for you and the planet.


Will it reduce my bills?


The CosyHome Package of window, draught and loft insulation costs between £3,000 and £5,000 for an average home and often pays for itself in 4-8 years, representing a financial return of 15-25% per year.


Where do you cover?


We are based in North Devon in the heart of the beautiful South West. We can supply our draught proofing systems to owners of country homes and traditional period properties in the South West, including Devon, Cornwall, Somerset, Dorset and Wiltshire as well as across the UK.


Can I get A Free Survey?


To obtain further details about our packages of energy saving solutions, or to arrange a consultation to discuss your requirements, please get in touch. We will visit your home at your convenience to show you samples, explain our system and discuss your own specific requirements.

Do get in touch with CosyHome today to discuss how we can help you to save energy and reduce heating bills by making your property more energy efficient with our CosyGlazing, Loft Insulation and Draught Proofing systems. We’ve already insulated more than 120 beautiful period homes, and our customers are delighted.

“We are stunned by how fantastic the CosyGlazing is in terms of additional warmth, keeping out the drafts and also sound-proofing.” Tom, Bath.

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