CERTASS Approved Installers in Bristol, Bath, and surrounding areas.

As CERTASS-installers, you have complete confidence that our double glazing installations strictly follow the latest Building Regulations, ensuring absolute safety and better levels of thermal efficiency across the board. Sourcing all of our uPVC windows, aluminium windows and door systems from the best local manufacturers, we can guarantee a smoother, faster, and more cost-effective process with limitless custom design possibilities.

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Full white residence collection windows installation

What makes us different from the other double glazing installers in Bristol & the South West?

Aluminium windows interior view
Dual grey aluminium bifold doors

High performance, bespoke building work in Bristol, Bath, and surrounding areas.

From one window replacement to entirely replacing all the doors in your home, all of our installations are bespoke builds. Committed to utilising building products that have been manufactured to the highest standards to comply with all the latest British and/or European safety standards, you can trust our installations to deliver the highest quality and long-lasting performance far into the future.

Our window and door manufacturers enforce an innovative quality policy to ensure the production and supply of the highest quality Spectus uPVC windows and doors and premium Smart Aluminium systems. Dedicated to installing high performance, stylish and secure home improvements, we are here for you throughout the entire home improvement journey - from design right through to aftercare and everything in between.

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40,000 Sq Ft Factory Site In Bishopsworth, Bristol

At DM Window Installations, we source all our uPVC and aluminium window and door systems from the best local window and door manufacturers in Bristol. At the cutting edge of window and door manufacturing, their journey began fabricating commercial and residential aluminium windows and doors using the industry-leading Smarts System back in 1983. Moving with the times, in 1985 they added the full suite of uPVC Spectus Systems to their product range and now manufacture in excess of 500 uPVC frames per week.

Enforcing a company quality policy that ensures the production and supply of the highest quality home improvement products, our core values are firmly aligned.

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Factory worker assembling PVC doors and windows

uPVC and aluminium window & door factory in Bristol

Your happiness and loyalty mean everything to us, which is why we strive to offer the very best selection of glazing and home improvement products around. With this in mind, our in-house manufactured products include:

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Light oak effect residence collection windows interior view
Speech Mark

A quick and quality installation. They matched a new UPVC window to our existing wooden windows and you can’t tell the difference from the outside!

Daniel, Bristol

Modern black flush sash windows installation
Speech Mark

I can highly recommend DM Windows – a great job from start to finish on my lovely new windows and doors! Professional, helpful and friendly staff.

Sindy, Bristol

Open blue composite door

Ready to discuss your next project?

From straightforward window and door replacements to bespoke building work, we will do everything we can to create the home of your dreams as quickly and as smoothly as possible.

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Distinction Doors
Residence Collection