Double Glazing in Devon, Cornwall, Dorset & Somerset
A-rated sealed units, fitted by a small local team. Honest quotes, 10-year guarantee, no high-pressure sales.
Warmer, quieter, cheaper to run
Modern double glazing can improve comfort and reduce outside noise compared with single glazing. The result depends on the existing windows and the specification chosen.
We install uPVC, aluminium and timber-effect double-glazed windows across the South West, with argon-filled sealed units and warm-edge spacers as standard. Every project is surveyed in person and quoted in writing — no estimates over the phone, no upsell scripts.
Double glazing in your town
We fit double glazing across Devon, Cornwall, Dorset and Somerset. Local pages with property-specific guidance:
Frequently asked
What does double glazing actually do?
Two panes of glass sealed with an argon-filled cavity dramatically cut heat loss, condensation and outside noise compared to single glazing — typically lowering heating bills by 15–25% in older South West homes.
How much does double glazing cost in Devon, Cornwall, Dorset or Somerset?
For a typical 3-bed semi we usually quote between £4,800 and £8,500 fully fitted, depending on frame material (uPVC vs aluminium vs timber-effect), glass spec and number of openers. Every quote is itemised — no high-pressure sales.
uPVC, aluminium or timber-effect — which is best?
uPVC is the best all-rounder for value and thermal performance. Aluminium suits modern extensions and slim sightlines. Timber-effect uPVC is ideal for period properties where appearance matters.
How long do double-glazed windows last?
A quality A-rated unit installed correctly should last 25–35 years. Seals usually outlast frames in our region — coastal salt is the main accelerant, which is why we fit marine-grade hardware as standard near the coast.
Can I keep my existing frames and just upgrade the glass?
Sometimes — if the frames are structurally sound we can replace just the sealed units. We'll always tell you honestly whether that's worth doing or whether full replacement makes more sense.
Frames still in good shape?
If your existing double-glazed frames are structurally sound but tired or the wrong colour, our on-site spraying service can refresh them in any RAL for a fraction of replacement cost.
More about double glazing
Double glazing windows and doors
Double glazing is not only for windows. Patio doors, French doors and front doors with glazed panels all use sealed units, and replacing them at the same time as the windows keeps the colour and frame style consistent across the house.
Read more: Replacement windows · uPVC windows
Glass and seals
A double glazed unit is two panes of glass separated by a spacer and sealed around the edge, with the gap usually filled with argon. When the seal fails, moisture gets between the panes and the window mists from the inside. If the frame is sound, the sealed unit can usually be replaced on its own, which is quicker and cheaper than a new window.
Read more: Misted double glazing: repair or replace · Why windows mist up
Cheap versus best double glazing
The best double glazing for your home is the one that matches the property and is fitted properly, not necessarily the most expensive. Cheap double glazing usually saves money on the sealed unit, spacer bars, hardware or the installation itself, which is where long-term problems start. Ask for quotes per opening and compare the specification line by line.
Read more: Double glazing costs explained
Double glazing by area
We are based at Cranbrook near Exeter and fit double glazing across Devon, Cornwall, Dorset and Somerset. For our home city, see our Exeter double glazing page.
Read more: Double glazing in Exeter · Areas we cover
Double glazing in Exeter, Plymouth and Taunton
We have separate pages for three of the larger places we work, each looking at the housing, planning and weather that matter for windows there.
Read more: Double glazing Exeter · Double glazing Plymouth · Double glazing Taunton
More questions
Can you replace just the glass in my double glazing?
Often, yes. If the frame and hardware are sound, a misted or cracked sealed unit can be replaced on its own. We check at the survey.
Do you fit double glazed doors?
Yes, including patio and French doors in uPVC or aluminium, matched to your windows.
Double glazing guides
Ready to start your project?
Free quotes · 10-year guarantee · Friendly local service.