Quality you can see. Service you can trust.

From sash windows to composite doors, we design, supply and install everything you need to transform your home with certified quality and tidy workmanship guaranteed.

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Our Home Improvement Services

Windows
Windows-1

Windows

Energy-efficient uPVC & aluminium in casement, sash and tilt & turn styles—tailored to your home and fitted with care.

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Doors
Doors-1

Doors

Durable uPVC & composite front doors, plus French, patio and bi-fold options—secure, stylish and low-maintenance.

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Conservatories & Orangeries
Conservatory-1

Conservatories & Orangeries

Design & build solutions with tiled, glass or lantern roofs for light-filled, year-round spaces.

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Conservatory Roofs & Roofline
Roof

Conservatory Roofs & Roofline

Warm, insulated replacement roofs plus soffits, fascias & guttering for a neat, long-lasting finish.

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Soffits, Fascias And Guttering
Guttering

Soffits, Fascias And Guttering

We offer full replacement soffit, fascias and guttering to your home that is fitted with care.

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Porch Installations
Porch

Porch Installations

Enhance your home's charm and functionality with professional porch installations that blend style, durability, and comfort.

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Looking To Transform The Kerb Appeal Of Your Home?

From heritage sash windows with authentic sightlines to slimline aluminium frames and bold composite front doors, we help you create the look you love without the hard sell. Our smart, efficient techniques ensure a seamless transformation warm, quiet and comfortable all year round.

Built To Last, Backed By Guarantees

We don’t cut corners. Careful surveys, certified installers and quality materials mean fewer issues and better long-term value. If anything needs attention, we’ll put it right quickly and courteously—that’s the benefit of choosing a local, family-run team.

10-Year Frame & Workmanship Guarantee
5-Year Glass & Hardware Cover
24-Hour Response

Want To Save On Your Electricity Bills?

Every Thermaseal window is supplied and installed to A-rated energy efficiency as standard, using multi-chambered profiles, low-emissivity glass and warm-edge spacer bars to keep heat where it belongs. Frames are precisely measured for an airtight fit, with advanced seals that cut draughts and outside noise. Doors are built to the same high thermal standards, and our warm, insulated conservatory roof upgrades dramatically improve year-round comfort. 

A rated

Transforming Homes in Nottingham & The Surrounding Areas

We focus on local homes so we can survey quickly, fit precisely and support you fast if you ever need us. Typical areas include Nottingham, Beeston, West Bridgford, Arnold, Carlton, Hucknall, Mapperley, Stapleford, Long Eaton and surrounding neighbourhoods.

Request Your Free Quote Today

Request Your Free Quote Today

Frequently Asked Questions

Are quotes and surveys free?

Yes—free and no-obligation. We usually respond within 24 hours to book a convenient time.

What are typical lead times?

Lead times vary by product and season. We’ll include an estimated installation date with your quote and keep you updated.

Are your products energy efficient?

Yes—A-rated windows as standard, with options for triple glazing and warm, insulated conservatory roofs.

 

See the Difference

Our installations speak for themselves transforming tired, draughty windows into stylish, efficient upgrades.

Customers Rate Us Highly

Explore recent installations from sash window upgrades to warm roof conversions and see how thoughtful design and careful fitting can transform your home.

Reviews
4.9
★ ★ ★ ★ ★
30 reviews
★ ★ ★ ★ ★
Replaced 30 year old windows!! Excellent service. Prompt and efficient. Fair price too.Left clean and tidy inside and out.
— Sharon Walker
★ ★ ★ ★ ★
Brilliant local company. Honest, reliable, quick and efficient service. Wonderful team of lads throughout whole process from enquiry to fitting. Would definitely recommend ..
— Jennifer Watson
★ ★ ★ ★ ★
Replaced patio doors. Excellent workmanship. Great couple of lads. Upvc doors are very high quality made. Would recommend 👍👍👍👍👍
— Rhbzuk
★ ★ ★ ★ ★
George and everyone we’ve dealt with at Thermaseal have been a pleasure to do business with. They worked together, as a great team, to look after our needs; from sourcing quality products, to installation, and after-sales care ....
— Colin Failes
★ ★ ★ ★ ★
Excellent service. They arrived promptly and did a wonderful and neat job of the new window. Paul was happy to assist with further information which we required. A great team, ...
— shaila gallagher
★ ★ ★ ★ ★
Thermaseal replaced two bay windows and two casement windows for us and we would highly recommend them. They were a pleasure to deal with from start to finish, very professional and friendly. They gave us the best quote out of ...
— Kate M

Customers Rate Us Highly

Explore recent installations from sash window upgrades to warm roof conversions and see how thoughtful design and careful fitting can transform your home.

beaner-image Rating
4.5
140 reviews

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