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Thermaspec UK is one of the South’s leading installers of windows and doors. Using state-of-the-art manufacturing processes, we are able to design and install a product that is perfectly suited to your home and your budget. With an unbeatable range of colours and styles available, your home will be warmer, more secure and will look good.

Windows play an important role in keeping heat inside your property. Upgrading your old timber or uPVC windows to our energy efficient frames is a straightforward way to save money and reduce your carbon footprint.

Our state-of-the-art A-rated windows help to keep you warm, reduce noise infiltration and eliminate damp and condensation issues.

Windows built to last

Our quality window frames are built to the highest standard and meet all of the latest industry requirements and regulations, so you can have peace of mind knowing that your windows were designed and built to last. This is backed by our insurance backed guarantee.

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Windows available in our range


Aluminium Warmcore Windows

Built around a belief that beauty doesn’t have to compromise performance, WarmCore aluminium windows were created out of a desire to combine the desirability and durability of aluminium with unparalelled insulation.

With clean, modern lines, WarmCore creates windows with a refined and understated beauty.

Bay and Canopy Windows

Bay windows can be installed into nearly any window space. With that little bit of extra room, it can make all the difference to adding depth and light to your home.

With so many types of bay styles, sizes, shapes, canopy options and glass designs to choose from, you’ll be spoilt for choice. So whether you’re looking for a subtle curve or grand canopy our...

Casement Windows

Our range of casement windows offer security, energy efficiency and are available in a multitude of styles and finishes to enhance the look of your home.

Whatever style you're looking for, you’ll find our casement windows aren’t just pleasing on the eye, they’re practical too. Minimal maintenance means their good looks will last well into the future.

Fully Reversible Windows

Unique in their design, these windows are easily distinguishable by their sash that can be completely rotated to allow for easy cleaning and varying levels of ventilation.

Fully reversible windows are the perfect solution for high-rise buildings looking to increase airflow, whilst adding light to your property and adding a clean, neat finish.

Tilt & Turn Windows

These dual-purpose windows are a versitle and practical solution for those looking for the ability to securely ventilate their property, whilst also being able to open windows entirely when needed.

The modern, simplistic visual design of the tilt and turn window work perfectly in modern homes as well as adding a...

Secondary Glazing

Thermaspec specialise in insulation solutions, offering property improvement expertise all over the South of the UK.

Our Secondary Glazing services are not only the most effective around, they are also the most environmentally friendly option, at the most affordable price on the market.

uPVC Windows

Thermaspec are the number one supplier of uPVC windows on the market. Our reputation for providing the highest quality, flawlessly finished uPVC windows in Poole is second to none.

We’re not tied to any one manufacturer; therefore allowing us to ensure that each of our window solutions are bespoke to your home and your budget...

Vertical Slide & Sash Windows

Common in older properties, these windows are made up of two sashes that slide up past each other to give a touch of quality and elegance to your home. Traditional features such as Georgian bars, finch locks, and external horns are available to complement the traditional look of your home.

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