About us
Met Therm is a family-run business on the Hampshire/West Sussex border. Our dedicated team draw on extensive experience within the replacement steel windows industry to meet the needs of our customers.
Welcome to Met Therm Windows
Recognising the distinctive and coveted features of steel windows and doors, we have designed and manufactured a composite aluminium product which solves the problems traditional and period windows can create.
Our product reflects our commitment to quality. It offers residential customers an opportunity to enjoy the benefits of a modern window that is almost indistinguishable from the original.
You can personalise our products by selecting hinges, handles and paint finish to ensure an authentic replacement, every time.
We’re happy to discuss your specific requirements and can tailor our products, where possible, to meet your needs.
16 years
Experience in the industry
A+10
Rated energy efficiency
23mm
Ultra-slim frame profiles
10 Year
Guarantee available with us
Available in a range of styles
At Met Therm Windows, we provide a wide range of doors and windows including a variety of metal windows, period windows and bespoke windows.
Whether it’s metal windows or doors you’re looking for, we pride ourselves on providing high-quality products and fantastic service.
Our products in action
From a Victorian house being transformed to improve energy efficiency to the benefits metal frame windows have on a 1930s family home, explore our previous projects.
Window FAQs
Have any questions? Find the answers to all your questions related to Met Therm’s AG210 windows here.
replacing steel windows? Yes. AG210 windows are designed as an ideal replacement for traditional steel casement windows, including W20, W30, W40, W50 and SMW-style windows. They recreate slim steel-style sightlines while offering modern thermal performance.
Yes. AG210 metal windows are A+10 rated and use thermally broken frames with 24mm double glazing. This helps reduce heat loss while keeping the slim, traditional appearance of classic metal windows.
Yes. Met Therm offers a wide choice of RAL Classic colours, along with matt, semi-gloss, gloss and selected special finishes. Optional dual colour coatings are also available, allowing a different finish inside and outside.
Yes. AG210 windows can be suitable for new build projects as well as renovations and replacements. The range is Part L 2022 compliant, with Part Q/PAS 24 security options available where required.
Yes. The AG210 range is designed to recreate the look and feel of original steel windows. Options include slim frames, welded corners, traditional hinges, peg stays, leaded panes and cottage pane designs.
AG210 windows include multipoint locking as standard. Increased security designs are also available to help meet Part Q/PAS 24 requirements where needed.
Yes. Met Therm Windows is a FENSA-registered installer. For replacement projects, they can arrange for the necessary building control certificate to be issued when the project is completed.
Discuss your needs today
Whether you have steel windows or traditional period windows and are looking for an alternative to replace them, speak to us about your project.