Slim, elegant, efficient

AG210: A+10 metal windows & doors from Met Therm

Handmade by our skilled craftsmen, Part L 2022 & Part Q/PAS 24 compliant for New Builds and replacements.

Ideal replacements for Crittall^®* windows & doors

Enjoy all the benefits of the slimmest thermally broken A+10 rated metal windows, including their distinctive style and traditional features. Our metal frame windows are ideal replacements for steel casement windows including W20, W30, W40, W50, SMW windows.

A+10

Rated energy efficiency

Part L 2022

New Build Control compliant

Part Q/PAS 24

Security options available

10 years

Guarantee available with us**

AG210 Metal Windows from Met Therm

Met Therm’s windows enhance the style of your property, be it traditional or contemporary. Our double-glazed metal windows are the slimmest thermally broken ‘A+10 Rated’ product on the market. This gives you the look you want without compromising insulation or energy efficiency.

Energy efficient ‘A+10 rated’
Windows suitable for New Build Control Compliant to Part L 2022 & options for Part Q/PAS 24 security
Multipoint locking as standard
Polyester powder coated frames
Up to 10 years guarantee**
Expertly manufactured by Met Therm Windows

Find Out More

Our process

Design

Tell us about your property, your existing windows and the look you want to achieve. We’ll provide a free, no-obligation quote and help you choose suitable frame styles, glazing details, colours and hardware.

Manufacture

Your AG210 windows are handmade by Met Therm’s skilled craftspeople, with welded corners, slim sightlines and a powder coated finish, designed for you.

Install

Our experienced installers fit your windows with care, helping you achieve a secure finish that complements your home.

Metal windows & doors from Met Therm are perfect for:

Leaded

Cottage pane

New Build

Replacement steel windows

Features and specs
AG210 range

Energy efficient ‘A+10 rated’
Windows suitable for New Build Control Compliant to Part L 2022 & options for Part Q/PAS 24 security
Multipoint locking as standard
Polyester powder coated frames
Up to 10 years guarantee**
Expertly manufactured by Met Therm Windows

AG210 metal windows from Met Therm

Find out more

Our products

Explore more information about Met Therm’s AG210 windows and doors, including their energy efficiency, customisable design, compliance and further benefits.

Metal windows

Metal doors

Why choose Met Therm Windows?

No need to compromise

Our unique AG210 range ensures you can maintain the beautiful aesthetics of your character property whilst improving thermal efficiency, security and reducing maintenance.

Service excellence

Our family run team have years of experience in the replacement steel windows industry and are passionate about metal frame windows and doors. We pride ourselves on our personal service and attention to detail.

Bespoke choices

Windows from Met Therm can be customised. Choose from a range of hinges, handles, glazing, frame colours, including dual colour for the perfect look inside and out.

Expert installation

Our expert window and door installers have years of experience fitting our AG210 products on a wide variety of projects. Whether it’s replacing old steel frame windows and doors or installing into New Builds our installers have the expertise.

Speak to us today about your project

Let’s chat

Window FAQs

Have any questions? Find the answers to all your questions related to Met Therm’s AG210 windows here.

Are AG210 windows suitable for replacing steel windows?

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.

Are Met Therm windows energy efficient?

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.

Can I customise the frame colour?

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.

Are AG210 windows suitable for new builds?

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.

Do AG210 windows look like traditional steel windows?

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.

Are Met Therm windows secure?

AG210 windows include multipoint locking as standard. Increased security designs are also available to help meet Part Q/PAS 24 requirements where needed.

Is Met Therm a FENSA-registered installer?

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.

What our clients think

“Our new windows have made a huge difference to the warmth and energy efficiency of the house; and aesthetically, it is exactly what we were looking for. We wanted the windows to look like the originals, and they do. In fact, we’ve had visitors who haven’t even realised we have had them changed – a perfect validation that Met Therm Windows was the right choice.”

Michael and Christine

1920’s home

“They were really quick and there was no disruption at all. The internal door took the longest and they did brilliantly with the windows because the houses around here are so old and the walls aren’t straight. But they made everything fit perfectly and the overall look is brilliant.”

“The quality of their work is amazing. The installers did such a good job, and they were so clean and tidy, nothing was too much trouble.”

Janet

Victorian mid-terrace

“The process of working with Met Therm was brilliant – and easy. They came out equipped with samples, did a site survey and took measurements off plan. They were also really helpful as they gave some great recommendations when it came to deciding how many openings to have.”

“Because we were both replacing windows and installing windows into a new build there were definite deadlines which had to be met, such as getting the property watertight. Met Therm happily liaised with our builder and pulled out all the stops to ensure this happened.”

Claire

1930’s home