Aluminium Secondary Glazing

Offering superior noise reduction, ideal for conservation and listed properties.

Strong, reliable, long lasting and unobtrusive

Perfect solutions for heritage and conservation

Often, the only way to retain the external character of a period property is to use secondary glazing. Our designers can ensure that slimline aluminium sections will sit discreetly behind your window frames, preserving the original look.
 
Our aluminium secondary glazing offers increased thermal insulation, enhanced sound insulation and improved security, as well as reducing condensation.
 
The most popular options are vertical and horizontal sliding, however, hinged, lift-out or fixed units, can provide an alternative solution.
AVAILABLE TO VIEW AT OUR SHOWROOM Download Brochure

The Firmseal process

We pride ourselves on offering the very best experience for our customers throughout every stage of the process.
Known fondly as the “Firmseal experience".


From quote to installation, we make it easy for you!

"We had dealt with Firmseal in the past. Came over and looked at showroom, was impressed, staff so helpful, everything went smoothly from start to finish. So nice to get to speak to a person at the end of the phone. Thank you to everyone."

Mrs M – Windows, Yeovil

FIRST CONTACT

CONSULTATION

DETAILED QUOTE

SURVEYING & PREPARATION

INSTALLATION

SIGN-OFF & PAYMENT

reviews

What our customers say

Don’t just take our word for it. Hear what our customers have to say!

Excellent product & better value for money than competitor brands. Customer service has also been very impressive. We love our new windows.

Mr & Mrs T

Alitherm, Yeovil

Completely satisfied, you came recommended by my sister who has had various work done by yourselves.

Mrs C

Back Door, Yeovil