• Beautiful Sash Windows
    Enjoy warm home with high
    performance Alumatherm Windows.
  • FREE AS STANDARD:
    ● A rated
    ● Toughened Glass in both panes
    ● Sash Horns
    ● Selection of hardware locks and furniture
    ● Choice of flush cill thickness
    ● Price promise without hidden charges
  • Alumatherm offers traditional charm
    & leading thermal efficiency.
    Great prices without hidden costs!
    What we call standard and comes FREE
    as standard others call additional options!
  • Installation service available
    through a network of experienced installers.

Favorite architects choice and professional solution now available to you! Ideal for period and modern properties Alumatherm - aluminum sash window.

Best kept professional solution.

Aluminium sash windows Alumatherm are incredibly beautiful with leading thermal efficiency.


Customer Support

If there is something you would like to ask, please just give us a call or request a call back.

Make an Appointment

Installation service available through a network of experienced FENSA installers.

Download a Brochure

Have a look through all the amazing features and benefits of Alumatherm windows.

Step by Step Guide

Purchasing windows can be confusing; step by step guide will help you purchase the best for your money.

Gallery of installations

Browse through our installation gallery and have a look how many people have trusted Alumatherm.

Guarantees & Accreditations

We are the manufacturer of Alumatherm windows not a reseller as many others are, our guarantees and accreditation mean what they say.