Can all aluminium window frames be retrofitted with double glazing?

For the most part, aluminium window and door frames can be retrofitted, and the outcome may have you looking hard to try and spot the changes. This is because the process makes use of the design of your existing window frames.

In keeping the existing frames a significant saving is made when compared with full replacement (this can be anything from 30% and in some cases over 50%). It also means the process is much less intrusive.