It’s the buzz phrase going about just now. SRJ’s windows really will make a difference to any home, combining our state of the art frames with the latest of technology in glass it’s the way forward in reducing your heating bills. Depending on the size of your property and existing insulation will depend on how much ££ you will save. It can be anywhere between £170-£500 we estimate. So over the years your windows will pay you back in heating bill savings.