We had the bi-glass and draught sealing product in...

We had the bi-glass and draught sealing product installed a few years ago and I have to say that it provides very little insulation. It s not cheap and great claims are made but the product really doesn t perform. If you want to get decent double glazing then go down the proper route.

Responding to owner.

Well just because you have no poor reviews doesn t mean there are no other dissatisfied customers. It s not a relative issue either - I m not comparing to other rooms where full windows were fitted. The bottom line is that they do not provide much insulation in our case - compared to the 4.8 U rating we started with. Maybe the fitting was just poor.