Windows and doors
Suspended-film insulating glass windows - A definitive guide for these high-performance windows
...cost less, and be easier to transport and frame. And you can add more insulation by adding more film layers: the Canadian manufacturer of suspended-film glazed units, LiteZone Glass Inc, claims an R value of 17 for 8 layers, which is very practical for high-humidity rooms. such as bathrooms and kitchens.
This can also...