what is R factor? how do you have UV on the windows?' ?8 k5 N6 \1 l
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. * ]' q+ x( P' y6 ?+ [3 Q8 Z, s; } `0 P: ^7 b5 QHere in Canada, walls are well over R20. So, even if the exterior walls are hot under sunlight, it won't really affect interior living space. ; ]2 v8 ?# S& ^5 \2 i9 f1 L! F ! K+ ]+ a, A6 H! U5 E; `& |However, windows have lower R factors and allow UV radiation (and radiation of other frequency) to enter the house. So, it's best to upgrade your windows, if radiation (i.e. sunlight) is a potential problem. Typically, you can upgrade your windows to triple pane, with sun-stop coatings on both sides.
本帖最后由 ChiaPet 于 2011-2-18 09:12 编辑 2 i$ e e2 S8 M3 T# C, p' ^" t
R factor is used to determine insulation capability.% T+ d$ X |( N# Z
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Here in Canada, walls are well over R20. So, even if the exterior walls are hot under sunlight, it won't really affect interior living space.* F5 u5 I- i" i7 T1 E0 n0 `
... 0 V4 ]' Q6 W6 i m0 \小黄 发表于 2011-2-18 09:06
' M6 I7 [3 c/ j/ a7 k2 oThank you for your reply. But would sun-stop coating cost too much?
Ask your builder to give you an exact quote.* }! J* V/ K6 e% f) }" h+ D/ V
You don't have to upgrade all the windows. Only the important ones.% J, V# w) k( a
小黄 发表于 2011-2-18 09:13
请问:主卧,客厅和饭厅朝西, 车库和bonus room朝东好吗?朝西晒的房间,夏天很热吗?) H. S, U( J8 F1 R
ChiaPet 发表于 2011-2-18 08:00
3 b; C: \* _, ]* G" e. R& _ + ]( ]. v7 o, o8 _" k" uit must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.