what is R factor? how do you have UV on the windows? ; C; y7 @" O! ~% sChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. 1 Q& b, |- s- j, Z) @, F: ]" F4 b+ y: ?0 f/ e9 L
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. ) a# A; Y( \! ]# J$ `! _) ?; V! s. ?8 c
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.
R factor is used to determine insulation capability.1 N2 |- r* e" u4 q6 I
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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. 0 d: H+ K2 W# r# K ...8 J) A. w0 |, C! ~
小黄 发表于 2011-2-18 09:06
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Thank you for your reply. But would sun-stop coating cost too much?
Ask your builder to give you an exact quote.6 Z0 u! n' W& p* x& m' y9 `
You don't have to upgrade all the windows. Only the important ones.% g: k- M. G$ F) u$ H
小黄 发表于 2011-2-18 09:13
0 c* N2 D% d9 y V+ _7 h- [ ! i/ W9 A: y$ ~' tit must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.