what is R factor? how do you have UV on the windows? ; l& M- R' ^( x$ R' o" s3 h( S( vChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.4 F& p8 w, |$ w2 p+ O4 W
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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. : r) f U" {* ^ . y% U9 C0 d( d1 T8 `* B& oHowever, 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 $ W! q; W0 z' L5 c' ^4 F" h/ B
R factor is used to determine insulation capability. " k' z3 A8 w/ e0 t; f, r " b" c; r- W5 T6 P; M( MHere 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. 3 r5 G3 @$ ?/ X1 R$ p X' e! j! R ... * |& a+ ^$ M7 j; i: h3 r小黄 发表于 2011-2-18 09:06
; ?: z5 L5 g d) _! P4 W7 [( _1 A0 [Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 5 Z! [9 R# S* Y. g" v- [ChiaPet 发表于 2011-2-18 09:09
) Y3 N8 F, F2 D1 _Ask your builder to give you an exact quote. 8 h$ ]" F* h: K% C3 H TYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.2 C1 U4 M9 ], \- |$ P( W1 b! [
You don't have to upgrade all the windows. Only the important ones. / }2 X& L0 y- x3 D7 s小黄 发表于 2011-2-18 09:13
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it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.