what is R factor? how do you have UV on the windows? I% c( _# S' M. X SChiaPet 发表于 2011-2-18 08:53
, n1 J. A. W% V8 u" {: c4 GR factor is used to determine insulation capability. 1 R3 ?- i2 q; [$ C0 \( g% z0 J. V% x1 {$ B! l( L1 `
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.3 d' r5 s" v' K0 S- s/ s
, ]5 w. v+ I4 {' E8 S9 k* zHowever, 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 $ T" _$ l/ v' w T5 Q& r; k. p
R factor is used to determine insulation capability.- X, w, j+ s5 R5 I/ q- }
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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.. z2 ?7 T2 j; Y9 Q2 G2 V$ G
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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?
would sun-stop coating cost too much?5 f2 ?! x. D5 v% @
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.1 A" v- o3 ]" k. |' ^0 `
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.$ F) v# p1 ^. G8 r( j) G S
You don't have to upgrade all the windows. Only the important ones. * X: T& r( C9 a/ I/ f小黄 发表于 2011-2-18 09:13