what is R factor? how do you have UV on the windows?* w$ w. ^. N5 C' V2 ]
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. 1 N K2 r7 |: r }3 H( } O. C/ _* s& @* Q6 ^5 {1 X% n2 n" z( m
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.. u/ {8 n0 z. l' l w
/ a$ K, D8 G+ B3 {* q4 m, f6 }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 ' ^% C: s4 z ^; u
R factor is used to determine insulation capability." n1 _4 V4 N" m# g# X: O V& L) R
5 a M( o9 W4 p" iHere 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. % Q% k. w+ N1 t ...) |6 h( E/ s( U# d; h* Z
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?0 t0 ?+ M1 n3 |$ t* Q
ChiaPet 发表于 2011-2-18 09:09
* K1 n3 w* R2 Y B! @Ask your builder to give you an exact quote.0 i: [. x& X4 P' @* Y! E% R# M
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. ; Q) c- U& A# H1 NYou don't have to upgrade all the windows. Only the important ones. & s' i& k' g, ~- K8 v p小黄 发表于 2011-2-18 09:13