what is R factor? how do you have UV on the windows? ( n/ s% P3 p9 B& W. AChiaPet 发表于 2011-2-18 08:53
# S- t: v" |- ^/ U6 S iR factor is used to determine insulation capability. " m" d5 M' y$ Z' T8 c2 h0 j* m4 C+ W& d& X4 Q+ k
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. j# T( C) q0 A: ^$ t
6 U% u9 e& K$ R" E3 jHowever, 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 3 }4 x% m; `% \0 z& c# ]. Z
R factor is used to determine insulation capability. 2 H8 Z: z* F# X& R: W7 l4 Y& R4 c $ y/ s% n; ^$ n6 C& KHere 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. ; {6 K7 e5 `8 W: a+ s* T+ |" x( a ..." o" |/ ]8 v+ Z. T( O) f( [
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? 2 t v- ^1 U( w+ w' e9 d7 sChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.& o: R$ v F& b7 ^2 j' Y" ?
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote., ~3 j7 _$ O- I9 i, b
You don't have to upgrade all the windows. Only the important ones. 4 w5 ^; L: k4 A% ^小黄 发表于 2011-2-18 09:13