what is R factor? how do you have UV on the windows?# K1 _8 t; w; B6 g* I: y
ChiaPet 发表于 2011-2-18 08:53
& ~* S% v) k& i# t: U( S3 i8 IR factor is used to determine insulation capability.8 L- o4 L( N6 l4 @* {1 ?6 i, r
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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.) h6 h! k+ ]; p) T$ ^
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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 ) [ j7 h7 M. D X& _$ ^
R factor is used to determine insulation capability.$ D% N7 ]0 H$ D* J3 N& G
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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.3 J& w6 L( @$ q, \
... ) W! `8 y3 ]: Z6 w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?1 `+ y; V1 q! l8 U. q
ChiaPet 发表于 2011-2-18 09:09
6 y- \* w$ K0 ~: iAsk your builder to give you an exact quote. - g" g/ z! N0 Z! G9 vYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.3 @$ g: g4 r; h7 l
You don't have to upgrade all the windows. Only the important ones.. ~ y' {5 M1 |2 w+ p5 O
小黄 发表于 2011-2-18 09:13
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Will do. Thank you.
( C0 v% Y; K. L4 e# M) \3 J4 { & Z/ C" f8 v$ pit must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.