what is R factor? how do you have UV on the windows? # x3 B" J( o1 ^1 l5 r- iChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. 7 O& P4 U* f( T5 T, V/ e; Z* } E( } ]9 p+ E- V8 [& l
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.! y: V* H! l T6 K/ K+ I$ @
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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 % \7 a) `, c; Q% ?) D3 z7 R
R factor is used to determine insulation capability. ' p4 s% j( ~/ s& `- Z, j. B4 K( l" H: ^* _) {
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. / ^5 Y5 ?$ F! e0 l" ? ...- j1 u( G* ?# J. ^8 ~
小黄 发表于 2011-2-18 09:06
1 V2 W2 h4 [. z9 ~) {Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? ! E' @" c: D9 _6 {ChiaPet 发表于 2011-2-18 09:09
3 N3 e# U# _; y; C) v8 AAsk your builder to give you an exact quote. H; P- H0 Q4 p9 }7 s* ?You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. - u2 G9 R* K: g* L# W7 p1 ]$ o! oYou don't have to upgrade all the windows. Only the important ones. ! x. d5 Q! }0 C" S' H5 Q$ c小黄 发表于 2011-2-18 09:13
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Will do. Thank you.