what is R factor? how do you have UV on the windows?' j" X1 Y( x8 B
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. 9 C [: M% l; v7 `" @) W! L8 E& a1 r3 s$ z$ ]
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.4 r4 t# c+ ^+ u+ _7 L `7 F. Y
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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 a" x. V' ?& |7 [* S W6 p- x
R factor is used to determine insulation capability.' U4 P, a2 i6 i; O* M2 N( O, d, O
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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. . K8 g! g. L9 C; I1 Z! d" J ...7 N$ O8 G+ X# g9 G: J: d" _
小黄 发表于 2011-2-18 09:06
8 g& C$ \& J" f: I; |Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? " t3 k. ?1 U& V6 D \2 }. ^( jChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. ! `, d( \9 p# @( s+ d: WYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. r) w/ V5 F" |8 k2 {3 J m2 P/ D6 @* k$ q
You don't have to upgrade all the windows. Only the important ones. * W9 v) q9 I( Q o# P e小黄 发表于 2011-2-18 09:13
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it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.