what is R factor? how do you have UV on the windows?" Q8 @0 ~* H- S* o( G5 B7 D5 c8 f
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.0 U; P, w* Y* E5 Q9 |
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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. n2 E3 @# d+ R* I6 q, [% z9 e3 s' I: m! o# r
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.
R factor is used to determine insulation capability. 2 ^* T$ ]3 k9 t( v " A% A; k# n: u' e* e9 S6 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.7 |& o: o7 R8 t% `4 w5 z
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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?4 e |% N, {( n, P8 d
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. / F( i I$ q+ _9 {. mYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.4 s4 k( x- a! v- X. \4 h' _1 [
You don't have to upgrade all the windows. Only the important ones. & Y+ X$ v& d8 h( ~ @) Q+ t1 G0 l小黄 发表于 2011-2-18 09:13