what is R factor? how do you have UV on the windows? 0 r7 O q. e# uChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.; S1 b5 X0 u; @
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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.5 D+ t w" K- u' f' T6 \! v
' {$ x5 S( B. }8 aHowever, 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 8 N0 B' W* q' U& e
R factor is used to determine insulation capability.. g3 Z9 |3 c) p: M% L
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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. 8 C' I" u: K, W5 o4 W" P ...) t) L5 n5 R6 t' N3 F
小黄 发表于 2011-2-18 09:06
8 S! B5 ]6 o+ Q) r" F4 @/ rThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?; f" W: a! o _% |
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. , s8 d# z, H! S u6 D) mYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.5 b8 s+ F+ e. {2 Z4 t
You don't have to upgrade all the windows. Only the important ones.3 N: t) c* p' F* A$ n: F- z# t
小黄 发表于 2011-2-18 09:13