what is R factor? how do you have UV on the windows? 8 l% t" D: @8 h' v( bChiaPet 发表于 2011-2-18 08:53
1 b7 v' o% g1 eR factor is used to determine insulation capability.5 l4 [0 a* {; V4 V
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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. 4 d* h+ a. i9 a, H) x # E4 t3 b% \6 r7 E/ VHowever, 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. 1 m3 c X: i$ y8 `1 F, q$ F' i# ^. o5 V9 K) q0 F4 J4 M; W
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.* n% P. i3 a) y- }- ?- S5 K# U
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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? 9 J- B ?4 z ?ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. % b! i+ l1 g! R" Q. ], e8 ]You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. ) D( r8 y. j5 q& m4 ]) t1 eYou don't have to upgrade all the windows. Only the important ones. ! S. d1 o& e2 O小黄 发表于 2011-2-18 09:13