what is R factor? how do you have UV on the windows? - ^2 j7 H A0 HChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. ' l+ i0 v) g/ v+ {4 `3 c 5 p7 J7 W1 y1 `* n: m8 U- ^& AHere 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 g( E1 f5 R: U& G @; a( }9 l+ l9 D8 O% e& dHowever, 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. % _6 _1 Z a, f; _7 i 1 p2 d3 I4 l ^7 ]5 V. G+ J0 MHere 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.& P g4 I" j4 \5 |1 A: d( m; H
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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?0 M& o- L$ f5 b Z* l
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. / J% z" z& H9 P3 iYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. , m7 b m0 [7 z2 N- OYou don't have to upgrade all the windows. Only the important ones.8 P6 x; H2 h9 J
小黄 发表于 2011-2-18 09:13