what is R factor? how do you have UV on the windows? ) x/ r* C5 v) s7 _ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.: U+ P8 z& V: R3 i8 I* R" X" ~
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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. ) P0 c$ X0 Z2 M# c3 N: s7 L9 m" W
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 ' x: e. S. a( ]% z6 N' _1 q
R factor is used to determine insulation capability., I) J# y0 q9 B/ v' R( u: M
O& c8 N+ X3 H5 g1 N* J+ y! s9 EHere 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 }% r0 w% w/ K$ J: i* \; s( L2 t ... - V: Y5 k, B% g0 o. @ f9 X+ u小黄 发表于 2011-2-18 09:06
% ?1 w0 [8 S* J: p% hThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? ' p5 T3 V0 J' J3 C# x) T' n/ [2 A3 jChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. 0 N& E% g" s1 S$ C0 }* ^You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.# A- ~5 U- ^; Z4 D
You don't have to upgrade all the windows. Only the important ones.1 X2 {( _) D0 g
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.