what is R factor? how do you have UV on the windows?8 [' o R/ S* H) |2 Q3 M
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. ( M9 D+ h& a$ w6 [3 j( `* ]0 g' X* ^2 J& x, [. L1 h% n
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. 3 k' o4 C' T3 ~" [2 G. | ; ^/ A* ~: c/ S! w) n7 gHowever, 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 ' [ e7 X* Q, e5 \. Q2 B
R factor is used to determine insulation capability.. D' O7 ^1 R0 i7 W/ }
! R) X+ {( z& x5 Z) u( RHere 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. ) I4 ?9 I- g% E2 E7 c1 T' R( d ...) W& y& y/ Q5 A, G9 e7 B* K
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?; e% G& v1 M- p+ r( z# p) M
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. # V* h( f* T; yYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. , G& p, i+ M( N! d0 o5 K0 LYou don't have to upgrade all the windows. Only the important ones. " P, R* D0 ^2 \* j: b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.