what is R factor? how do you have UV on the windows? ! j1 ]- @7 |' O5 E7 N! XChiaPet 发表于 2011-2-18 08:53
$ A D6 z( C+ [3 A* D0 D+ O6 y% HR factor is used to determine insulation capability. 9 q" B( ?" L! ]/ Q- Z: }3 J* I- i 2 J: v& S$ \4 N/ [! c5 m, vHere 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$ N. J8 W% e9 H4 V# p, P, ]
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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.
R factor is used to determine insulation capability. + z- X' w( [9 M 9 b6 o# Z( G* p! YHere 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. , M# A# J$ g M& r5 Y7 O ...+ c* i6 g j- M7 [& f U
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? , V/ J7 e2 @% T( o' }( XChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. - H5 J* S; p+ \0 R, I wYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. # p7 F# p( N0 ~$ o0 J, u4 b" \9 {You don't have to upgrade all the windows. Only the important ones.) N% N& i$ E3 h# z
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.