what is R factor? how do you have UV on the windows? . ?, }' @8 T' O: wChiaPet 发表于 2011-2-18 08:53
' C3 q5 ?. |7 v" F/ O% ER factor is used to determine insulation capability. " `9 {' a) ]( n' u 3 Q# C) y' ~4 A2 a0 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. % v5 V# z0 d6 n" _. D * W6 Y! q/ k2 g- PHowever, 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.& `8 ]+ A4 U3 C1 A/ b
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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.: @. s9 N- ^: M6 n2 I0 [! B5 K5 `
... , b5 B0 f' `6 R& m0 K7 N( B小黄 发表于 2011-2-18 09:06
* I; G$ M$ N2 h3 ?+ T4 |4 [Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?/ o$ p, J! J! P. L6 Y8 w6 {
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote." N$ K4 V$ O) r: J2 M
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.' E" w$ y+ H( N: }# b
You don't have to upgrade all the windows. Only the important ones. ! @" J4 i) g% N% i- F! m小黄 发表于 2011-2-18 09:13
9 S3 s; a& Z/ k3 _. o 3 V7 _1 {) M/ r( u$ u) Oit must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.