what is R factor? how do you have UV on the windows?) H( r @# a- p0 k4 G# h
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.& _3 W* y# D! S3 V
$ w" x8 W1 b) @, xHere 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. ! K2 w2 {0 } O 5 d, A! ~5 c% y _- _/ eHowever, 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 " m; k, D& w0 c3 q- G1 R( Y; b
R factor is used to determine insulation capability. ( B1 K" t. c: b/ a ) e0 H4 `. O1 R! o( S8 T- D' uHere 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.2 e' @( K/ X. x- x- f; J( `
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小黄 发表于 2011-2-18 09:06
5 j1 \2 J9 L: h3 S( i+ jThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? ( F: h! Z9 S. T. G/ qChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. - K b6 {, }) ^You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. $ k% D& B' R- _! Q% H$ xYou don't have to upgrade all the windows. Only the important ones. n# v% ?( x- T小黄 发表于 2011-2-18 09:13