what is R factor? how do you have UV on the windows? - G+ Y- {4 `* ~6 q9 L2 Z7 pChiaPet 发表于 2011-2-18 08:53
. M- w c8 h% v# S" W) N5 sR factor is used to determine insulation capability.# t& m1 ~1 F* u/ `- ~
; |6 ]2 w3 D6 N' }8 `, {0 {) N5 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.( Z+ o) }- v' a0 [5 n5 f' f
7 I% C) G9 l' CHowever, 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.' A8 `+ a% I7 T& B) ~( C' L9 A
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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., z7 Y: x3 r8 ?0 J4 F/ }0 M
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小黄 发表于 2011-2-18 09:06
8 ]0 W$ U. Y7 R% s: ~" X5 \. VThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?0 Q) T }5 Z, J0 z' d
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.0 C- Y3 r5 o! w/ a# Y
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. 0 n8 s% |' _2 r6 L; r: pYou don't have to upgrade all the windows. Only the important ones." i5 n ~" r' { S! p6 D
小黄 发表于 2011-2-18 09:13