what is R factor? how do you have UV on the windows?. V" P$ S" q; G2 `" k
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. 1 d) @5 e1 w4 t/ Y0 H0 `8 X! Y* A8 I: _' R3 O& B
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. . T) P& o, r3 ]) F# s9 O # S3 h; g) H# F6 iHowever, 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.5 I; h. y" r' @1 q
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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., N) {6 F3 i/ l* v- C ?! L4 L, S
... $ l; v- W0 z( ]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?; `. z- y2 v3 B8 B3 s4 c# P& a' K
ChiaPet 发表于 2011-2-18 09:09
c0 _/ r. E' G6 \) g; \/ hAsk your builder to give you an exact quote.1 s' L& E9 C# I$ H" j
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. . x. {. g) F# v- aYou don't have to upgrade all the windows. Only the important ones. " n: U; Q4 U6 ~小黄 发表于 2011-2-18 09:13