what is R factor? how do you have UV on the windows? 1 V' ?" b, T# ^/ gChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. / _$ j6 d o' w+ D 2 C# E8 i: H0 W! i5 nHere 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. 1 P$ K' @5 _, E$ `- `* H, V: j+ I& w0 s! `. I/ Q* s% \
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.0 l" u: k& B) M2 l: T, V1 {& Z" }
' y- u$ t" E- S# k& n* T7 S0 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. P3 I$ M% I: t' ?9 _* H
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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?) Q0 n7 ], j+ ~% E0 {: [5 H
ChiaPet 发表于 2011-2-18 09:09
% J8 `5 X3 C( E$ I0 F! vAsk your builder to give you an exact quote.' W8 P$ B) i9 x% L$ @% o& g
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.2 g; G; R! k& g& ~$ g
You don't have to upgrade all the windows. Only the important ones. ; S, W& E& ]3 Y+ ~$ Z0 m小黄 发表于 2011-2-18 09:13