what is R factor? how do you have UV on the windows? 4 ?& H3 y" g& \" q: G/ D' lChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. % J' @6 ?" e1 d5 i6 K( p # }' n9 }+ o4 O5 ]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. * _8 {: X# x8 V' w4 o& u3 E- e% w0 T4 G9 k, M
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.# ]4 y/ `& x# N7 T) I# x9 c
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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. ; _ m" e! f- l ...$ k2 P: Y8 T; b( E7 J+ g& J
小黄 发表于 2011-2-18 09:06
! {9 n! J; y# }2 h8 eThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 0 A2 e9 [) ]( B& MChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.2 b p e+ q5 a1 P3 E4 g# N* g
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. 6 h* x3 i4 r5 sYou don't have to upgrade all the windows. Only the important ones. ! f1 u! m$ O9 z小黄 发表于 2011-2-18 09:13