what is R factor? how do you have UV on the windows? - ^4 q# K( E, G7 w- k% m4 TChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. . }8 {' W5 C \2 M5 U4 f1 K6 h / c/ _! ?* P$ m- ]1 ~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. # R0 \2 \- z+ K, |4 U0 s- g 1 y1 T9 c3 }- h( @1 `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.5 ^+ ]3 u7 L0 i1 K9 u
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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. # S! g* ?4 T0 ^( h ... ; E) D' C* p2 m' B% T& Z7 O; g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? $ S9 i# ^" E8 z' `" n. m. HChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. , G+ _9 M3 e( S. @You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.' Q2 L, N, U3 B. ]0 \, v' R0 e
You don't have to upgrade all the windows. Only the important ones.' h3 f9 J4 v# j/ q5 r/ k9 W
小黄 发表于 2011-2-18 09:13