what is R factor? how do you have UV on the windows? # R$ E4 q9 W, L1 k+ L8 OChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.8 N6 l$ p7 @: O
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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.- ]0 r. H6 d) E0 r' d& {
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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. 2 A {: @; ^8 y+ y* i* ] ) l5 W8 }$ q2 k5 ]2 uHere 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.$ }; C# i* k9 S) w7 `
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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?# P" {% z5 q" U; G& U2 Q
ChiaPet 发表于 2011-2-18 09:09
; U$ E& r, ~' k6 p* E3 R" `Ask your builder to give you an exact quote.- A" a6 z9 k" l5 |) C
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.; J- E; k$ K0 B. T
You don't have to upgrade all the windows. Only the important ones.1 x. m0 Y, I( I
小黄 发表于 2011-2-18 09:13