what is R factor? how do you have UV on the windows?0 T. N, s" s5 T) z. q
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.9 y1 S; j8 g7 u5 L! X
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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. ) d" I u' E5 a8 F# L 8 Q$ h; X& V0 M4 Z% v: i _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.( k& A: w2 d! \
; |4 o2 L; Z* X3 t+ E2 [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. % h7 i* z/ W4 y( M. u ... 2 k7 c* H4 z' z/ O小黄 发表于 2011-2-18 09:06
, v) `, l# C1 z6 P- |( sThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? % `+ {! { V$ hChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. ' I! O' g! o% s k4 t, D+ q' zYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. 0 Q: |) v/ @' ^) C5 NYou don't have to upgrade all the windows. Only the important ones. % U% i/ u5 J; J M6 X小黄 发表于 2011-2-18 09:13
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it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.