what is R factor? how do you have UV on the windows?. D, R3 T' Z d0 m# |
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.* B, G; z. g. u3 _/ p5 U0 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. 7 f4 c8 g% [9 B3 ` 2 [( r# s7 h' X8 i- lHowever, 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.9 z" a/ g* c7 Q: b3 O
& l5 u6 o) H) u- \5 ?5 \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.) `: k8 ~. }; F2 G
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小黄 发表于 2011-2-18 09:06
- G9 e. l/ e W: E4 DThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?& a) J; ?( V3 ~3 w
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.' `8 N g! e& \
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. 1 d6 [) k# i8 TYou don't have to upgrade all the windows. Only the important ones. $ V: ~. e$ S0 Y7 Y& I2 \小黄 发表于 2011-2-18 09:13
( p* X' V v7 F0 l9 U0 K f# l! ] & T6 E' F/ A' V( g; T! t9 git must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.