what is R factor? how do you have UV on the windows?' O0 O0 J) G! @
ChiaPet 发表于 2011-2-18 08:53
, [5 P! h: i* u8 f3 `, IR factor is used to determine insulation capability.6 G) t1 {5 r ?& x( a6 F6 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. ) g/ g4 {0 L+ e- @: m4 M& R% @8 y3 i) W
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., y' \& A: w4 b+ T
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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. 4 `1 }$ {" P0 S/ Z ...! ~7 W& c( X; D$ X' B
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? X% s) m! Y7 _ T5 WChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.% o+ \% I* ?! {( k- B1 E! D5 m
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. 8 K4 D6 c: A$ A! o. CYou don't have to upgrade all the windows. Only the important ones. E! b+ E6 o) C+ @1 o
小黄 发表于 2011-2-18 09:13
) F. t- p( }; C8 {6 { . d& s3 g% a& ~ B* {3 cit must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.