what is R factor? how do you have UV on the windows? ! z" Z2 j5 H; O# G4 o& UChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.8 ?& o$ F- r9 u0 u' }. L. u9 i, m% ~
7 `0 B& p+ {3 d; {% U2 V; }& x2 R9 lHere 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.: e+ T" ^; c- F j2 A9 @
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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. , y& \" X) z6 |' n- T: f" J# o- ` a$ K& c& h9 s( D! D7 S
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. 8 \$ I V5 v+ r& d } ... y4 {" H. J. _: t7 Y: C
小黄 发表于 2011-2-18 09:06
0 v2 B3 I3 G$ {Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?. t4 M' |- K' T2 b
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.; X+ T& W) @- i* k7 p
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.0 e5 n1 ~! d/ M
You don't have to upgrade all the windows. Only the important ones.. p! o1 w' n$ ~. v K
小黄 发表于 2011-2-18 09:13