what is R factor? how do you have UV on the windows? & ~+ u# V5 I& v& T9 OChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. ' R% S8 ~2 Y y4 I: P0 N" J2 \/ ~2 \" B7 L! U; S+ m
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. Q. v- G' h$ I" b8 j! |/ S; X: J
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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.
本帖最后由 ChiaPet 于 2011-2-18 09:12 编辑 : l6 c7 c7 X1 o, t9 D
R factor is used to determine insulation capability. ( ] y" d9 W, w+ M' d 2 t* |4 ?: ?# g) v: IHere 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. , j" Q$ x. Y5 A* ~% D# @ ... 6 _9 T! b: d) v& W5 U& y5 A/ V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? 4 O1 i, w; i2 Y/ }ChiaPet 发表于 2011-2-18 09:09
, N! _. u: K1 m5 V4 l& \Ask your builder to give you an exact quote.$ p( m' D2 m2 U {
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.6 E7 x: p8 o- X" H# ]
You don't have to upgrade all the windows. Only the important ones. 7 F0 r5 @5 X3 }+ R4 @5 v# Z, g小黄 发表于 2011-2-18 09:13