what is R factor? how do you have UV on the windows? 0 o' [7 y: s. k6 cChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. # U8 O( }; w% z8 | o$ J " b. H& x$ X& j* l1 wHere 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.+ |, O$ d( V* q- s) T: C/ [# g
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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. % Z) T% W1 e2 m' M( \5 [% s& o $ m/ z/ u5 n: h* ~+ K7 s$ KHere 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 s. @ m3 [# d" p( r
... : ~& h0 i3 q, a$ D* `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? & [) k7 M. j9 ]! ]9 K( J qChiaPet 发表于 2011-2-18 09:09
R* S# W& f5 w% Y6 `Ask your builder to give you an exact quote. 0 `2 m( R4 ?) o# i6 i) h$ q* ~& D0 yYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.; t' j9 y4 n9 K3 m
You don't have to upgrade all the windows. Only the important ones. 3 e! M2 M6 W# r; `/ w z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.