what is R factor? how do you have UV on the windows?/ g3 L" p9 H( q1 Q' t: W
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. $ c |% ?# N. G% p3 L ; `9 ~6 k3 _- R! [! R& p8 nHere 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 X+ d8 q- |- A# `! W+ A/ J 1 f. p* U% G# V* U/ \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. , a* S: J" N" U) j& Z2 g6 w% W2 `& V1 l" }
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.' Y v3 z0 k' w
... 1 i$ {4 _, f* l9 p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?
Ask your builder to give you an exact quote.8 F& f' X. K6 E; Z& ]
You don't have to upgrade all the windows. Only the important ones.' l! E) A/ |* b, m, [ B. Q
小黄 发表于 2011-2-18 09:13
' j6 Y9 {% Y; p, e% e0 a ' l/ l$ `8 G4 R+ o; e8 \it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.