what is R factor? how do you have UV on the windows? ' d0 b) H- h; [3 Q8 }ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. 4 f: c8 R6 b8 j: m% H* ^) w) L& o; }# W/ q7 |7 o
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( c! [/ i8 W% K" t; h9 H1 l: @' [% ?, z. \$ q
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 4 X( ^5 X4 C0 M0 Q; c. f4 C
R factor is used to determine insulation capability. 2 |8 K* g' A8 ~2 y/ M 3 U* J- R4 }* G9 |! FHere 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.' p7 B: b4 H+ h, F F
... ) [1 Q N5 d8 A$ P$ P' x小黄 发表于 2011-2-18 09:06
8 S. z. Q9 w4 o, I K3 f2 T* i. nThank you for your reply. But would sun-stop coating cost too much?
Ask your builder to give you an exact quote. 4 ]4 B. Z0 R# j: F5 G$ XYou don't have to upgrade all the windows. Only the important ones.5 ]& n/ X: s/ _
小黄 发表于 2011-2-18 09:13
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Will do. Thank you.
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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.