what is R factor? how do you have UV on the windows?3 k( x. t% ~. Y" Y9 A# x& l
ChiaPet 发表于 2011-2-18 08:53
$ m- ~9 c+ E' S: `' z, pR factor is used to determine insulation capability.- e3 v! C! b9 d8 Q- a" q D
; h7 G! s8 l3 C9 T% j4 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.' q/ v# w5 P( n2 f3 S" z- c& o! a' K, {
& Z$ n' D; C, w9 YHowever, 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. 0 l+ E8 t4 k. @6 ]; c5 l, p6 m( j# s, d: x, e" W
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.# i) i* U7 W1 [8 q: {) F1 p/ N; H
... 5 E4 O. b) d7 U) Y* w B" L 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?
would sun-stop coating cost too much?- |2 d+ h/ z L
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. 9 s4 m1 g6 L2 o, o- SYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.( x- l/ c# |; g. g6 R+ O
You don't have to upgrade all the windows. Only the important ones.6 q* p/ L) q- x* S* `
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.