what is R factor? how do you have UV on the windows? - i+ E2 c! X; V( m; _6 PChiaPet 发表于 2011-2-18 08:53
; y+ L9 q9 }* J3 hR factor is used to determine insulation capability. ) m, d- g+ h# _6 \/ Z- C + B' Y$ Q7 f1 b0 f$ 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.! N* H! ~- ~0 ]6 E8 h; k. D
6 r+ c n, K/ ], ~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. ( x0 V7 ?8 q) L( O4 |8 } r, [0 G' |' W" X+ @& x( T9 H
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' a. c5 _. d5 m3 @
... ' f' l6 P, w' Z1 ~ N5 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?7 f+ t: n; Q H+ `
ChiaPet 发表于 2011-2-18 09:09
. M4 G- |. _2 d3 zAsk your builder to give you an exact quote." E! m, A6 P6 ?! [+ T' C6 R
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. ' t8 P' l f2 \1 DYou don't have to upgrade all the windows. Only the important ones. 9 M6 Z! f7 Q$ B( o- E! v/ h* ?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.