what is R factor? how do you have UV on the windows? ) g+ T+ n5 w8 e+ nChiaPet 发表于 2011-2-18 08:53
: y1 Y; Y1 l1 WR factor is used to determine insulation capability. 9 @- G# M: i2 n; l9 e& Q4 Z % a6 v9 v8 P) u+ d: l- zHere 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. % v5 b( l( P& M z! }& I% |, U, U6 W7 M6 q8 d
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. t) _- B5 Y; b- D3 e
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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. * p9 x- d7 L* ^/ ]) E ...! x3 p* i& Q7 t0 @, M
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? B( |$ f3 @" }$ |/ A
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.$ B! \8 j& N. ~2 c& B' n
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.0 K4 v. b, M: V) f0 i
You don't have to upgrade all the windows. Only the important ones. ! y( F7 ^0 r# x小黄 发表于 2011-2-18 09:13