what is R factor? how do you have UV on the windows?( Z( K4 `3 M1 @ M' e+ d
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. % V9 L* S! L8 [6 r! P$ `. n) w r, M: L+ Y3 a; b
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. 3 i. p+ h/ ]' x' k6 W5 K1 x/ s7 { : o0 b5 s! N6 e- ^# bHowever, 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) A& H7 |0 s' u- @1 G, |. z
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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. ! M( r H/ ], a8 I# y ... # D0 U3 S4 h+ I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? ~# \# x* u" m% G) `
ChiaPet 发表于 2011-2-18 09:09
5 h& J+ t3 h7 T% f* k) aAsk your builder to give you an exact quote.; P5 I$ N1 u- j, N4 g) h
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.4 y) p- n4 t8 p
You don't have to upgrade all the windows. Only the important ones.8 E% `, q+ e) s) \; r, j9 f# B2 C
小黄 发表于 2011-2-18 09:13