what is R factor? how do you have UV on the windows? - U7 |/ W" V. z5 H- q/ m1 eChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.% m" |' V1 w7 V( v: @5 m5 R$ r0 g
- y+ W# D% A+ B$ v, HHere 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. " D9 Z; `8 ]" v& D5 t * Q( [9 d8 |8 H3 zHowever, 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. u9 q- H" O0 A
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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. S, ^+ o4 A; ?3 j ...+ M/ j( T4 f: [& Q
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? % @: D( [& o x2 d, K! q4 q4 ]ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. % E$ _7 D3 ]; ^+ b1 C4 m6 rYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. . e6 q6 ?$ h6 e2 p. C' e8 u. D4 A+ qYou don't have to upgrade all the windows. Only the important ones. " B+ d1 ?4 t3 z小黄 发表于 2011-2-18 09:13