what is R factor? how do you have UV on the windows?+ N0 c* |! }2 T
ChiaPet 发表于 2011-2-18 08:53
# j- r* J- s3 Y8 kR factor is used to determine insulation capability.6 m, E3 _- v1 z1 y1 i
8 e1 J$ w& J: v, NHere 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. / k9 N* S- K) z6 w0 Y6 B4 S; W# d! H O/ e2 k5 Z
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.# K/ z/ ~; ^! y8 V# F
1 f( L" k3 ?. V. m* }5 DHere 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. ) e7 I$ K8 A" o9 S( w2 P ... % d; z0 U" G& J) x5 w% Y. w小黄 发表于 2011-2-18 09:06
4 U1 {! x5 Q2 d- B6 B$ f- R8 QThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? % r6 q6 l' F, nChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. 3 x c5 \7 l* z; n) iYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.( a) y/ K) p& x2 A3 }
You don't have to upgrade all the windows. Only the important ones. s6 X9 i) y0 R6 A3 k
小黄 发表于 2011-2-18 09:13
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Will do. Thank you.