what is R factor? how do you have UV on the windows?$ w4 b" o8 q. Q4 G
ChiaPet 发表于 2011-2-18 08:53
5 o0 M' _; Y; W# O- K# qR factor is used to determine insulation capability.; q. o6 X K0 w3 v L
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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. ( Z( ?, A1 i; y: Q! B: v* R1 A$ j3 P: k2 h3 W
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. 5 @' d/ R- ~& v& p # ?7 B/ _& J# }8 Q0 p+ kHere 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.9 o$ P9 R( c7 E+ n6 y+ W
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小黄 发表于 2011-2-18 09:06
/ ]: M/ w0 H$ Q6 ~) h* a3 a1 wThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?* @! S: j$ y7 N
ChiaPet 发表于 2011-2-18 09:09
* W# N1 L% l; i4 Z X" q" ZAsk your builder to give you an exact quote.) ~' Y! c# \4 k* l
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.0 S! E. _1 I @7 [5 F
You don't have to upgrade all the windows. Only the important ones. 4 R0 o5 d6 d$ _" I6 m8 v小黄 发表于 2011-2-18 09:13