what is R factor? how do you have UV on the windows? 8 h4 j5 V3 b, z3 D0 j) ~: TChiaPet 发表于 2011-2-18 08:53
+ {6 l4 L x: q( U( [2 q$ Z# A. pR factor is used to determine insulation capability.4 e+ G" S+ M3 I# ]2 u
1 b$ o" Z) |# B+ y GHere 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. . a f, m/ ^' u' r: N2 y& d- E9 |3 C2 w% c0 T4 T+ 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. 5 N A0 i' P4 n. i + w; k6 }* y b7 h" L. ?; OHere 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.. W, P( v! A- m* I
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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?# _' z. T5 K" D5 C& K6 s5 e
ChiaPet 发表于 2011-2-18 09:09
2 E* }6 }: ]* ^' q# U9 a; R N3 V @; TAsk your builder to give you an exact quote. 2 k; x' I d. V6 k4 PYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote./ M7 p @) _7 x4 w/ {1 P; V
You don't have to upgrade all the windows. Only the important ones. * |* h# U. K+ l+ W* ]5 L: V/ S9 Y小黄 发表于 2011-2-18 09:13