what is R factor? how do you have UV on the windows? * \; l5 A! H8 I2 m) {; t$ a9 P5 W0 JChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. ]; f1 \. C& r% z( V& x & O8 a6 } V$ A& m/ 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. ! l. P& D3 @# R; t* u/ ~2 P9 T3 T( O6 g- u6 |1 W7 i
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. 8 B, A9 M: j* \ ' v, I2 {! H3 c0 O3 ZHere 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.; N8 p/ B9 T0 i% h4 O
... # N% m; l; | _+ ]6 l/ p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? . v, S) M. v; V: a% L% mChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. 7 u! o r9 z2 a5 i) q3 DYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. C. a; f, s) ^; \$ L2 c5 d3 u, ~* N
You don't have to upgrade all the windows. Only the important ones.: u i/ [* ?/ l
小黄 发表于 2011-2-18 09:13
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Will do. Thank you.