what is R factor? how do you have UV on the windows? + K, @0 {/ e9 o! l. @' O# d& ^6 UChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.; Y( z5 Y. s- O- a/ e _0 c9 w! x
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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.8 F* O- f0 K- m; y2 f
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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. ' ~/ L3 d" Z" J" }) L' }3 t( \ , w. O1 F2 D+ ]+ R/ a' ^) 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. * p/ m+ I$ R1 c" M+ J6 m: a ...% n' F3 h0 F; ?' r+ p+ S- W& B
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? 4 ^3 O% h% R( SChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. ) s; f/ D! U0 v6 A& U8 LYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. 4 Q" X0 i7 v, ~: R! z+ x, kYou don't have to upgrade all the windows. Only the important ones. ) i/ F* }( i0 J5 z% {3 _% d4 Y5 ^小黄 发表于 2011-2-18 09:13
0 ~5 L* `! ?. u+ E 0 w2 `# S6 h4 b9 g% b A7 X/ a& Rit must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.