what is R factor? how do you have UV on the windows?# s1 T% v9 ]- Y* r! z) _& g
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. ! n% u F; q, X/ c7 ] [. n3 q# ]3 H; \! K$ b
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.* D' x1 U5 k/ D, p
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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.
本帖最后由 ChiaPet 于 2011-2-18 09:12 编辑 6 b' t6 Z8 L5 ]! c
R factor is used to determine insulation capability. |! ~# Q+ p+ u4 z7 {& ?
0 S- r$ G! l# e$ n q1 C4 E3 SHere 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., V) R; M7 x5 K, y
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小黄 发表于 2011-2-18 09:06
& {$ |. \, f$ D/ NThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 6 {# K6 y3 s0 TChiaPet 发表于 2011-2-18 09:09
% C! a, z$ N3 M6 I, h6 e: T: ]1 YAsk your builder to give you an exact quote.9 H) F& j* f1 O. [
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.* [8 Y0 j" F; [- o# O) w
You don't have to upgrade all the windows. Only the important ones. 4 O/ p/ {* B% Y小黄 发表于 2011-2-18 09:13
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it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.