what is R factor? how do you have UV on the windows? : U4 F. W) h4 f! n* bChiaPet 发表于 2011-2-18 08:53
( O7 [6 y" O1 k/ t" V) D8 tR factor is used to determine insulation capability. u3 [3 f8 V3 w% t# @
) z \4 V0 p; |( c( z- BHere 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.- F5 f9 v2 Q0 w2 D2 q
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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 : ~- p, a! P \3 u8 G
R factor is used to determine insulation capability. # ]8 H: N+ |4 Z7 V+ W0 v1 k. S" t# H% W* u3 ~- S. I
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. 6 H! E+ I* \4 p& _- N0 d' {2 Q ...1 T1 ?* Y! B/ j( s
小黄 发表于 2011-2-18 09:06
4 ~, q" Q7 i3 J3 _7 `Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? " o' a9 f" S5 w* D7 e- PChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. . o. e M, q$ m- V1 Y. b% B" dYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote., D* G, D6 J2 o* s
You don't have to upgrade all the windows. Only the important ones. + S l7 m$ Z6 }6 t; T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.