what is R factor? how do you have UV on the windows? 9 s6 ?0 }. _9 v, w% [ChiaPet 发表于 2011-2-18 08:53
4 K" S( h4 s7 ?, _1 I8 ~R factor is used to determine insulation capability. + K( I! R) e% R1 {3 B$ H3 ~4 @0 |$ s' Y/ Q
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 N' K! A0 I! d
K2 d/ T& C6 X4 A) ]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 4 |2 b) b' H6 ]0 ?' j9 ]9 W
R factor is used to determine insulation capability.1 u5 I4 u5 M# V( v( B
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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.2 j8 t' Q; e$ U+ J* G8 `1 |
... % } ?, X6 _* X小黄 发表于 2011-2-18 09:06
+ O6 J6 k7 q, t/ oThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 2 J* S. z( f7 C) x2 ^( CChiaPet 发表于 2011-2-18 09:09
) `7 s5 ~1 j# x6 Y4 @+ G5 CAsk your builder to give you an exact quote. # K" j9 f- O; ]% J: j* QYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.7 ~% X. U+ G, X3 a( _, p
You don't have to upgrade all the windows. Only the important ones.: H3 y5 c4 }( [( S' t# x1 H% c: u1 A. E
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.