what is R factor? how do you have UV on the windows? * o+ `; \8 e* TChiaPet 发表于 2011-2-18 08:53
3 M, t8 h# i3 A& e8 K5 YR factor is used to determine insulation capability.* E( T7 E% f* _+ z* ]0 `2 X$ h
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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.4 v5 C; q8 ]* _3 B; w' I8 P4 ?/ m
& n2 O- M7 f9 `8 D8 }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.& v5 ^% `; Z' e) J+ \
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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. 7 p; A5 Y# z- {* I ~! T ... ( Q% @2 ]8 S# s- n+ }: F! r小黄 发表于 2011-2-18 09:06
1 Z. n% b1 j9 h3 wThank you for your reply. But would sun-stop coating cost too much?
Ask your builder to give you an exact quote.( J) ]4 u: H- C+ f
You don't have to upgrade all the windows. Only the important ones.1 k/ i* H0 m9 @, X/ J- ]
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.