what is R factor? how do you have UV on the windows? 3 ^- ?/ |) T4 Z4 DChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. % I/ @# t% a; G2 h' d1 ^; t ^1 b+ Y/ @+ P
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.3 o% p, n; @# T
* o2 g& G" T4 s0 ^/ dHowever, 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 $ c4 n+ s A/ Q& K% ~; Y- V9 |+ z
R factor is used to determine insulation capability. - B5 S/ u5 W3 u* u3 V* K, K- b8 D5 s( s$ m
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. j) H( K/ h# `' c9 _5 N1 r ... v# z- {1 E# a+ k4 O# X
小黄 发表于 2011-2-18 09:06
4 t% d+ Z. a8 w9 F( l% X x( X0 [9 S% b% TThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?* B( H% o _9 b; f9 y
ChiaPet 发表于 2011-2-18 09:09
: N# X9 L) U' ]; ?' p5 S- `Ask your builder to give you an exact quote.2 ^5 S) z& v" @# E# `
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. # k2 d% O1 L$ { I4 K+ o% @! j, LYou don't have to upgrade all the windows. Only the important ones. " y& H' X6 }! U: I- d# h8 T: G小黄 发表于 2011-2-18 09:13