what is R factor? how do you have UV on the windows?( r0 X/ [4 H8 f! ^) [
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability." C/ U) W' W3 `0 ? K
' L0 F" d- J* v) r& o% HHere 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% @, l( i& B2 B! @; [8 P1 `) g( x2 B
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. 9 h8 ~7 X/ g5 f2 X3 s- P& P) a 1 n1 s: f: Q% Y* L. s, p0 {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. $ e# n5 Z3 G+ m! Q" h ... 5 s, j# m# k3 ~- `- y* f+ c' l6 P小黄 发表于 2011-2-18 09:06
?; ^) d6 D* t* @1 uThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? $ c* B' J8 Q, k ], oChiaPet 发表于 2011-2-18 09:09
# C% b( n4 C. ~- K% k. jAsk your builder to give you an exact quote.6 ]5 F* ]) W* C
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.- W+ W; d) p2 l+ C& |" i- t
You don't have to upgrade all the windows. Only the important ones.- N* Q8 ?4 x j" |: N
小黄 发表于 2011-2-18 09:13