what is R factor? how do you have UV on the windows?4 o: P( n+ C$ w- C
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.9 P9 ]% [# G$ H/ \! k
6 {- H1 C; i: }4 ~2 ^7 r7 oHere 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. 1 F7 i5 D1 f* ~$ \7 M/ L( Y2 A, \5 o4 [/ n- b1 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.; T/ b5 g* ^( m; Y+ R' u9 M
" y+ z% R% [8 d& I" Y1 RHere 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. " G: a$ R% K9 p: H9 d ...( `" |& {( ^& c/ i: `% C# q
小黄 发表于 2011-2-18 09:06
7 \' L2 Z3 g% L6 TThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? , m- I# \. {! z, QChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.! ^/ R6 o6 m U4 ^
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. " ~$ X/ U; l) W8 Q0 v6 D' f6 z1 sYou don't have to upgrade all the windows. Only the important ones. 1 U% w/ X- o3 ~. e小黄 发表于 2011-2-18 09:13