what is R factor? how do you have UV on the windows? 1 m; {& k1 U i) ^8 ?$ r( a9 AChiaPet 发表于 2011-2-18 08:53
- R) t. u. S3 A z, G: zR factor is used to determine insulation capability.# J2 I8 T1 N. G% t' X
8 N2 Y& ? C2 m3 {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. 0 n' A8 T: l8 A g3 {% p2 I $ k" o; W" B# q1 R3 D8 |3 l' A4 R% VHowever, 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.+ @- X$ }& ]( _" ~& v; m* v
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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. 9 `) g) f: @( m+ S" R: n5 a$ E ... , F' ^; g" T$ C' S6 T7 M; D- ~小黄 发表于 2011-2-18 09:06
" J* g$ {+ ]4 z; dThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?0 A. D2 I9 \$ D& n9 u
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. * n1 j2 i' |/ Y9 _, ~You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.' X" Y- G7 F3 S- i& d' M% l" z: s! {, S
You don't have to upgrade all the windows. Only the important ones. 2 e* e# m9 c1 l- b* @6 T小黄 发表于 2011-2-18 09:13
2 F( |0 U9 Z. z L# r( u: Q5 @$ RWill do. Thank you.