what is R factor? how do you have UV on the windows? + J* K0 R! z% H: Q2 z- |! ~ChiaPet 发表于 2011-2-18 08:53
+ ?" _ g) h" ~( _R factor is used to determine insulation capability.3 z, Y4 @. \: r
$ m2 Y0 @ C7 b) I2 J, t1 `
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. ; }: `/ r" h% |; I. @+ D0 } " a! ~* [% e* y! ]7 m9 hHowever, 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. I# R% q! f/ l, \# }$ E3 v; Y: _
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. ) y# h2 L) D8 J9 }3 x ... M' _* j3 X/ |. d3 L+ M7 W小黄 发表于 2011-2-18 09:06
: P' w Z3 r6 ~0 g9 p+ P; X
Thank you for your reply. But would sun-stop coating cost too much?
Ask your builder to give you an exact quote.! M7 o/ x. s; a% d" r0 T0 R
You don't have to upgrade all the windows. Only the important ones. $ B/ t! r( t# a# u# P小黄 发表于 2011-2-18 09:13
: X; q$ j! | }4 t
) o1 W; E5 O6 k+ n) ~( U; ^
it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.