what is R factor? how do you have UV on the windows? $ T) ~7 X$ j. Q9 R8 \$ MChiaPet 发表于 2011-2-18 08:53
& {/ m5 d; S, p% g3 N: j0 E! A
R factor is used to determine insulation capability. - F( e- b, c" x" `! Z5 w8 J9 U4 A2 V; J1 u
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.6 L5 ~: e- @; O" H4 Z
" o* g3 q( x* b8 l2 c$ m
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./ ]" q' b8 ]/ a& [: I: ]+ q
( b: V& E1 n9 m( j) R( |
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.- G- _4 v& O- V. T/ q! e
... ( B7 q3 f4 B6 g+ ^9 s( U小黄 发表于 2011-2-18 09:06
! x7 d+ a1 r2 a& O& J
Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?; E5 l, {6 ]! f/ P' _7 [
ChiaPet 发表于 2011-2-18 09:09
$ m$ y1 [* O- _$ b0 o
Ask your builder to give you an exact quote. ' t' k4 i9 O/ ?1 ?" e! EYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.! [% Z0 E7 n/ j) b
You don't have to upgrade all the windows. Only the important ones. & {- R/ q- Q+ [& J6 E& w2 h" A小黄 发表于 2011-2-18 09:13
6 ~* T8 C% K$ l/ c# x
7 e$ L1 X+ \+ h8 S4 g( R' I( P- |1 \+ L
it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.