what is R factor? how do you have UV on the windows? / T4 \0 B- l+ V4 lChiaPet 发表于 2011-2-18 08:53
! d: e: p- h( y+ WR factor is used to determine insulation capability.# P/ |2 G$ j' {2 {# |( E
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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.! p2 S/ g7 f( o! }
+ Y# _1 S% y B( R) F1 \' ^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.
本帖最后由 ChiaPet 于 2011-2-18 09:12 编辑 9 y, y; l! |# M3 K% D2 F
R factor is used to determine insulation capability.9 \1 @7 S1 ?5 S3 P
! W/ O6 T1 W/ j7 U ]0 [. C. `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.. F- L {) y6 n+ g M9 k& M' ]) q
... ( J7 s) X% L( m& [7 C6 B) J5 ~小黄 发表于 2011-2-18 09:06
& j0 J3 h& s/ j: L8 uThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?$ H; F/ g, `5 E% W3 @: ]
ChiaPet 发表于 2011-2-18 09:09
& D, ]3 ^& I1 q6 v$ OAsk your builder to give you an exact quote. , a- a& s2 a E& E* g- KYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. & Y$ I1 e; I& m2 G: z( qYou don't have to upgrade all the windows. Only the important ones. 5 x+ A% B5 V! h7 ^) r小黄 发表于 2011-2-18 09:13