what is R factor? how do you have UV on the windows?0 D# ?5 @( A' J) \2 [1 j
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. @7 ~: u8 K$ U' |4 @, I! M6 u: c, ?% k! ?1 t6 @. H+ c/ g
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.8 e4 K; v9 }$ }$ H
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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. - J- Y6 A, y8 L4 B) W8 f6 ?; R9 U' f3 F
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.! e0 } V) J8 c/ ?
... : R" o7 }# R( e. y) i. ]$ Q小黄 发表于 2011-2-18 09:06
6 g" e# f D) _$ s* ^! hThank you for your reply. But would sun-stop coating cost too much?
8 V- V; r# _1 r1 V6 {Ask your builder to give you an exact quote.3 w4 M& W) ~8 y/ z
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.; e6 Q8 |3 x) j& h/ S
You don't have to upgrade all the windows. Only the important ones.; J* q1 q8 \4 \# }: K$ Z; f( Q
小黄 发表于 2011-2-18 09:13