what is R factor? how do you have UV on the windows?. k( z# D& ?8 D" l
ChiaPet 发表于 2011-2-18 08:53
' [1 s: b; o) t( V3 l: m" FR factor is used to determine insulation capability. ; D/ B& r' B' c8 [+ w) G$ N+ u7 `" r4 m
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. " ]' c+ r" W- C% k1 ~ y1 R7 V- \* {& b! g& `$ h# S& P
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. 0 \- _- [" w' { M! i% L8 Q & R0 e$ o6 A4 a& N( QHere 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.$ n; @ _! }+ Q) t5 }$ b2 O
... ' m1 l2 G& k! u0 x$ s小黄 发表于 2011-2-18 09:06
1 }& S2 g- K, S$ z$ iThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? & g# L; ^7 Z, R; Y5 X) N( x+ a) j% ]ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. " m M, G( h: l3 ?" M( A1 lYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. ! k- Y8 x5 p# l* J5 J _You don't have to upgrade all the windows. Only the important ones. ' r( w$ N# _8 S' F% R小黄 发表于 2011-2-18 09:13
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it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.