what is R factor? how do you have UV on the windows?7 ]; R8 ]' b7 z/ o" A
ChiaPet 发表于 2011-2-18 08:53
8 {" g( `$ G! T6 xR factor is used to determine insulation capability.+ ]! F% s+ j, c$ Z( ?
) N# L- S/ K1 [ [* O9 L% B0 KHere 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.! k- ]- g; L; a1 y" N" u: L
% m7 ]; o& D5 B+ h, J( U2 b. SHowever, 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. 3 m( i7 S" H( g0 q9 z/ m9 w' W4 M n X9 C! h
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 @) Y8 V1 u$ a1 E
... ) j* D7 n; @( Q/ Z小黄 发表于 2011-2-18 09:06
7 E: ~" Y1 Z. I' L/ T/ ZThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? , U. l$ Q( s. w8 F# Y' r' h7 GChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. 6 ]/ `/ M) V" b+ P$ x4 p' W8 L2 jYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. ) x' E. j3 q( d/ A3 n GYou don't have to upgrade all the windows. Only the important ones.3 o' Q3 b5 F' M+ L5 [6 d; B% M3 l7 u
小黄 发表于 2011-2-18 09:13