what is R factor? how do you have UV on the windows?8 O1 ~5 o* i. r' r
ChiaPet 发表于 2011-2-18 08:53
8 [5 x8 H1 c1 R' B4 E- fR factor is used to determine insulation capability. 6 H9 J0 x$ q, R4 F( g& B " W: ~2 }# N/ |1 ^* F. H; U1 y" YHere 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.4 w- x \; l7 n D' B7 _
% n: B# A! S' C* THowever, 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.: a# s e' L" L j
8 J; d' M* D$ d% V( U3 B# HHere 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.3 W& Y; B. q! l- Y- r, T
... ) w/ m, m: b6 E) Y: ]* y, n8 B& `小黄 发表于 2011-2-18 09:06
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Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? & ~9 V9 R* ?4 P7 ^; ZChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.2 B% i2 z! e) s
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. * V' P7 B& X, D) ~You don't have to upgrade all the windows. Only the important ones.# g* l0 ]% a( s# [) R, q" j; g
小黄 发表于 2011-2-18 09:13