what is R factor? how do you have UV on the windows? ( {" A% p& y% v/ [ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. , W% g# I9 d2 K+ _3 J' R ) f1 D" J0 w3 H3 o( BHere 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. 2 k4 q& b/ z! Z2 k+ H 1 x- Z- K5 I0 Z0 ?* a6 r$ h8 VHowever, 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.: P) v) C: D. N, }& p
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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. 6 h; L R' r$ x# a0 M K ...6 d- ~9 L i* f1 |& d5 T1 L' T
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?1 O( M' p" Y: u) f8 R1 h
ChiaPet 发表于 2011-2-18 09:09
) o+ c G0 s3 }' uAsk your builder to give you an exact quote. 8 y; J5 I' O& X$ H% S NYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. / u# T2 [+ D3 d# aYou don't have to upgrade all the windows. Only the important ones. ?$ h5 v' F. n- y小黄 发表于 2011-2-18 09:13