what is R factor? how do you have UV on the windows? z! v" x3 e, bChiaPet 发表于 2011-2-18 08:53
2 m \- c! x' rR factor is used to determine insulation capability.* o9 z* X8 P" n! P% |& K0 I6 z
# q+ W0 H3 e- ~& A/ }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." M3 f" E5 I/ g4 I+ j6 l( E/ [" a
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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.
本帖最后由 ChiaPet 于 2011-2-18 09:12 编辑 / |2 I8 ?# @. Q; I8 {+ G. F
R factor is used to determine insulation capability. 3 K, }! ]" ` h. s4 C" y4 J* J, g- R5 U0 P* G* ?& m: U
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. 1 x# |* N# _8 j, |" C: m# | ...1 v7 M; y& e% z% q) T6 _9 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?3 K7 f) ^+ P: T) j" y) e- ]3 `) z- s
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. 1 Q5 S- }5 z$ H( WYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.: f- h8 l0 k! ]7 q' H1 {
You don't have to upgrade all the windows. Only the important ones. - q$ A4 k. I( w% }; G小黄 发表于 2011-2-18 09:13