what is R factor? how do you have UV on the windows?6 A: U7 }% l. b1 ]3 B \/ C
ChiaPet 发表于 2011-2-18 08:53
) L' S! |( H0 Q$ n, I4 e- Y) S( vR factor is used to determine insulation capability. ( |* H+ a& c& @+ d/ Q8 k 2 J$ b& l: F% R! ^9 C1 z7 p0 OHere 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.& j0 @' m$ s2 j ^! U! z
9 N2 x0 W* L% b" FHowever, 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 + r4 k0 F1 J+ S
R factor is used to determine insulation capability.# O6 q6 c. e0 z5 e
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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.& J2 Z3 K* S. v4 z' i. L; {5 c
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小黄 发表于 2011-2-18 09:06
3 v/ F$ n, V# t: |Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?9 B+ d6 ~" H' H9 F3 {
ChiaPet 发表于 2011-2-18 09:09
" F3 V) k. Q4 y/ bAsk your builder to give you an exact quote.& K u9 E, C( }5 A3 g2 v
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. 2 F- L. p H2 e* z; j! g- |You don't have to upgrade all the windows. Only the important ones. 1 |& h0 E) \" X# I小黄 发表于 2011-2-18 09:13
5 w9 d$ B9 M9 }% n* E) W z9 _/ r5 X0 M* W* T- Ait must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.