what is R factor? how do you have UV on the windows? / h7 C% n8 G' H" M& |9 MChiaPet 发表于 2011-2-18 08:53
* a, N# S. a! z B9 e" XR factor is used to determine insulation capability. " n; x1 {6 \+ ^9 S% f * w/ |- ]% T: e5 K, JHere 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.) ]( a6 Z* F* d
. Y8 |, `8 \$ f MHowever, 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.( I, K+ p' A0 d k- j. @
" A$ ]1 M% k6 D7 D! }# aHere 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. ; [7 w' K2 G: X( C" R4 ]+ Q ... u, p3 R& c" y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?0 X$ I! Q5 K0 x/ x1 m6 v3 ~
ChiaPet 发表于 2011-2-18 09:09
; ?1 ^2 i5 d: f( X! O3 A! BAsk your builder to give you an exact quote.# l$ [+ T" X/ @. F( U
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. 0 Q- c3 Z4 @% y- hYou don't have to upgrade all the windows. Only the important ones. : j1 H$ i' k. Q: v9 d+ U3 |2 Y小黄 发表于 2011-2-18 09:13
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Will do. Thank you.