what is R factor? how do you have UV on the windows?0 G9 |) z( E6 ?
ChiaPet 发表于 2011-2-18 08:53
4 v' W3 S! l2 H5 PR factor is used to determine insulation capability.3 @5 R. D) J( M9 [; v/ d+ [2 Y
+ H$ d- m# L. Q3 F, ~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. & o, |1 {4 C, e3 j6 F& H# s: b6 D1 i
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.
R factor is used to determine insulation capability. + }$ L& F# @% H' Q8 u, E9 s( U+ S$ H5 B* s+ q* B
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." A4 _' U9 L" W
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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?7 O, H7 ^' `4 r5 l: G* |7 L. x
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.+ y- l( b: x+ F* O' B, L
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.5 W5 h# ^9 |/ w
You don't have to upgrade all the windows. Only the important ones. " I2 B2 d. u/ O; U! q4 U/ F小黄 发表于 2011-2-18 09:13