what is R factor? how do you have UV on the windows?( u0 B" W. y* o
ChiaPet 发表于 2011-2-18 08:53
; E: F/ v# ~+ q3 {. P8 U, J& cR factor is used to determine insulation capability.! t2 z1 l6 j9 Q& q0 |6 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. * U ]2 x* F& x O a/ b9 ~/ S9 W( Z2 q4 U) K& V& K
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. # {, L5 ~2 r- Q/ I8 T+ H+ g & [4 h6 P" a6 ?, _- kHere 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.& ]8 R3 K7 g- {" y/ [7 ]9 {- H# L, ~
... 4 n _* E, p& Z0 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?2 c2 `/ }3 n2 i) ` t3 U7 `
ChiaPet 发表于 2011-2-18 09:09
$ L# n8 ?6 Y; Q/ XAsk your builder to give you an exact quote.: D4 K% V6 g7 p7 l. O) j
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. ( g$ S' v/ Y9 }# B8 t4 P6 _' }You don't have to upgrade all the windows. Only the important ones.4 [, ^" Z' W8 ^3 R
小黄 发表于 2011-2-18 09:13