what is R factor? how do you have UV on the windows?& J4 Z6 `" k+ f; d9 U
ChiaPet 发表于 2011-2-18 08:53
$ K. b( ]: n! S0 O V9 ]+ w3 x1 YR factor is used to determine insulation capability.) b) s! L1 ?4 P0 V
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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.. _ s- K: J3 y" j! | R) O/ Z
! a5 d. Y, j/ rHowever, 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. 0 M& m7 W- Z8 P. e& j. F$ V" _. S ; d( j; ]. S2 C3 R: U% L; \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.4 q$ d) ^, w0 `
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小黄 发表于 2011-2-18 09:06
4 ~% E- c( f" s4 AThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? $ B" T. u: v, O$ T3 VChiaPet 发表于 2011-2-18 09:09
8 O/ o; n3 @( d6 V$ H4 pAsk your builder to give you an exact quote. / x- e, _. D/ c" r, Y' p1 ?You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.% s& d: w4 a. q6 C9 |% i% J
You don't have to upgrade all the windows. Only the important ones. 7 n+ ?) e7 W0 }0 w3 Y" i小黄 发表于 2011-2-18 09:13
' |4 Y& d$ S, ?3 n# g$ } v7 B 3 }& V' i$ `; f$ A/ s% _! Git must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.