what is R factor? how do you have UV on the windows?' Q9 N* G+ U4 o0 E
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.7 Y5 U5 f7 m1 S# p- s& [ C1 ?. f
/ ~* M" q1 E$ A# x( ]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. [ y8 ]! ^. E ! N+ y. L+ n, G6 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.% G: z: Q8 @4 X& C! M: G. u
' h$ F' m$ j+ u( I/ U i0 k& EHere 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.5 q7 a* T4 P- a
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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? " y1 [' O0 v0 Z- o7 eChiaPet 发表于 2011-2-18 09:09
, j4 X: o- Z* w/ S8 vAsk your builder to give you an exact quote. + \' n" r' e- q, CYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. % h, U- e- P' n; q) WYou don't have to upgrade all the windows. Only the important ones.. D5 |7 S! p6 {1 l4 a$ A' |8 f* |" Q
小黄 发表于 2011-2-18 09:13
+ o3 E* w' O- F . O/ _# V9 u7 I9 T. j+ E. M [1 Nit must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.