what is R factor? how do you have UV on the windows?+ Q9 G7 j5 a7 w& t8 ~
ChiaPet 发表于 2011-2-18 08:53
" y7 I/ }( l; o2 d+ L& G9 NR factor is used to determine insulation capability. ! }( w F5 ^ \& J5 \3 l2 d) J" g/ t6 ]
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.3 E' ^" M- M- X4 C4 D3 |
0 @0 u2 V5 y. u) }! t q/ C/ aHowever, 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. : X- A N+ ]! `/ d7 R8 C! B6 v9 S: S3 T% |; v
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.( `' Z6 s/ o2 d; k2 ~
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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?" ?- F! i, Z+ J1 z5 d9 M, Q
ChiaPet 发表于 2011-2-18 09:09
# [' q2 w4 ^1 _" MAsk your builder to give you an exact quote. $ N! u% ^; {" i% ^3 I) |You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.7 n: |( Q9 o; D/ n6 f
You don't have to upgrade all the windows. Only the important ones. 8 O- } W; f( E! R/ y* Z" K; F5 l* Y小黄 发表于 2011-2-18 09:13
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it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.