what is R factor? how do you have UV on the windows? , A3 \' l' U+ N" m4 a7 `ChiaPet 发表于 2011-2-18 08:53
! t* S) w* Z1 t' C9 S) mR factor is used to determine insulation capability. % [" I( n" f1 v% P! H i6 m! _/ Y& x/ r4 [
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.2 ^! K |. v9 M( d# W- z$ ]
3 q! ~& E7 a( ]8 g9 I" U& i, u
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.
本帖最后由 ChiaPet 于 2011-2-18 09:12 编辑 7 J9 h0 O, U7 d5 c' `0 V! F
R factor is used to determine insulation capability./ o1 V3 M7 c4 `0 c& |2 b G
% ]( K4 c+ U0 qHere 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. ; K$ d5 D0 l& s% H- m7 Z ... ) z7 f' w# N( B, U" _小黄 发表于 2011-2-18 09:06
* Q9 J" i, D/ |7 H8 j% @6 o& ZThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? ! Y& u: [4 v8 b% {ChiaPet 发表于 2011-2-18 09:09
& i' C) s4 p7 K& `) O9 a: lAsk your builder to give you an exact quote.+ Q( W; u# r- ~; C5 ~# M
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.8 G3 t# }9 G3 W9 |" b( T) o
You don't have to upgrade all the windows. Only the important ones.5 e1 A, v. B; t% d" U/ Q
小黄 发表于 2011-2-18 09:13