what is R factor? how do you have UV on the windows?5 v1 T) C* _4 Y$ K
ChiaPet 发表于 2011-2-18 08:53
/ U# ?7 u$ t9 u' `) N/ U2 h, y) ZR factor is used to determine insulation capability.+ p( K* E) m/ P' V3 U; n
# v6 L! X( |/ ~5 OHere 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. / M3 |" f; y& A( o F/ U( l0 O$ V( Z, ?$ r
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 # x+ Z! U a% G# E
R factor is used to determine insulation capability.4 H" F8 x. G `' c7 u# E |$ V
: R: H6 U, c% ~3 M- c7 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. L' P; E" @! J3 c; C/ K% a ...$ B; d0 y- K; U/ @7 C
小黄 发表于 2011-2-18 09:06
( i/ O: [4 B. ~1 l$ c5 b
Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 1 g* X8 l& }$ [$ P" |ChiaPet 发表于 2011-2-18 09:09
5 P6 n0 `3 e1 s) qAsk your builder to give you an exact quote.# n' p% b- C& T ?6 M) x
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. : S3 C9 p& k$ s" {* C: H9 YYou don't have to upgrade all the windows. Only the important ones. ' p& h0 y; ?8 h3 G5 n: Y7 s小黄 发表于 2011-2-18 09:13
$ Z1 C( B" o+ a! S" d4 I+ ?8 l" O# P* n8 _( g
it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.