what is R factor? how do you have UV on the windows?& P$ W4 n$ K- B( Q
ChiaPet 发表于 2011-2-18 08:53
- v8 e5 ^: p% t& Z' DR factor is used to determine insulation capability. 4 ?# k I* e+ S/ f3 b" y' g2 m8 u& Z2 g! P
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.* }- |1 w/ L% V/ p: H1 u& U
; D* \& i0 w* |3 [+ 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. : k; V& C1 u: N9 g$ ~- n% @8 n$ P0 o/ F+ \. ]
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.7 A- `: z% y1 O
... . r- _" w& }. P) i0 }: b( D小黄 发表于 2011-2-18 09:06
' S* e) n4 h: i, QThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 8 k5 k3 H. B& O5 P7 L; e( ]- N; UChiaPet 发表于 2011-2-18 09:09
& L! x! I/ o! k, v2 o+ F& j; rAsk your builder to give you an exact quote.' k- w1 k: N, n% F3 B
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. 5 p. F I0 ?7 S) z- t8 YYou don't have to upgrade all the windows. Only the important ones. % X- _& ?& U* b1 J+ ]小黄 发表于 2011-2-18 09:13
3 o: t1 ^( @. [7 K7 r' K 5 o" ~7 j" l: i% h3 q( x1 D4 j4 U; eit must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.