what is R factor? how do you have UV on the windows? 0 T4 C7 ^3 e \$ jChiaPet 发表于 2011-2-18 08:53
/ B( F& ]4 h$ e. s
R factor is used to determine insulation capability. ! c# }$ R: x9 W* V: g& c6 V1 p! m! X, e# d7 G s- a
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 |% R4 x- H, I: k9 m5 n. R% z6 c- D1 [. S0 o
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.
R factor is used to determine insulation capability.; m# m$ n. W& L: I9 o+ [/ c9 q
0 d! D, y' T3 O' h7 {
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.) c; M6 P4 a' D0 z
.... \5 t9 w0 k* ?( n) T* v+ o' Z
小黄 发表于 2011-2-18 09:06
/ a5 S5 y1 g+ ~& s& GThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 8 L: S0 h. {4 D7 yChiaPet 发表于 2011-2-18 09:09
5 \2 Q& N6 ~: U- U, qAsk your builder to give you an exact quote.; e1 Q2 R! x! Y m' Q2 I; G* X
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.: g: n O: D/ m5 D) _
You don't have to upgrade all the windows. Only the important ones.1 \5 U7 L" B" m
小黄 发表于 2011-2-18 09:13
6 l) ` J+ V9 a0 z5 K2 Z$ U " S% u" y, P% o6 f5 nit must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.