what is R factor? how do you have UV on the windows?$ L* E Y# Y+ q2 v8 _5 t1 A* j
ChiaPet 发表于 2011-2-18 08:53
9 J, u. p9 u) y: D* MR factor is used to determine insulation capability.: W5 L& \+ e% M- a6 g$ X. F7 i
, R3 {# ]$ G2 D9 T7 S* pHere 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 G( x$ }+ a% K* t 3 L( j! l- m( fHowever, 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.0 A9 N: P1 p% v4 ^: | Z
/ N% N0 v2 n; U, |3 d
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. . C8 d8 P& y, a0 p7 I5 E ...( Z' v1 w, R8 a5 z! x9 u7 F7 Q/ `
小黄 发表于 2011-2-18 09:06
3 w6 j- L, I1 o/ g! Q, Q W
Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? K* a6 `& S. J9 l6 WChiaPet 发表于 2011-2-18 09:09
6 X; H5 O( U# NAsk your builder to give you an exact quote.- E. W2 E- |( _- ]) [" Q0 u" H
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.# w/ ]8 G: t# |- w* I" Z) e9 ~
You don't have to upgrade all the windows. Only the important ones. 9 X8 |) c; h9 Z1 G! X小黄 发表于 2011-2-18 09:13