what is R factor? how do you have UV on the windows?/ a: S$ W n" M, g- h2 @' N
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. 2 C0 l% j+ I( L* X& x. L- [" p1 u) w% t' |3 n
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.: P+ |" R8 [( G4 k6 l
+ @6 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 % d! V# |8 m1 D$ k' h& W
R factor is used to determine insulation capability. , ~0 ^6 {1 E3 `2 m! i, K/ o & [0 b2 r4 Q. j0 S; l1 |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 ? v( q5 Z) X! d ... $ W0 I" s4 [, F, z) U/ A) j小黄 发表于 2011-2-18 09:06
3 e8 W% _1 D% m* D+ F% mThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?! n. G' T; K" Y# u* B9 B
ChiaPet 发表于 2011-2-18 09:09
! Y$ d7 T7 e& \0 l1 B4 G6 mAsk your builder to give you an exact quote., V+ }) s" R" N- v9 F
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. + w, Q j- L1 nYou don't have to upgrade all the windows. Only the important ones.; @1 ^/ w5 S/ }! Y& P: p
小黄 发表于 2011-2-18 09:13