what is R factor? how do you have UV on the windows?3 ~3 b2 N+ Y1 a+ U
ChiaPet 发表于 2011-2-18 08:53
8 _+ m2 D$ ?3 U4 m% lR factor is used to determine insulation capability. ' X1 y- W) ~3 |2 R: j. `0 }5 v# S: w+ g/ L; K
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. 2 S6 n4 ]8 K; {( b* N7 b% i7 m5 x- M3 S' v% N* R( D, A m3 [/ L
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 * O; r( w) ^$ {% S7 M4 N L Z
R factor is used to determine insulation capability. * v' ?; A( e" s. { w: ^* G# _& e7 z0 i9 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. , i7 ` O* c: B* j ...9 Y& U$ M9 ^* d( ]" S- `7 J
小黄 发表于 2011-2-18 09:06
. S2 f, C; O; E- g) G1 `6 aThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?9 M6 J( G: h& p0 G& O0 N
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. / \; u0 w) _2 i6 ~! {9 `You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. 8 O7 I; K6 p$ `" D, Z$ gYou don't have to upgrade all the windows. Only the important ones.7 w3 s% T$ R( G$ v
小黄 发表于 2011-2-18 09:13
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it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.