what is R factor? how do you have UV on the windows? . i: L6 J+ ^+ e" V! WChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability. ( p+ }# q8 G4 y2 g) i3 R# K+ p 8 X1 _ Q i2 X* X0 q" rHere 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. 5 Q) R; Z! {+ g& t% W% s8 a, \% n6 P. Z$ |7 h
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 $ @8 Y* v5 u8 w3 N \. r0 N
R factor is used to determine insulation capability. 4 L1 J6 R# g2 { G4 f8 t, a' ^7 s3 [1 X$ v
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 J ?0 a9 r7 O5 m ... ; A/ v6 y$ F0 t2 V小黄 发表于 2011-2-18 09:06
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Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?2 E$ I6 A+ z. x7 K& T" p# Y
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote., l3 N' t4 t0 `0 c8 J) O/ b& N
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. + H- I- l8 S @4 cYou don't have to upgrade all the windows. Only the important ones.% j- x3 s! g" {3 h: L7 L
小黄 发表于 2011-2-18 09:13
4 e$ M) d% v; |0 {" n6 ~ . z8 ~# ^/ W: u& g% V* O+ x$ P- Wit must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.