what is R factor? how do you have UV on the windows? 1 T& c' \8 @' k& h+ o6 UChiaPet 发表于 2011-2-18 08:53
( S, y% q( S- |% q2 u: G1 WR factor is used to determine insulation capability.1 C* f1 @6 }8 {# Q! {
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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. 8 D( y* b" Y; d. l* O& ~ # b+ K* e+ x; PHowever, 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., C1 I$ z4 B3 N" g& e8 F, o
2 g! G' v: u+ J" |& {' eHere 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. * M! _6 R5 n7 L8 h ...7 R D# K8 N* A
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? & z6 u& ^, X* `6 m4 F' [$ |% OChiaPet 发表于 2011-2-18 09:09
! X) a& ^4 Z/ ^- p# _6 EAsk your builder to give you an exact quote.& {! {. Q7 ?( ~8 t8 H/ o2 O% j
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.0 w3 }, L/ u* R$ F5 F
You don't have to upgrade all the windows. Only the important ones. + I# H. y7 C* E/ U+ o* N小黄 发表于 2011-2-18 09:13