what is R factor? how do you have UV on the windows? 3 r. ~& J' R6 i W4 qChiaPet 发表于 2011-2-18 08:53
/ G, F7 N! _) O7 a4 J# I2 S3 zR factor is used to determine insulation capability." l/ h! v4 t7 u( q8 k* m6 Q
. }$ _+ U( f F5 Q, J
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.% X: w8 ~# k$ \! a
& m4 ^1 L/ l5 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.
R factor is used to determine insulation capability.1 ^# |( T. v+ o- p: ]
5 }- G% q& J3 @5 V7 l5 F) N! DHere 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.4 U4 @9 m) i+ w* [" B6 \/ Q. D
... ; W( f; n( W6 ^+ W6 C小黄 发表于 2011-2-18 09:06
# o9 W9 s) C4 p6 h4 ~1 A9 S4 SThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 6 b# a- r s* ~+ Z, A S' SChiaPet 发表于 2011-2-18 09:09
! f, R4 j" o) K* P: DAsk your builder to give you an exact quote.( I2 z3 h# i( i/ P6 V/ Q2 h
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.# q- }. `- a4 B% x& g( w0 C
You don't have to upgrade all the windows. Only the important ones.. }* y$ ]" [0 R
小黄 发表于 2011-2-18 09:13