what is R factor? how do you have UV on the windows? 6 y7 e' G+ Q5 k: u" v3 n2 uChiaPet 发表于 2011-2-18 08:53
* x5 R& u0 Z$ O" V3 r2 v+ o& C
R factor is used to determine insulation capability. H" [: T! b! z
& }' }6 Z' z6 [: H! j8 B2 UHere 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.0 A2 C) G# x( |5 |* D1 Z% z2 Q
) K, V5 Y0 i# X. D0 z$ s
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.5 B2 N4 n- w/ L% ?( u# b, z6 o H
) @2 t% J) l# ^1 Z
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. & A6 ]2 h& C; a ...$ \8 ~) h0 C$ u: H5 K7 D
小黄 发表于 2011-2-18 09:06
( ?) z# j' b/ ]+ F3 E
Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?' ]8 Z5 J4 K J2 u+ S( V
ChiaPet 发表于 2011-2-18 09:09
9 H! k8 e* f" Q4 e# l+ }& u2 J% vAsk your builder to give you an exact quote. 6 F3 F8 U* G4 ~7 Y! O; u PYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. # K# |8 Z! u$ g& e( l( mYou don't have to upgrade all the windows. Only the important ones.0 g }! Z1 [! B8 u
小黄 发表于 2011-2-18 09:13