what is R factor? how do you have UV on the windows? h5 e% W' T" I8 |: _
ChiaPet 发表于 2011-2-18 08:53
! ~ y1 r# ~- ]% W& O+ E
R factor is used to determine insulation capability.9 O# l6 }+ ~; B& v. W) m. _; q0 _
4 \ W/ P& h1 F: e$ {) aHere 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. 9 T: a+ c# e7 I5 b# z2 x& n# a: \/ ^- C' E& A
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. ) S9 V2 t h9 Z5 g2 m* B' H1 ~5 H' P9 [) E, 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. & o! y. R, D( H% k! Y; b ... ` B" }2 p' {
小黄 发表于 2011-2-18 09:06
( N4 a3 @) N3 P6 W% j
Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 9 l; S6 D. b5 L- a( @ChiaPet 发表于 2011-2-18 09:09
- _; a9 v% A/ g" J/ H4 F& wAsk your builder to give you an exact quote.5 } a# C# k7 r4 K0 B; [) j$ ?! w; H6 b- h
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. ) ^5 e& `+ c7 eYou don't have to upgrade all the windows. Only the important ones.. ? R j/ l' t$ g
小黄 发表于 2011-2-18 09:13
& a9 o2 ]. F# \/ c. f
! I4 D. g- U' Y5 x6 P% X5 t& m
it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.