what is R factor? how do you have UV on the windows?/ ^! O8 P7 u0 L2 C
ChiaPet 发表于 2011-2-18 08:53
) R% ?1 \# `9 }) A2 YR factor is used to determine insulation capability. + x% s4 b; u6 e+ S5 w5 g" ~4 A$ m2 G; e* O$ R; r' O! q
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. # {; U! c: r( r( _% ?9 V+ t: U0 b9 d- Z5 [2 q$ j8 {
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 v" \; x; M. q. K
R factor is used to determine insulation capability., |" B$ y6 N) I6 V+ f2 r/ F
& _3 n; s% e0 ~- h, s$ \ {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 {0 q8 W4 b5 L+ W9 b+ Z) W! w ... 8 J1 v2 L/ T! @- n+ E' U- o; R小黄 发表于 2011-2-18 09:06
, t, y. [# r+ i" Q9 g- |8 _$ ^Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 4 V7 F9 @% ~9 @2 { gChiaPet 发表于 2011-2-18 09:09
* q; T* I" e$ i! D. X( @
Ask your builder to give you an exact quote. ! O7 O9 | @* _3 z8 |' E [You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.* h: m1 O5 a ^6 y* g- f
You don't have to upgrade all the windows. Only the important ones.( D6 P4 x7 i r C; Q
小黄 发表于 2011-2-18 09:13
5 W: q& T0 X% G, g& A/ U1 i1 C8 N' {' ]' {- L4 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.