what is R factor? how do you have UV on the windows? * i& h3 t8 [1 C* R1 G9 aChiaPet 发表于 2011-2-18 08:53
; n4 _" A- q5 j0 r6 j8 d( NR factor is used to determine insulation capability. 0 V- \$ M. S; f. |! A: o# s9 }* r7 l* l5 A! B3 h
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. 9 G6 ?" T$ D1 G; m6 N; e( S5 d, S; C0 p# y3 E0 G
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. A! Q* J. }$ i+ H2 ` s
g& G2 g9 M+ ^) ?* T
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 ]% q& v& a# e+ V0 [ ... 6 w" {- V8 h9 N; K( k/ @小黄 发表于 2011-2-18 09:06
# t6 a3 `, [$ e; q* J ]1 A
Thank you for your reply. But would sun-stop coating cost too much?
Ask your builder to give you an exact quote. $ y C( U2 u O. g5 y( R4 Y' v( jYou don't have to upgrade all the windows. Only the important ones. 3 f% P# O( ~$ L9 e, B8 m8 O小黄 发表于 2011-2-18 09:13
! R. I5 S4 b. L# k- b( A/ d' A# @3 k" i3 A q2 |
it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.