what is R factor? how do you have UV on the windows? 9 B# q/ ~, z# n4 c! kChiaPet 发表于 2011-2-18 08:53
j0 h' H4 W/ G% e( [8 dR factor is used to determine insulation capability. 8 |! m; Y; J( c& v( B; [4 r2 L5 A4 C* V4 e& H6 O" B
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.7 l6 @3 w, a9 a. i# _/ @$ i# t8 o
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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.7 h, N* @- ]! E; m& b
, ]* l5 U! A& f3 u7 Q7 cHere 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.+ y Y+ f/ t! c5 i
... : t- }2 ?8 h1 T5 k( H- e) m小黄 发表于 2011-2-18 09:06
! y" V" y+ |9 {( x- h4 GThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?. ~# N4 f" j' }" p% c+ z
ChiaPet 发表于 2011-2-18 09:09
- v& U8 j$ {6 D1 }Ask your builder to give you an exact quote.& C! U* m9 ]+ F1 o1 H" ^% u
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. ) `) u1 e% a2 E$ G6 t5 z& MYou don't have to upgrade all the windows. Only the important ones. 7 L$ N& l, d7 b$ G小黄 发表于 2011-2-18 09:13