what is R factor? how do you have UV on the windows? 6 v0 X$ @9 o; ? y& uChiaPet 发表于 2011-2-18 08:53
( o/ v3 ^% `) ]: Y% a; @* t( MR factor is used to determine insulation capability. " S9 M# z3 O0 r6 P% v! ]9 D 7 H k4 F" W( 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. 1 R+ i' c }$ L- _# l6 m# c+ d$ B, R. M" A+ M+ v3 O) ?
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 ) @# I9 N( y% F/ O V9 I8 ]! s
R factor is used to determine insulation capability. ' P% T* O3 x+ L2 E$ I9 M; Q; r% w ! i* G6 m) o3 E! [, i; p3 ?6 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. 5 N$ N( V3 S& f: W* l# N ...1 N/ G7 G9 s6 y8 f# x
小黄 发表于 2011-2-18 09:06
& R4 }3 B' `$ `4 n) ^4 G6 n, K% tThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 5 x `6 e7 g& U) K8 I' tChiaPet 发表于 2011-2-18 09:09
& C" N$ C- X4 G p& Z- J5 dAsk your builder to give you an exact quote. 7 k2 c! i. `4 i1 o! P, sYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. - W3 Z9 y+ Q# K* Z2 G8 LYou don't have to upgrade all the windows. Only the important ones. 0 O7 t' x1 b) x% [% |9 \! h" H小黄 发表于 2011-2-18 09:13