what is R factor? how do you have UV on the windows? k2 N) K X- ^- \ O
ChiaPet 发表于 2011-2-18 08:53
0 F2 d7 [( [: h7 S" qR factor is used to determine insulation capability. ( A$ i+ P, t( m+ N! n* C% U8 P3 y* T! \! _' t" i D( V V1 X0 ?0 O
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 J7 A3 R& u0 ~
f4 X$ D- ~- p& e$ c* v5 d+ @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.$ H! w# W+ m n+ y
& T9 r; x) v& v 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. $ a1 G! G3 \1 I4 K, y7 I$ ] ... - w" A$ x1 i; [# I4 s- Q小黄 发表于 2011-2-18 09:06
1 v' Z8 U! T/ k/ [% MThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? + {: M- P: Z1 K! f- Q8 iChiaPet 发表于 2011-2-18 09:09
& Y- X/ G; c5 C* T9 |9 v' e/ W2 ^Ask your builder to give you an exact quote. ) x9 {1 e( R* w, f1 q8 JYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.: ]. r( @0 j0 E: p5 a
You don't have to upgrade all the windows. Only the important ones.2 B8 C6 y9 t) V. n. C' P6 f: I1 c/ K
小黄 发表于 2011-2-18 09:13