关于insulation的问题

Phaeton

昨天跟builder签了新房合同，注意到basement的insulation是R12，而普通外墙的是R20。因为是walkout basement，所以在想是不是需要把 basement insulation也upgrade一下。如果需要的话，想问一下懂的乡亲，大约需要多少钱？9’ basement ceiling，差不多1200尺大小的basement。在就是basement的padio door，是用sliding door好一些还是普通的门好一些。谢谢谢谢！

syz311

建议你用R20，至于价格你可去Homedepo或Rona查一下。
/ b8 I$ ~7 y5 ^7 x9 M3 j0 y, z$ ~建议你用Sliding door因其采光面积大适用walkout basement.

KochFord

应该用r40的,以后地下室的音响会很吵的

Phaeton

应该用r40的,以后地下室的音响会很吵的
KochFord 发表于 2010-2-10 11:53

insulation为的是保温，不是隔音，虽然知道它也有隔音的功能。您见过谁家有用R40的吗？？？

ceramistpalace

I would guess the walls where R12 is used are below grade (concrete foundation on the sides), that is why the builder does not use R20. Of course, R20 is better but the price increase will include the extra cost of switching from 2x4 wall framing to 2x6, on top of the price difference between R12 and R20. R40, for sure, is even better but it is usually used in the attic, seldom heard being used behind walls.

Phaeton

I would guess the walls where R12 is used are below grade (concrete foundation on the sides), that is why the builder does not use R20. Of course, R20 is better but the price increase will include the ...
ceramistpalace 发表于 2010-2-10 18:27

basement用的是friction fit insulation，不像屋顶，和外墙一样是fabricglass的，应该不用upgrade framing吧？然后仔细看了看，specifications上说exterior wall都是用的2“x6”的spruce，就是不知道basement的外墙的frame用的是什么材料。

ceramistpalace

6# Phaeton
) J; a8 v  Q. s! j$ j+ S* Q
/ Z' w) _9 `: h0 nYour house will still have below-grade concrete foundation walls on 2 sides and the front, a 2x4 frame on the inside of the wall  is needed to accommodate the insulation.(just like a regular non-walkout basement)

Phaeton

刚给builder 的sales发了邮件，希望破费不要很大。

9 H; t4 O  e! v3 V: d) R第一次盖房子，跟买一个现成的真的差很多啊！估计等真的盖好了，我也快成专家了

衣食住行

就我所理解的，做点评论。欢迎讨论
现在地下室都是水泥外墙，有足够的厚度阻挡热量外流。即使外面-50度，内墙的温度也会在0度以上（在不加热的情况下）。现代建筑一般地下室再加R8的Insulation就足够了。你的builder用R12已经是Upgrade了。屋顶用R40是近10来年的事。以前都是R32或更低的Insulation。
当然，如果LZ真的那么在乎绝缘性，你可以跟Builder提R2000Program。那是一种Certified System。
% ]7 @0 T8 ~( M) ^3 M. I6 M但高绝缘体系（包括现代的民用房建筑体系）有一个弱点，它是霉菌生长的主要根源。而霉菌是正常生活中对人体最大的危害。

Phaeton

sales刚刚回信给我，说是给我问问看。但是他说建议我不用升级，二是把钱花在basement的地面上比较合适。“Personally I would not upgrade the walls. I would put my money in the floor. On my last home I put 2x4 strapping on the floor and rigid insulation in between. I then put 5/8 tongue and groove plywood on top and Cork on top of that. Very cozy. Very warm on the feet.”

小黄

建议你用R20，至于价格你可去Homedepo或Rona查一下。
建议你用Sliding door因其采光面积大适用walkout basement.
syz311 发表于 2010-2-10 11:15

Sliding door 非常不好。不容易密闭。不如普通的玻璃门。

OOPP

sales刚刚回信给我，说是给我问问看。但是他说建议我不用升级，二是把钱花在basement的地面上比较合适。“Personally I would not upgrade the walls. I would put my money in the floor. On my last home I put 2x ...
% O# B, _! t1 p3 f$ r3 iPhaeton 发表于 2010-2-10 21:01

专业正解.

ceramistpalace

10# Phaeton
Should follow this suggestion if you are willing to spend a little bit more of money.

Phaeton

我也是这么想的。因为现在家里的地下室是地毯，但是踩在上面还是觉得很凉。像是大家说的一样，现在的insulation已经比以前好很多了。不过还是看看吧，如果upgrade成R20花不了太多的话，我就一起弄了算了。现在想想cork用作地下室的地板材料还真是一个不错的选择！