Greetings everyone! 

   I was hoping I could get some feedback with a building I am working on. The existing concrete was a 3 inch "homeowner special", so the plan is to set 2 inches of rigid foam, tubing for radiant heat, and four inches of new pour concrete.

1.) Do I need anything between the insulation and the existing concrete?

2.) The radiant pipes have ties to attach to the iron rods for the concrete, so I can only imagine that the metal goes first, then the radiant...

3.) How do I protect the rigid foam from damage from walking on it to do the other steps?

4.) Does the rigid foam boards needs to be taped between each other and to the end of the block?

This is a very exciting project and your feedback is greatly appreciated, 

    Luis

Tags: board, concrete, floor, foam, heat, installation, insulation, radiant

Views: 152

Reply to This

Replies to This Discussion

What is the issues with the "homeowner special" concrete - wavy, falling apart, or... That can easily change some answers depending on the severity 

#1 - generally not needed, though sometimes you might need a floor leveler, maybe even a crack/moisture isolation membrane

#2 - Personally I like having the radiant around the halfway mark in the slab with the metal though many simply attach it directly to the foam like is shown here http://blog.sls-construction.com/2012/common-sense-building-radiant...

#3 - use the proper foam & it can handle it - should be a high density closed cell foam

#4 - that is a very good idea

One last tip - make sure you have the pex lines pressurized while you are doing this and check them as you go - last thing you want to do is find out you have a leak after the concrete is set, while messy it is easier to fix now then later

Not sure if this would have any bearing on your project at all. Thought I would mention it though.
When we apply our coating on new concrete walls or new stucco, we always have to test the Ph level first. It must be no higher than 4, we prefer 3 or below. With concrete or stuccvo that is 5-yearsold or older, rarely an issue. Less than 5, many times an issue. It causes major bonding problems.
Again, not sure if a high Ph level concrete would cause issues with your foam or not. Possibly???
Some paint companies make a primer for high Ph surfaces. Might be a good thing to look into. Will a high Ph level concrete eat the foam??? I dont know, thats why I'm bringing it up.

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Hal Skinner replied to Hal Skinner's discussion The 'Touchy - Feely' sales pitch. in the group Radiant Control Coatings
"The 2nd bestsales tool I ever came up with.  aI will be happy to send anyone a test strip like…"
25 minutes ago
Patrick Michaelyan joined Hal Skinner's group
Thumbnail

Radiant Control Coatings

A group where people who work with radiant control coatings can share their success stories and let…See More
2 hours ago
Joseph Lamy posted a blog post

After 70 years on the fence, knotty LED light fixtures hide the Ductless in splendor

After the first week, the ductless heat pump and I became so close that could never even think of…See More
6 hours ago
Profile IconHome Energy Pros now has Member Map
6 hours ago
Profile IconLaura Spencer and Ann Griffin joined Home Energy Pros
6 hours ago
Tom White posted a video

The Animals Save the Planet - Energy Efficient Penguin

"Energy saving bulbs use one fifth of the energy of ordinary bulbs." Help the animals save their planet and ours, use energy saving bulbs! http://fartingcow....
10 hours ago
Laurie DiDonato posted an event
Thumbnail

Hybrid HERS Rater Training at Online + Manchester, NH or Berlin, CT

September 22, 2014 at 9pm to October 10, 2014 at 7pm
Online Component- September 29th-October 10thChoose from 2 Classroom Sessions: October 27-30 –…See More
13 hours ago
William Reid replied to James White's discussion What happened to Home Energy Pro's website?
"It appears that a Plugin called HTTPS Everywhere was stopping some of the content in my case."
13 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service