I'd like to know what folks are seeing in the field, with respect to the protection and aesthetics of slab edge insulation. What material is used to protect the board insulation? Pros/cons? Trim details at cladding/foundation transition? Illustrative photos?

Tags: insulation, slab edge

Views: 889

Replies to This Discussion

Sorry for not getting back to this sooner but I generally use the foam for the forms / edges & leave it in place - To finish it off we either use a spray on water proofing material which can be painted, or run hardi board & finish off with stucco, paint, etc... mind you we don't do many as we primarily focus on remodels, (and most houses are on crawls or basements in this area) but that is what we have done on the past.

 

Sorry I don't have any detail drawings handy, but as I recall GBA or BSC has had some good ones & other available options.

Hi Isaac.

I am a builder of energy efficient homes in Montana.  Western Montana is about 7700 heat degree days and we typically do not need air conditioning due to night time heat loss to the sky. It is a dry climate, too. Right now I can see a big tall column of smoke in the Saphire mountains from a forest fire. 

I have been cutting off one side of my insulated concrete forms to allow the slab to overlap the icf stem wall.  We have frozen ground in the winter so frost level is about three feet down, where we park our footings.  By removing the foam from inside the icf stem wall, it changes the r value from 22 to 10.  Many of these slabs are heated with radiant tubing so an even greater heat loss can happen.  Most builders here are doing crawl spaces and do not have a clue how to construct a slab for a home properly, let alone a crawl space. To do a crawl space right, it is a hell of a lot of work.   I favor slabs because of several factors.  I don't care if they get rained on , they do not squeek when steped on, do not rot, can be chem stained, can be a heater via radiant pex, and have lots of thermal mass.  So I do stem walls three feet down and spend money backfilling and insulating my slabs. 

Several good builders here are now building the walls of their homes thicker.  Some are ten inches to twelve inches thick.  Because of the thicker walls now we can fit more foam on the slabs' perimeter and still get the load berring to work.  I did one wall 22" thick and was able to get a slab perrimiter R of 40 with ten inches of the eps foam.  This was a double 2x4 wall and the load transfers down the outer 2 by wall. 

To protect the foam, I use steel coil stock in whatever color the homeowner likes.  We screw this to the plastic ties of the ICF wall.  I have used synthetic stucco over a cement stucco brown coat, but that was a lot of work.  Some builders use a vinyl soffit product here.  Others use fiber cement siding products.  I have two homes, a kind of his and hers life style.  The main house is a slab and the cottage is a crawl space.  The main house has the advantage of thermal mass and I see this work durring certain weather conditions.  In the fall the slab will hold the days heat while my cottage is colder.  And I have three feet of cellulose insulation in the attic of the cottage.  When I came home today from work to the cottage, it was 80f out side and 67f inside.  We think 80f is hot in Montana.  Thanks!

Terry Davenport 

Great info Terry - Thanks!
You may want to check Energy Edge forms. Great product. http://www.energyedgeform.com/

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

Everblue posted events
2 minutes ago
Mst. Fatema Aktar is now a member of Home Energy Pros
8 hours ago
Robert Leone added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Blower Door Package for Sale

Hi,I am selling my blower door with extras as a package or individually. These items are used but…See More
15 hours ago
Profile IconRobert Leone and Richard Vito joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
15 hours ago
Richard Vito joined Sean Lintow Sr's group
Thumbnail

Best Practices (Residential)

Best Building, Retrofitting, or even Auditing Practices - what are they, what should change, what…See More
23 hours ago
Richard Vito joined James Sayers's group
Thumbnail

Marketing Energy Efficiency

Sharing ideas, tools and examples of promoting energy efficiency to consumersSee More
23 hours ago
Richard Vito joined Allison A. Bailes III's group
Thumbnail

HVAC

HVAC design, Manuals J, S, T, & D, Duct leakage, Air flow, ENERGY STAR new home requirements,…See More
23 hours ago
Richard Vito joined Kyle Brown's group
Thumbnail

Wrightsoft - Manual J / Manual D

If you use Wrightsoft to calculate loads or design ducts, you likely have questions.  Get answers…See More
23 hours ago
Jim Gunshinan commented on Jim Gunshinan's blog post Energy Upgrade California—Up Close and Personal
"I had a revelation while attending Bruce Manclark's session of duct leak testing at the Energy…"
yesterday
George J. Nesbitt commented on Jim Gunshinan's blog post Energy Upgrade California—Up Close and Personal
"Blower Door; the 2007 test was a depressurization test, and the 2014 a pressurization test, which…"
yesterday
George J. Nesbitt replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Plan, plan, plan, plan. The 1st step to is to understand the house, how it's built, the…"
yesterday
George J. Nesbitt posted an event

High Performance Windows - A Panel of Experts at Pyramid Alehouse`

April 26, 2014 from 3pm to 5pm
Join a lively panel discussion on high performance windows. We'll cover some basics, as well as…See More
yesterday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service