Dry Laid Stone Foundation - Exterior Treatment (via John Nicolas)

How do you treat the outside of a stacked stone crawl space wall?  I have specified 2 part spray foam for the inside.  There is much evidence of rodent entry and exit inside without and visible holes on the outside.  What types of work do people specify and what about some cost estimates?

Tags: Foundation, Masonry, Rodents, Stone

Views: 509

Replies to This Discussion

If the dry stack is in good shape, I don't recommend messing with it except to fix any slope / drainage issues around it - if it isn't you need to get a stone mason to look at it.

 

This is a case where it is best to handle the issues from the inside, generally with infloor drainage, dimpled drainage mat, and closed cell foam. I am assuming you are looking at going with a sealed crawl space seeing you mentioned the foam

 

As for the critters I am going to cheat & point you to an article I did on keeping squirrel's mice & raccoons out of the house

Hi John, John, and Sean,

Once the structural issues as Sean mentions are out of the way I have suggested in the past that the inside be sprayed or hand mortared to fill all of the gaps so that the critters will not find a soft foam filled way to regain their access.  Foam applied from the inside does look nice, but would not be effective on critters, at least the ones I have had to deal with.  

As for cost, a mason would not take that long, especially if the surface was going to be covered with foam.  If the pool guys were not bust, they spray pools in a similar fashion and perhaps their material would be suitable.  Stucco applications might also be worth considering depending upon your area.  So, whether it is by hand or machine, an inch or two of mortar in those gaps should work well to eliminate the unwanted guests.

 

Bud

My 1850's Greek Revival has a dry stone foundation. I sprayed the inside from the floor to the top of the rim joist with 2.5" (R-15.5) of closed cell foam but did nothing to the outside (granted, the dry stone foundation was only below grade but had granite foundation stones above it). After two winters, there is no sign whatsoever of rodent entry, whereas before they were all over the place. It appears they don't like the stuff. The foam was ComfortFoam from BASF covered with a code-required flame retardant paint. Total cost: $5665 for a 2862 sqft house (sorry, I don't have the square feet of foundation area).

 

David

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

Profile IconDale@EnergyWright and Maria Lacey joined David Eggleton's group
Thumbnail

1000 Home Challenge

Linda Wigington distinguished between deep retrofits & deep energy reductions, thus expanding…See More
40 minutes ago
Profile IconAdam Swain, Cynthia Sandherr, James Skeldon and 2 more joined Home Energy Pros
44 minutes ago
Tom White posted videos
9 hours ago
Maria Lacey replied to Linda Wigington's discussion Low-cost electricity monitoring: Accuracy & Applications in the group 1000 Home Challenge
"I attempted to use an AZTech device. I have used the Watt Stopper, Watts Up Pro, Kill-A-Watt…"
13 hours ago
Andy Li replied to David Parker's discussion Energy auditor equipment for sale- blower door, duct tester,combustion analyzer in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Is Minneapolis Duct Blaster still available? send some photos and how much do you ask for? my…"
18 hours ago
Andy Li 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
18 hours ago
Hal Skinner replied to Richard Beyer's discussion What's your opinion on the best insulation option for your GREEN attic space?
"Mornin Richard, Maybe 'Options' might be more appropriate here?  We take the path…"
20 hours ago
Richard Beyer posted a discussion
21 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service