Insulating A Slab W/o Footer For Greenhouse - Building & Construction - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction


Thread Tools Display Modes
Old 04-17-2010, 02:55 PM   #1
Join Date: Apr 2010
Posts: 4
Rewards Points: 10

insulating a slab w/o footer for greenhouse

Hello All-
I am in the design phase for converting my south facing patio/porch into an attached greenhouse. The existing porch is post and beam (6X6's). The posts are bolted to a floating 6" concrete slab on grade without any footer or insulation. I intend to use all the existing porch wood for the greenhouse. I need to anchor the posts to a proper depth below the frostline. The existing slab would be the floor of the greenhouse. My question is how can I insulate the floating slab (and the new concrete pier/post foundation). Can I trench the perimeter of the slab to the frostline and install rigid board insulation vertically to grade? Will the insulation stand up to frost heaving?
Attached are pictures of the porch showing post and beam design and another of the corner post attached to the slab.
Any information is welcome. Thanks.
Attached Images


dc loud is offline   Reply With Quote
Old 04-17-2010, 04:33 PM   #2
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Rewards Points: 2,000

Where are you located ?


Scuba_Dave is offline   Reply With Quote
Old 04-17-2010, 07:04 PM   #3
Join Date: Apr 2010
Posts: 4
Rewards Points: 10

I am in western Colorado at an altitude of 6700ft. We have cold winters and hot summers with 300+ sunny days a year. Our frost line is around 32".
dc loud is offline   Reply With Quote

greenhouse addition , insulating floating slab

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Concrete slab to foundation work tntgarv Building & Construction 3 02-28-2010 12:23 PM
Insulating Cold Storage below slab porch Chemist1961 Building & Construction 1 12-09-2009 08:20 AM
insulating exterior of concrete slab home.. rvegab00 General DIY Discussions 5 10-15-2009 09:26 PM
Footer not even with slab gmanas Flooring 8 03-31-2008 02:15 PM
Insulating a radiant heated floor (below slab) -- use foam board? drh HVAC 2 01-14-2008 03:42 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1