Insulation for 3-season porch floor


  #1  
Old 02-16-08, 04:59 PM
D
Member
Thread Starter
Join Date: Jan 2003
Location: USA
Posts: 169
Upvotes: 0
Received 0 Upvotes on 0 Posts
Insulation for 3-season porch floor

Hi -

I am thinking about turning a 3-season porch into a 4-season porch. I can easily get underneath the porch, where all the floor joists are exposed. I would like some advice on how to best insulate the floor - use 6-8 inch thick fiberglass insulation, and cover with some kind of thin plywood just to protect it from the weather, or use Styrofoam insulation, which may or may not be covered. What would be best? If I went with the Styrofoam, do you think the entire depth of the cavity would need to be filled (I guess that would mean having a double or triple layer, since I have only seen it 2 inches thick)? Other than cost, are there advantages of one over the other?

Thanks - Dave
 
  #2  
Old 02-17-08, 08:31 AM
airman.1994's Avatar
Member
Join Date: Dec 2005
Location: VA
Posts: 5,795
Upvotes: 0
Received 8 Upvotes on 8 Posts
As far as best closed cell spray foam is the best. Your two options are about the same. you will need to cover both with something like ply wood. If you use the foam two layers should be fine.
 
  #3  
Old 02-24-08, 03:03 PM
D
Member
Thread Starter
Join Date: Jan 2003
Location: USA
Posts: 169
Upvotes: 0
Received 0 Upvotes on 0 Posts
Radiant heating in floor as option?

Hi -

My nephew was just here. He suggested, instead of just insulation, to run radiant floor heating in the porch floor instead. I can get up underneath, possibly run the lines myself (with advice), and have a plumber come in and hook it up to a heating zone we have just in the next room.

How hard is this stuff to deal with?

Dave
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: