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

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-23-2006, 04:26 PM   #1
Newbie
 
Join Date: Sep 2006
Posts: 8
Rewards Points: 10
Question

Rigid foam as floor insulation


I'm converting an existing screened porch (New Hampshire) into a 3 season room. The floor is 5/4 X 6 decking which I need to cover and finish. I only have 1 13/16 to play with until I come flush with the existing threshold. I was thinking about 1" thick foil faced rigid foam directly down on that decking and then covering that with 5/8 T&G plywood. That would leave me somewhere around 3/16 or 1/4" for indoor/outdoor carpeting or some other finsh. Here are my questions:
-do I need "sleepers" to keep that foam from crushing or can I just screw the plywood down through the foam?
-if I do need the sleepers, how would you space them?
The floor is 16' across the joists by 10' deep.
Thanks for your thoughts.
Rich

rkhpapa is offline   Reply With Quote
Old 09-23-2006, 07:47 PM   #2
Member
 
Join Date: Mar 2006
Posts: 2,083
Rewards Points: 1,000
Default

Rigid foam as floor insulation


can you install the insulation on the under side of the floor decking?

redline is offline   Reply With Quote
Old 09-24-2006, 06:33 PM   #3
Newbie
 
Join Date: Sep 2006
Posts: 8
Rewards Points: 10
Default

Rigid foam as floor insulation


That's my problem. There isn't enough room between the grade and the floor joists for me to crawl under there. That's why I'm trying to insulate it from the topside.
Thanks,
Rich
rkhpapa is offline   Reply With Quote
Old 09-24-2006, 07:06 PM   #4
General Contractor
 
Join Date: Sep 2006
Location: Illinois
Posts: 37
Rewards Points: 25
Default

Rigid foam as floor insulation


Supposedly, you just lay down the polystyrene foam insulation, then the top flooring and screw it into the joist. I've only used it under durarock and tile floor. I don't know what kind of effect it might have with a plywood top, and a space that large.
fqp25 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
why use paint brushes instead of foam brushes? joeyboy Painting 18 09-23-2007 06:52 PM
Rigid Metal Straight Threads rjordan392 Electrical 2 06-24-2007 12:42 PM
Best Ext. Sheathing: Rigid Foam An Option? austinbirdman Building & Construction 3 12-15-2006 10:02 AM
SPF Foam Roofing on Gables? WhyMeWhyNow Roofing/Siding 3 07-25-2005 06:31 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.