Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Carpentry

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 12-03-2011, 06:24 PM   #1
Newbie
 
Join Date: Dec 2011
Posts: 3
Share |
Question

Garrage attic subfloor


Hi all,

I am thinking about putting a subfloor in above my garrage. Currently I have a drywall ceiling with just 2x4's and would like to store things that are light like clothes and kids toys in this space. I have one major concern and that is if this setup will support what I am want it to? and also what kind of plywood or OSB should I use for the floor? Oh yeah there is no insulation in case anyone needs to know this.

I dont care about drywall cracks since its the garrage or a little bit of floor warp.

Marke016024 is offline   Reply With Quote
Old 12-03-2011, 06:40 PM   #2
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 25,893
Default

Garrage attic subfloor


That means it's nonstorage trusses. There never intended to have any form of storage on top of then. It you do they may crack.
If you insisting on using it for storage then sister 2 X 8 to the 2 X 4's from on top of the outside walls and screws and constrution adhesive them together and use Advantex subflooring.

joecaption is offline   Reply With Quote
The Following User Says Thank You to joecaption For This Useful Post:
Marke016024 (12-03-2011)
Old 12-03-2011, 06:42 PM   #3
Member
 
Join Date: Mar 2007
Location: Long Island, NY
Posts: 9,519
Default

Garrage attic subfloor


The 2x4 ceiling joists are inadequate for storage, unless you're a fan dancer.
__________________
Ron
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety."
B. Franklin 1759
Ron6519 is offline   Reply With Quote
The Following User Says Thank You to Ron6519 For This Useful Post:
Marke016024 (12-03-2011)
Old 12-03-2011, 06:57 PM   #4
Newbie
 
Join Date: Dec 2011
Posts: 3
Question

Garrage attic subfloor


Quote:
Originally Posted by joecaption View Post
That means it's nonstorage trusses. There never intended to have any form of storage on top of then. It you do they may crack.
If you insisting on using it for storage then sister 2 X 8 to the 2 X 4's from on top of the outside walls and screws and constrution adhesive them together and use Advantex subflooring.
Ok, so if I sister these studs up the way you configured them I will need 2x8's that run the entire 20' lengths? there is no joining trusses right?

Thanks for your help! Its either this or a big ugly shed in the back yard.
Marke016024 is offline   Reply With Quote
Old 12-03-2011, 07:05 PM   #5
Disabled wood vet
 
titanoman's Avatar
 
Join Date: Nov 2011
Location: California
Posts: 1,646
Default

Garrage attic subfloor


2x8 spanning 20' will still be spongy, even scabbed to the trusses. You need to check local codes as this will be considered a live load. You may need to go to 2x10.
titanoman is offline   Reply With Quote
Old 12-03-2011, 07:19 PM   #6
Residential Designer
 
AndyGump's Avatar
 
Join Date: Sep 2010
Location: Orange County CA.
Posts: 1,263
Send a message via Skype™ to AndyGump
Default

Garrage attic subfloor


If your jurisdiction will allow for 10 lb. dead load and 30 lb. live load for the garage storage then you could do Dug Fir #1 or Southhern Pine #1
2x10s 12" OC

or SP #2 and DF #2 2 x 12s @ 16" OC

Andy.
AndyGump is offline   Reply With Quote
Old 12-03-2011, 08:37 PM   #7
journeyman carpenter
 
woodworkbykirk's Avatar
 
Join Date: Sep 2011
Location: nova scotia canada
Posts: 2,655
Default

Garrage attic subfloor


where are you going to find 20' 2x10. and secondly how are you going to even be able to get them up in the attic. to install them..
woodworkbykirk is offline   Reply With Quote
Old 12-03-2011, 08:45 PM   #8
Mod
 
kwikfishron's Avatar
 
Join Date: Mar 2010
Location: Kansas (NCK)
Posts: 7,204
Default

Garrage attic subfloor


Quote:
Originally Posted by woodworkbykirk View Post
where are you going to find 20' 2x10.
At just about any lumber yard (not box store) in the USA.

Quote:
how are you going to even be able to get them up in the attic. to install them..
Now there's the 64k question.
__________________
A Picture Is Worth A Thousand Words
Especially In The DIY Chatroom
kwikfishron is offline   Reply With Quote
Old 12-03-2011, 09:46 PM   #9
Residential Designer
 
AndyGump's Avatar
 
Join Date: Sep 2010
Location: Orange County CA.
Posts: 1,263
Send a message via Skype™ to AndyGump
Default

Garrage attic subfloor


Who are you guys trying to B-S?

You both know the answer to that one.

Andy.
AndyGump is offline   Reply With Quote
Old 12-04-2011, 07:21 PM   #10
Newbie
 
Join Date: Dec 2011
Posts: 3
Question

Garrage attic subfloor


Ok Im back with more information, the 2x4's are part of an enginered truss support system. does this make a difference? I imagine this is stronger than just the joists alone.
Marke016024 is offline   Reply With Quote
Old 12-05-2011, 12:00 PM   #11
Crusty Old Dude
 
Big Stud's Avatar
 
Join Date: Jul 2011
Location: Detroit
Posts: 111
Default

Garrage attic subfloor


I have trusses as you describe in my garage. Engineered out of 2x4's, with just over a 4' space at the bottom of the triangle that goes down the center of the garage, I took 3/4" osb TG sub flooring and cut it lengthwise down the center. I had to do that to get the sheets up into the space to nail it down. I cut the first one to length to make it break at a rafter on the center and ran it the entire length of the garage. I have stored lightweight stuff in there for years like xmas decorations and such without any problems. I am a fair sized guy and have climbed up there regularly and it feels plenty solid to me. I say it can be done without fear as long as you don't plan on storing boat anchors up there

__________________
All the best to you and yours, Tom
Big Stud 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
How should I reinforce this subfloor? NewHomeDIYGuy Tiling, ceramics, marble 35 12-05-2011 10:01 AM
Ventilating attic with two roofs senorbungle Building & Construction 2 01-09-2011 04:17 PM
Insulation, Ventilation in Cape Cod Side Attic Get'n er done Building & Construction 10 12-02-2010 11:38 PM
Frost in the Attic 295yards General DIY Discussions 13 12-07-2009 04:27 PM
Attic Smell from A/C - I'm at wit's end! cidsamuth HVAC 17 09-06-2008 12:59 PM




Top of Page | View New Posts

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