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 11-25-2011, 03:36 PM   #1
Newbie
 
Join Date: Nov 2011
Posts: 1
Share |
Default

Attic Conversion Questions...


Hi Everyone,

I am working on converting my attic into living space and I have a few questions.

1. The roof was built with 2x4's 24" oc. I am thinking of sistering 2x6's to these to add some additional support. Anything more than 2x6 would compromise head room.

Would the 2x6's even be needed? Or, would they actually give enough support that would make it worth sistering them? What do you think?


2. Also, the joists that make up the attic floor are 2x6. Will this be sufficient to hold the additional weight that will be upstairs?

SQuinn88 is offline   Reply With Quote
Old 11-25-2011, 03:41 PM   #2
Framing Contractor
 
Join Date: Apr 2006
Location: Caldwell, NJ
Posts: 1,758
Default

Attic Conversion Questions...


Quote:
Originally Posted by SQuinn88
Hi Everyone,

I am working on converting my attic into living space and I have a few questions.

1. The roof was built with 2x4's 24" oc. I am thinking of sistering 2x6's to these to add some additional support. Anything more than 2x6 would compromise head room.

Would the 2x6's even be needed? Or, would they actually give enough support that would make it worth sistering them? What do you think?

2. Also, the joists that make up the attic floor are 2x6. Will this be sufficient to hold the additional weight that will be upstairs?
You need an architect or engineer to tell you. You will need permits and inspections to do this. Are you planing on doing this?

__________________
Joe Carola
Joe Carola is offline   Reply With Quote
Old 11-25-2011, 05:19 PM   #3
Member
 
Join Date: Feb 2010
Location: MI's Western UP
Posts: 599
Default

Attic Conversion Questions...


for the floor, it depends on the spans involved.

for the roof, you probably don't need a whole lot more strength, just enough to hold up the drywall and insulation. If it is bowed already, it probably needs some help. if not, it is probably fine. what do you plan on for insulation?

If you think you do need more strength, I'd probably put additional 2x4s horizontally under the current 2x4s, like an upside down T, as apposed to sistering in 2x6s. another option would be to sheet it with plywood. that will add strength to the roof without cutting into your probably minimal height that is there.
forresth is offline   Reply With Quote
Old 11-25-2011, 11:06 PM   #4
Member
 
Join Date: Mar 2007
Location: Long Island, NY
Posts: 9,519
Default

Attic Conversion Questions...


As Joe said, you will need professional guidance on this. Floor structure aside, there's a headroom issue, windows and egress.
Sometimes an attic is just that.
Post some photos of the area you want to convert.
__________________
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
Old 11-26-2011, 12:30 AM   #5
JOATMON
 
ddawg16's Avatar
 
Join Date: Aug 2011
Location: S. California
Posts: 7,069
Default

Attic Conversion Questions...


Quote:
Originally Posted by SQuinn88 View Post
2. Also, the joists that make up the attic floor are 2x6. Will this be sufficient to hold the additional weight that will be upstairs?
The other guys answered the questions.....

But let me stress.....even without engineering input....I can tell you that those 2x6's are not nearly enough support for any type of live or dead load. You can do a search for span tables....those 2x6's are only for a ceiling....and maybe one person working in the attic.

To give you an idea, my garage has an attic that is rated as a 'usable space'. The garage is 20x25....in the center I have a 7x16 PSL beam...on top of that I have 2x8 floor joists on 12" OC.

Your 2x6 ceiling joists on 16" OC are not even close enough.

Get an Engineer....otherwise, your attic living space is going to end up on the lower level.
__________________
"The dream is free but the hustle is sold separately."

My 2-Story Addition Build in Progress Link ... My Garage Build Link and My Jeep Build Link
ddawg16 is offline   Reply With Quote
Old 11-26-2011, 01:22 AM   #6
Residential Designer
 
AndyGump's Avatar
 
Join Date: Sep 2010
Location: Orange County CA.
Posts: 1,278
Send a message via Skype™ to AndyGump
Default

Attic Conversion Questions...


Oh, you really do need to talk with a professional designer on this, then when you have a plan that will pass to the permit phase and you have the go-ahead from the Building Depart, start swinging that hammer.

Andy.
AndyGump is offline   Reply With Quote
Old 11-26-2011, 10:27 AM   #7
Member
 
Join Date: Feb 2010
Location: MI's Western UP
Posts: 599
Default

Attic Conversion Questions...


you don't need to hire a professional to look at span tables
forresth is offline   Reply With Quote
Old 11-28-2011, 03:46 PM   #8
Newbie
 
Join Date: Nov 2011
Posts: 6
Default

Attic Conversion Questions...


Quote:
Originally Posted by forresth View Post
you don't need to hire a professional to look at span tables
Here's a freebie!

http://www.awc.org/calculators/span/...rcalcstyle.asp

granadaCoder 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
Newbie questions on refinishing walkup attic with knee walls FileOpen Insulation 2 11-19-2011 11:31 PM
Forced hot air conversion questions. Tmb9862 HVAC 2 01-26-2011 07:57 PM
Frost in the Attic 295yards General DIY Discussions 13 12-07-2009 04:27 PM
Finished attic humidity? kcrossley2 HVAC 2 08-11-2009 05:06 AM
Attic Ventilation Questions AllGoNoShow Roofing/Siding 4 11-26-2006 12:02 PM




Top of Page | View New Posts

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