Flat Roof Reframing - How Long?

 
Thread Tools Search this Thread Display Modes
Old 05-17-2011, 10:24 AM   #1
Pro
 
Grumpy's Avatar
 
Trade: Roofing and Gutter Specialist
Join Date: Oct 2003
Location: Chicago
Posts: 8,573
Rewards Points: 2,000
Send a message via AIM to Grumpy

Flat Roof Reframing - How Long?


I've got a contract to replace a flat roof on a 2 story residence. However we may or may not be restructuring the framing for a possible roof deck.

I got a drawing from the engineer with his proposed changes for restructuring. I feel we are more than capable, but my foreman is telling me that I am being overly optimistic in my estimate of how long it will take. Since this is not something that we do every day, don't have much baseline for gauging time. I'm making educated guesses.

I've already made a material list, just have to add on my labor. I'm strictly wondering how long you think it would take to restructure and resheat. Any ideas?

Short summarized scope of work:
Sister aprox 30 rafters 22' each with 14" microlams.
Install ledger at each 2 walls 45' each. You will see the engineer specified steel with a wood nailer, but we changed that steel to 2 2x10's and no nailer.
Tie-in rafters to ceiling joists at front of building.
resheat with 3/4" cdx.

Roof is aprox 22'x45'.

This link is for the engineer report. I tried to upload it but it exceeds the file size allotment. http://reliableamerican.us/temp/1111...nleaf%20S1.pdf

Last edited by Grumpy; 05-17-2011 at 11:57 AM.
Grumpy is offline  

Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. ContractorTalk.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!

   
 

Old 05-17-2011, 02:45 PM   #2
SEMI RETIRED
 
griz's Avatar
 
Trade: General Contractor
Join Date: Nov 2009
Location: CA
Posts: 13,601
Rewards Points: 4,356

Re: Flat Roof Reframing - How Long?


Hey Grumpy, if this is not what you do on a regular basis & your foreman is skeptical of the labor time...

Perhaps you should sit down with him & go over your labor quote & get a feel for what he is skeptical about. Maybe between the two of you he'll understand the job better & you'll see what's bugging him & maybe see if you goofed.

Good Luck

griz is offline  
Old 05-17-2011, 03:20 PM   #3
Pro
 
Grumpy's Avatar
 
Trade: Roofing and Gutter Specialist
Join Date: Oct 2003
Location: Chicago
Posts: 8,573
Rewards Points: 2,000
Send a message via AIM to Grumpy

Re: Flat Roof Reframing - How Long?


He and I have, we came up with much different guesses. In my mind I can't see it taking as long as he thinks it will take. I am figuring abotu half as long as he is figuring. I'm more than happy to share the number, but I don't want to poision the responses.

He and I have talked it through down to the exact number of holes that will need to be drilled. He seems to think it will take twice as long as I, which is signifigant. What I don't want to happen is submit a bid being overly optimistic and have a negative profit for it.

He and I agree what needs to be done, we just can't agree on how long it'll take. truth be told, we've been in this situation many times before with other type work. Sometimes he's right, sometimes I am right. I figure it's time to get a 3rd opinion.
Grumpy is offline  
Old 05-17-2011, 03:32 PM   #4
Pro
 
Framer53's Avatar
 
Trade: Handyman
Join Date: Jan 2009
Location: Utica,NY
Posts: 2,341
Rewards Points: 1,252

Re: Flat Roof Reframing - How Long?


Site conditions come into play. Room to work? How high in the air? etc.

I could give you an estimate based on my experience, but remember we are framers and do it every day, or did it every day.

My thoughts are with an experienced 5 maN CREW, YOU will have approx 45 hours into this. +-
Framer53 is online now  
Old 05-17-2011, 03:36 PM   #5
Geometrist
 
Warren's Avatar
 
Trade: framing/remodeling
Join Date: Feb 2005
Location: NE Ohio
Posts: 6,980
Rewards Points: 2,547

Re: Flat Roof Reframing - How Long?


Quote:
Originally Posted by Framer53 View Post
Site conditions come into play. Room to work? How high in the air? etc.

I could give you an estimate based on my experience, but remember we are framers and do it every day, or did it every day.

My thoughts are with an experienced 5 maN CREW, YOU will have approx 45 hours into this. +-
I think this is every close. I may have been a bit lower, but it all depends.
Warren is online now  
Old 05-17-2011, 03:53 PM   #6
Pro
 
darr1's Avatar
 
Trade: all carpentry
Join Date: May 2010
Location: ireland
Posts: 583
Rewards Points: 500

Re: Flat Roof Reframing - How Long?


you should get an experienced framer in on the job with you
darr1 is offline  
Old 05-17-2011, 04:09 PM   #7
Pro
 
Grumpy's Avatar
 
Trade: Roofing and Gutter Specialist
Join Date: Oct 2003
Location: Chicago
Posts: 8,573
Rewards Points: 2,000
Send a message via AIM to Grumpy

Re: Flat Roof Reframing - How Long?


About 20' up. Nothing out of the ordinary. I figure predrill all the through holes on the ground to the engineer's pattern before lifting the microlams and cutting them to size. There should be plenty of room to work IMO if we are stripping all the existing roof boards, put some plywood over the ceiling joists for a place to sit/kneel. If need be I could get a crane on the job, but I think that'd be overkill and a crane day costs almost as much as a crew day.

Framer 53, so I understand your 45 hours for 5 men is bascially a 9 hour day. Correct?

I figured 5 man crew 2 man days, so about 16-20 crew hours or 80-100 total man hours not counting the actual roofing work after which is a breeze.

My foreman figured about 3-4 crew days which I think is just scared talk.
Grumpy is offline  
Old 05-17-2011, 04:21 PM   #8
Geometrist
 
Warren's Avatar
 
Trade: framing/remodeling
Join Date: Feb 2005
Location: NE Ohio
Posts: 6,980
Rewards Points: 2,547

Re: Flat Roof Reframing - How Long?


My thoughts were that Framer had figured 5 guys for 45 hours each which means 225 man hours. When I said I may be a little less, I was thinking 4 guys 40 hours, or about 160 hours. I think your foreman is closer Grumpy.
Warren is online now  
The Following User Says Thank You to Warren For This Useful Post:
Framer53 (05-17-2011)
Old 05-17-2011, 06:53 PM   #9
Pro
 
Grumpy's Avatar
 
Trade: Roofing and Gutter Specialist
Join Date: Oct 2003
Location: Chicago
Posts: 8,573
Rewards Points: 2,000
Send a message via AIM to Grumpy

Re: Flat Roof Reframing - How Long?


Hmmmmm
Grumpy is offline  
Old 05-17-2011, 08:20 PM   #10
Dan
 
ApgarNJ's Avatar
 
Trade: Remodeling Contractor
Join Date: Apr 2006
Location: Stockton, NJ
Posts: 4,822
Rewards Points: 2,000
Send a message via AIM to ApgarNJ

Re: Flat Roof Reframing - How Long?


Grumpy, You aren't going to get that done in a 9 hour day. especially 20' up in the air. just moving material is going to take a while.
ApgarNJ is offline  
Old 05-18-2011, 08:22 AM   #11
Pro
 
Grumpy's Avatar
 
Trade: Roofing and Gutter Specialist
Join Date: Oct 2003
Location: Chicago
Posts: 8,573
Rewards Points: 2,000
Send a message via AIM to Grumpy

Re: Flat Roof Reframing - How Long?


Quote:
Originally Posted by ApgarNJ View Post
Grumpy, You aren't going to get that done in a 9 hour day. especially 20' up in the air. just moving material is going to take a while.
I didn't say one 9, I said two 10's. I thought Framer was saying one 9.

Having a roof open to the elements for 4 days is a huge lability. Time to walk away. Not my cup of tea.

Thanks for the help all.

Last edited by Grumpy; 05-22-2011 at 08:46 AM.
Grumpy is offline  
Old 05-18-2011, 09:54 AM   #12
Solvent breather
 
Metro M & L's Avatar
 
Trade: Painting and Flooring
Join Date: Jun 2009
Location: Portland, OR
Posts: 2,704
Rewards Points: 1,704

Re: Flat Roof Reframing - How Long?


Buy your foreman a whip. And show him how to use it.
__________________
"When someone tells you that they exhibit crazy behavior, believe them." - Ted Anderson

www.portlandhardwoodrefinishing.com
Metro M & L is online now  
Old 05-18-2011, 12:02 PM   #13
master hacker of wood
 
FRAME2FINISH's Avatar
 
Trade: restoration carpentry
Join Date: Aug 2010
Location: cny
Posts: 2,423
Rewards Points: 1,598

Re: Flat Roof Reframing - How Long?


up in the air always takes time imo, safety should be number 1
FRAME2FINISH is offline  
Old 05-18-2011, 01:12 PM   #14
Pro
 
Grumpy's Avatar
 
Trade: Roofing and Gutter Specialist
Join Date: Oct 2003
Location: Chicago
Posts: 8,573
Rewards Points: 2,000
Send a message via AIM to Grumpy

Re: Flat Roof Reframing - How Long?


Being a roofer, being up in the air in 2nd nature to us.

Grumpy is offline  


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
Mid Century Modern Flat Roof mikedemeo General Discussion 0 02-05-2011 10:38 PM
Roof Cleaning Pictures Wanted !! Roof Cleaning Pressure Washing 5 09-07-2010 08:24 AM
Joining a flat roof to sloped shingled roof emandel Roofing 4 09-21-2009 12:05 PM
Metal roof question Burby Roofing 11 01-22-2009 12:16 PM

Join Now... It's Fast and FREE!

I am a professional contractor
I am a DIY Homeowner
Drywall Talk is for
PROFESSIONAL CONTRACTORS ONLY!

At DrywallTalk.com we cater exlusivly to professional contractors who make their living as a contractor. Knowing that many homeowners and DIYers are looking for a community to call home, we've created www.DIYChatroom.com DIY Chatroom is full of helpful advices and perfect for DIY homeowners.

Redirecing in 10 seconds
No Thanks
terms of service

Already Have an Account?