Flat Roof construction

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Forum topic by Masterclips posted 02-22-2010 03:45 PM 1089 views 0 times favorited 5 replies Add to Favorites Watch
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3 posts in 3249 days

02-22-2010 03:45 PM

Hi everyone, i am from London and new on this blog website.

Just looking for some tips on how to build a flat roof in a new studio i have started to rent. Its for woodworking and i was hoping to use the roof to store wood and the odd few peices of material. I also wouldn’t mind being able to do some drawing up there too, so it would need to take my weight.

I was looking into it and my situation is this:

i have 1 solid brick wall i can screw the joists into and the others are wooden. Ofcourse hanging joists on wood isn’t ideal and especially for taking weight.

I was thinking of having a basic stud wall made which would sit flat. And having the 3X2 on thier side for maximum strength.

Basically looking for any tips you can provide to add strength and make it safe, or if its not possible!!

Thanks again everyone and i hope to give any tips i can to anyone else, so please ask.

Oliver….....( Masterclips )

5 replies so far

View Greg Elam's profile

Greg Elam

29 posts in 3274 days

#1 posted 02-23-2010 05:55 AM

Oliver, I am a little confused about your refering to a roof. Is the studio currently wide open say 18’ to 20’ high ceiling with a current existing roof? If this is the case your basically trying to add another floor say 9’ to 10’ high is that correct. What will be your means of accessing this second level? stairs? ladder? Also what will be the span between the walls you intend to anchor your joist too. 2×4’s dont carry very much weight over say 5’.

If what I have mentioned in regards to a second floor is correct I would not trust 2×4’s to support your weight along with whatever else you plan to store up there. You might want to do some research on floor framing prior to any purchases or installation.

Hope this helps

-- Greg Elam - Berea, Kentucky

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3 posts in 3249 days

#2 posted 02-23-2010 10:53 PM

Thanks Greg, I will be using a stair case. Which i too will be building. And you have deduced correctly what i want to do.

I am doing this as a joint project i have some reservations about the roof we are building. So i wanted to see if you guys had some recommendations on the build. I will check out floor framing research and see what it comes up with.

I saw you can buy metal joist hangers, these i am contemplating using but using them into wood is making me nervous for the build. So i will go check it out and see how it goes.

Thanks for the fast reply Greg, your words are greatly apprieciated.


View Dennis Fletcher's profile

Dennis Fletcher

467 posts in 3288 days

#3 posted 02-23-2010 11:17 PM

Oliver, It all depends on the span the boards would have to take. I would definitely start with the idea of 2×8’s or larger, depending on the span.

There isn’t anything wrong with nailing these joists into a wood wall, just put in a header first and run some support posts down to the ground. Generally, this will help to lesson the load at one point, allowing the entire wall to take the load, but, it also depends upon the span and the direction of the floor joists.

If you could sketch it up and send it to me, I may be able to give you better advise. I design buildings as my main business, so I should be able to help a little.

--, Making design and application one. †

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3 posts in 3249 days

#4 posted 02-23-2010 11:22 PM

Hi Dennis, thats great news, i’ll try and get some sketches done asap, doing this in my spare time so i’ll try to get them done quickly.

I think the span, unfortunatley, is around 12ft. So its quite large. I was thinking as you say to run some support posts down.

I’ll get a sketch done and send it over.

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Dennis Fletcher

467 posts in 3288 days

#5 posted 02-23-2010 11:26 PM

No problem.

--, Making design and application one. †

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