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Old 02-07-2018, 09:11 PM   #1
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Changing roofline for addition, need suggestions please


We have a 24' square attached garage that we are wanting to convert into a living space. We would like to extend the room out as seen in the pictures onto where the concrete apron for garage is. Probably 10' or so.

I haven't talked to any contractor about this and I am sure ignorant to this. But just wondering with the angles to the hip roof if it would be worth doing or even possible without lots of pains changing roofline.

Thanks for comments and suggestions!
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Changing roofline for addition, need suggestions please-house-roof-2.jpg   Changing roofline for addition, need suggestions please-house-roof.jpg  
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Old 02-07-2018, 09:32 PM   #2
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Re: Changing roofline for addition, need suggestions please


Hard to say until you know the structure of the roof is but usually things can be worked out and the bigger question will be footing and foundation for the addition.
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Old 02-07-2018, 09:54 PM   #3
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Re: Changing roofline for addition, need suggestions please


Thanks for the reply, figure we will tear up the apron and thoughts are to add to the concrete slab that is in the attached garage? We are going to build up floor 6-8" on the concrete slab.
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Old 02-07-2018, 09:58 PM   #4
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Re: Changing roofline for addition, need suggestions please


Quote:
Originally Posted by bluefan89 View Post
Thanks for the reply, figure we will tear up the apron and thoughts are to add to the concrete slab that is in the attached garage? We are going to build up floor 6-8" on the concrete slab.
Would you be looking at taking walls out, front of garage side of house?
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Old 02-17-2018, 08:33 AM   #5
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Re: Changing roofline for addition, need suggestions please


Sorry for the delay in responding, was having trouble logging in.

I think we are going to take that entry door area out and the piece of brick wall beside large garage door. Depending if they are not load bearing or need to be there then come out 10' or so and put french doors in.

Just not sure with those Angles what kind of trouble they would pose extending the room out.

Thanks and appreciate any comments on this.
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Old 02-17-2018, 08:43 AM   #6
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Re: Changing roofline for addition, need suggestions please


Do you have room to extend to the side instead? Are you going to have an architect draw plans? I wouldn't do it any other way. The building dept. might insist on it. Whatever you do, watch the drainage.
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Old 02-17-2018, 08:48 AM   #7
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Re: Changing roofline for addition, need suggestions please


We would like to come out from the garage door side, get into the driveway the other way.

We will most likely have architect draw plans, and will definitely be fixing drainage, with some french drain type setup.

Just curious as to those that know before we get into this if those roof lines will be a problem?
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Old 02-17-2018, 09:19 AM   #8
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Re: Changing roofline for addition, need suggestions please


Quote:
Just curious as to those that know before we get into this if those roof lines will be a problem?
That's why I mentioned the drainage & an architect. It's his job to make sure that there is no problem.
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Old 02-17-2018, 09:24 AM   #9
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Re: Changing roofline for addition, need suggestions please


Got ya appreciate that.

Guess they will know if those roof angles are "doable" for extending out.

I guess we could be happy with the 24' x 24' extra space of the garage, but while we are into it thought we should investigate moving out some.
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Old 02-17-2018, 09:28 AM   #10
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Re: Changing roofline for addition, need suggestions please


Right, ask all the questions now. You want it to be a one shot deal.
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Old 02-17-2018, 01:06 PM   #11
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Re: Changing roofline for addition, need suggestions please


It is doable. But it's more than just a pad. It will require footings and an insulated foundation. And your existing garage foundation and pad are probably not currently insulated. As for the roof, in the end, your roof would be turned into a basic hip shape.

The plane of the house roof on the left side of the pic would continue over the addition... and would meet the plane of the garage roof on the right side of the pic at a hip. The lower ridge (back side of roof) would need to be extended to the same height as the rest of the back side of the house roof. That would all have to be done as a build over, on top of your existing trusses. (I'm assuming it's trusses) and would require an architect/engineer to draw up and approve the plans.

The existing front wall of the garage is load bearing, and could only be removed if it was replaced by a steel beam, and that steel beam would likely need to be under the trusses. To get the beam up in the trusses to give you headroom would mean the trusses would need to be reworked, which would also require an architect/engineered plan since you are never supposed to cut or modify a truss without it.

And then obviously, you just would still need a new garage.

IMO, if there is another location where you could simply build a new addition, it would likely make more sense.
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Old 02-17-2018, 01:16 PM   #12
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Re: Changing roofline for addition, need suggestions please


Thanks for the reply, the attic above the garage is stick built no trusses. I will try to take a picture of the area above the garage.

very helpful thanks!
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Old 02-28-2018, 02:42 PM   #13
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Re: Changing roofline for addition, need suggestions please


Depends on the depth of the building and if the current garage and house line up.

Either way it looks like you'll need to remove the roof from where the main house ridge line splits into the garage roof section. Then you'll build the new section wall (replacing the current garage door wall) including any foundation work, and re truss that whole section.
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