Garage addition - Extending Roofline

[Bolson32]

Hi All,

I'm starting the process of building a garage addition and I wanted to see if anyone has any experience extending a roofline. My garage shares a roofline with the family room behind it, but sticks out 6ft past the family room/chimney. The goal is to add a 3rd stall addition that also encompasses the area behind the existing garage while maintaining the wall for the existing garage.

I'm curious if anyone has done anything like this and can share some experiences matching rooflines/trusses. I know the shingles won't match perfectly but I'm not too concerned about that. We'll look to re-roof the whole house in the next 5 years anyway and will hopefully go metal at that time. I don't want to hear why it can't be done as I'm pretty well set on this path with matching the roofline. I want a taller ceiling and I don't want a stepped down roofline with a shorter ceiling.

I'm also acting as my own general so if anyone has any tips on that I'd appreciate it! I've got excavation and concrete lined up, gotten a few bids on framing and roofing. I'm planning on siding it myself and hanging all the doors etc. I may even shingle it myself, tbd.

Full Gallery: https://imgur.com/gallery/o7l8a2f

Rendering

Front Elevation:

Blueprints:

Drone Photo of Existing:

 

[tff]

I only have experience with a detached garage addition.
But I will say I like your design and how you're integrating the new and the old.
What do you plan to use the new garage space for?

 

[CombatNinja]

What do you need the height for? I assume your current garage has standard attic trusses by the looks of that roofline. Why not step the roof of the addition but use a beam and rafter construction or scissor trusses to give you even more height than the existing garage space?

The house will look dramatically better if you step that roofline and set the addition even 24" or so from the front of the existing garage. The house looks nice now and is set in a pretty location. This addition as you proposed is going to make it look like a warehouse with a small living space grafted on. You are going to wreck it aesthetically, especially with mismatched shingles on there for years. You could probably even find a way to do the addition with the metal roof from the outset and have it look good, saving you a little bit in the long run.

edit: just relooked at the plans, I see that the proposed addition is indeed set back. That will help a lot. Still, depending on what you want that height for, I would be looking to used scissor trusses so I could step the roofline and gain interior height in the addition.

 

[Bolson32]

What do you need the height for? I assume your current garage has standard attic trusses by the looks of that roofline. Why not step the roof of the addition but use a beam and rafter construction or scissor trusses to give you even more height than the existing garage space?

The house will look dramatically better if you step that roofline and set the addition even 24" or so from the front of the existing garage. The house looks nice now and is set in a pretty location. This addition as you proposed is going to make it look like a warehouse with a small living space grafted on. You are going to wreck it aesthetically, especially with mismatched shingles on there for years. You could probably even find a way to do the addition with the metal roof from the outset and have it look good, saving you a little bit in the long run.

edit: just relooked at the plans, I see that the proposed addition is indeed set back. That will help a lot. Still, depending on what you want that height for, I would be looking to used scissor trusses so I could step the roofline and gain interior height in the addition.

Yes, the front will sit back 3ft. Also, the plans call for scissor trusses so the inside will indeed be quite tall.

I'm going to put a golf sim in the back part, and I spend a lot of time in my garage and mostly like the feel of a nice open area. With that said my current garage has 9ft walls, and you need a minimum of 10ft high ceilings for a sim, better yet 11. So Stepping back a foot and dropping the roof didn't get me there. Merging the roofline and using scissor trusses accomplished that in spades.

I was concerned about the house on the garage look as well but my architect doesn't seem to think that's a concern with the 3ft setback and transom windows.

 

[Bolson32]

I only have experience with a detached garage addition.
But I will say I like your design and how you're integrating the new and the old.
What do you plan to use the new garage space for?

Thank you! I think I actually like this look the best tbh. If you step the roof down it DEFINITELY looks like an addition.

I'm going to put in a golf simulator which is the reason for the height. I also do a fair bit of woodworking, just general DIY stuff. I drive a full-sized pickup and that doesn't fit in the current garage, too long. So a slightly taller door and wider door fit the bill for that. I live in Minnesota and I'm sick of parking outside.

 

[pmiranda]

Is the notch in the back corner purely for esthetics? If so, I wouldn't bother IMO. That angle is not going to be seen much and the extra framing and forming work adds cost, plus makes for a weird interior. Are you putting a gutter on the addition? The notch will complicate that as well. Maybe it's to spare that big tree?

Pay attention to flashing the chimney if you keep it. If you want to get rid of it inside (as the floorplan shows) but still have a chimney coming out of the roof (as the renderings show), it's going to take some serious framing and support work. It's inconvenient to work around, but it will save alot of effort to leave it be. The space cost is about as much as in that notch in the floorplan FWIW.

How much is the slope to the side? Might be an artifact of a wide-angle lens, but it looks like you're in for a few feet of exposed foundation and fill. Not the end of the world and you can plant some bushes to hide it, but it's not in the renderings so it might be a small surprise.

Overall I think it's a great project and you'll love the new space.

 

[The Cobbler]

for your Imgur pics to show on here , you need to remove the "S" from the "HTTPS" in your links

 

[Bolson32]

for your Imgur pics to show on here , you need to remove the "S" from the "HTTPS" in your links

They're all showing for me, I only linked 3. The imgur link is just a link to the full gallery if other people want to see a few others I have in there.

 

[Bolson32]

Is the notch in the back corner purely for esthetics? If so, I wouldn't bother IMO. That angle is not going to be seen much and the extra framing and forming work adds cost, plus makes for a weird interior. Are you putting a gutter on the addition? The notch will complicate that as well. Maybe it's to spare that big tree?

Pay attention to flashing the chimney if you keep it. If you want to get rid of it inside (as the floorplan shows) but still have a chimney coming out of the roof (as the renderings show), it's going to take some serious framing and support work. It's inconvenient to work around, but it will save alot of effort to leave it be. The space cost is about as much as in that notch in the floorplan FWIW.

How much is the slope to the side? Might be an artifact of a wide-angle lens, but it looks like you're in for a few feet of exposed foundation and fill. Not the end of the world and you can plant some bushes to hide it, but it's not in the renderings so it might be a small surprise.

Overall I think it's a great project and you'll love the new space.

Great questions and glad you asked. The notch in the back serves two purposes, to restrict SQ footage, as I'm limited by how large my addition can be, and we're squeezing every ft we can out of it. And aesthetics, it does give a 3ft stagger on each side when looking at the left elevation, it evens it out. I know it's going to be more expensive, but...I like it and I actually need it to limit the sq footage anyway.

2: The chimney is staying, that's actually 2 versions from the blueprint, it's going to stay in the new garage, which is fine with me. I don't have the money for the teardown right now and It does a good job of breaking up the massive roofline.

3: There's probably about an 18-24" drop there so I may have to haul in some fill/black dirt. We'll see what's left after I expand the driveway and pour a skirt outback. I bet I can lose a fair bit of what I pull away there. But yea there will be some landscaping to do for sure. The notch also does help in keeping a little distance from that big spruce, which I love and isn't going anywhere. Gutters are heavily frowned upon in the front from my architect...but he doesn't have to shovel. So maybe after he's out of the picture I add them

Also I'm glad to hear some positive reviews, thanks!

 

[pmiranda]

to restrict SQ footage, as I'm limited by how large my addition can be, and we're squeezing every ft we can out of it.

You could try to convince the powers-that-be that the chimney footprint shouldn't count

 

[Bolson32]

Hahaha, I thought about that. It is like 12sq ft. Being it's going to be a bit of man-cave though anyway...I don't hate it. I can hang some mounts on it and it'll actually be some decent thermal mass to help keep it at a warm temp come winter. plus if it's out of the elements it should last forever.

 

[cosmopedro]

They're all showing for me, I only linked 3. The imgur link is just a link to the full gallery if other people want to see a few others I have in there.

Not really helpful to you - and I apologize for that - but what architectural software are you using?


Sent from my iPhone using The Garage Journal mobile app

 

[cosmopedro]

They're all showing for me, I only linked 3. The imgur link is just a link to the full gallery if other people want to see a few others I have in there.

Not really helpful to you - and I apologize for that - but what architectural software are you using?

 

[Bolson32]

Not really helpful to you - and I apologize for that - but what architectural software are you using?

Unfortunately I don't know, I hired an architect for he design but it appears to be fairly common as I've seen numerous plans with a similar layout. Sorry I can't be any more help.

Sent from my SM-G965U using Tapatalk

 

[Bolson32]

Anyone have any experience merging shingles? I've shingled a couple of shed roofs from scratch but never tried to merge two. I assume you essentially pull off enough to get back to shingling properly again??

 

[ddawg16]

I like the look.

About the only suggestion I would have....build a gable over the addition garage roof. It will complement the look of the house.

 

[Bolson32]

I like the look.

About the only suggestion I would have....build a gable over the addition garage roof. It will complement the look of the house.

That was on one of the first drafts but neither the architect or I really liked the look of that so it got nixed. You see it on a lot of 3 stall garages but it's over the larger door or the main section. It just didn't look great on the 3rd stall off by itself.

 

[Bert_]

It's a lot of garage, the roofline dwarfs that of the house.

Also, what is up with the random band board on the gable side. Looks very out of place since it isn't continued on any other part of the building.

 

[Bolson32]

It's a lot of garage, the roofline dwarfs that of the house.

Also, what is up with the random band board on the gable side. Looks very out of place since it isn't continued on any other part of the building.

There's a bumpout to to breakup the massive size of the gable end, adds texture and makes it not just a massive wall.