OSB directly on installation layer ?

[Svensson91]

Hello!

I am building a garage and am about to start insulating and finishing the interior. I have a 170-frame that I will insulate and then add a vapor barrier, after which I plan to install an "installation layer" with horizontal 45x45 studs at CC60 to easily insulate that layer.

My question is: Can I attach the OSB boards directly to the installation layer even though the studs are horizontal with CC60, or will it be too far between the chipboard screws vertically?

Thanks in advance.

 

[Johan456]

No, it works perfectly, and that's how it's usually done. Are you going to put plaster on the outside or just OSB? If so, you also need to place OSB pieces behind all the joints that don't end up on a stud.

 

[Svensson91]

No, that works perfectly and that's how it's usually done. Are you going to put plasterboard on top or just OSB? If so, you should also place OSB pieces behind all the joints that don’t land on a stud.

Thanks for the quick response! I'm just going to have OSB, no need for plasterboard for the building permit, so I think OSB will suffice.

 

[Svensson91]

No, it works perfectly and that's how it's usually done. Are you planning to put plasterboard on top or just OSB? If so, you should also place OSB pieces behind all joints that don't align with a stud.

Do you mean I should put something behind if I'm only going to have OSB?

 

[Johan456]

Do you mean I can put something behind if I'm just going to have OSB?

So if you have horizontal 45x45 CC 600mm, you make sure that the horizontal boards end in the middle of the stud, which is then CC 1200 from the floor. The next board upwards is attached to the same stud as well as the stud towards the ceiling. You need to insert small OSB boards in the short ends.

see attached image, here I do as you have planned, but I use plywood, which I think looks nicer. Before I attached the board on the right, I cut strips about 100x550mm that I put halfway under the board and screwed in place. When I then attached the next board, I could also screw it into the short end so that the boards were "joined together."

 

[Svensson91]

So, if you have horizontal 45x45 CC 600mm, make sure the horizontal boards end in the middle of the stud, which is then CC 1200 from the floor. The next board upwards should be screwed to the same stud as well as to the stud near the ceiling. You need to add small OSB boards at the short ends.[image]

see the attached image, here I'm doing as you intended but I'm using plywood which I think looks nicer. Before I placed the board on the right, I cut strips like 100x550mm that I inserted halfway under the board and screwed in place. When I then placed the next board, I could also screw it at the short end so that the boards were "joined."

okay thanks for the explanation! I understand, great tips! But why have horizontal boards and not vertical? Without knowing, it sounds more complicated to set them horizontally, the top board then seems cumbersome to put in place?

 

[JKrister]

okay thanks for the explanation! I understand, good tips! But why have horizontal boards and not vertical? Without knowing, it sounds more cumbersome to place them horizontally, the top board feels cumbersome to get in place?

To halve the number of seams without a backing rule

 

[Johan456]

If you set the studs upright, you place the boards. If you lay the studs, you lay the boards.

 

[Svensson91]

If you place the studs upright, you place the boards upright. If you lay the studs down, you lay the boards down.

will it be a disaster if I place the boards upright, or is it just "a bit worse"? The idea was that the builder's merchant would cut all the boards to the exact right height (235cm in this case). It feels like it saves me time to place them upright.

 

[Johan456]

It goes well, however, you need strips in all the joints on the long sides instead.

 

[Johan456]

Additionally, there is a risk that you are too theoretical, what is the ceiling height? If it is 235cm, you should cut the boards slightly shorter. It might not be completely straight and boards that are a few mm too long won't fit. If you're going to install skirting boards, you might as well cut them to 234cm.

 

[Plupp 170879]

Can suggest that there is also 12mm plywood with tongue and groove. It is of course more expensive but maybe worth it to avoid putting in a piece of board behind.