Insulating gap between interior brick wall & wood floor?

[branimal]

I need to insulate the gap between my brick wall and the wood floor.

I’m going to rip out the stud track and add another strip of wood flooring to give it a finished look.

I will also be putting molding over the remaining floor gap.

What type of insulation should I shove in the gap before I add the new flooring and moulding. I can feel a draft coming up the gap.





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[ItsNemo]

Spray foam would be my first guess since it will both insulate and air seal. I'm having a hard time figuring out what I'm looking at from the picture though, can you take a wider shot?

 

[NUTTSGT]

I'm not really sure what I'm looking at either but I'd guess spray foam or pack it full of mortar.

 

[branimal]

Sorry for the pic without sending the bigger picture (no pun intended). The arrow shows where that gap is.




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[dave_dj1]

That looks to be an expansion joint. I would get some foam backer rod (it comes in different diameters) and put in the gap then maybe some caulk over it to seal it up.

 

[kbs2244]

Expansion joint for sure.
Put in something will expand and contract
What ever edging you use be sure the main floor can slide under it.
If you do not understand the need, get a floor guy to explain.

I would expect your "stud track" was not nailed to the finish floor.
And there was a gap under the trim for expansion room.

Wood floors grow and shrink with the seasons

 

[yeldogt]

What's the floor made out of ....and what is below -- basement? Looks like a common city wall that you want exposed? did they place the metal stud on top of the old floor?

I alway use spray foam along those areas == the old basements are cold and impossible to insulate. Spray foam will allow for movement.

 

[rlitman]

Another +1 for spray foam. Just remember that urethane foams like Great Stuff expand a lot, and don't clean up easily. Still, in a hidden space like that, it's the best option.

Option 2, also spray foam, would be a latex based foam. Dap makes one such product. It has the structural integrity of shaving cream, but it cleans up as easily as latex paint, and doesn't expand any more after application. So, if you're using it where cleanup can be an issue, then it may be a better choice.

 

[branimal]

Insulating gap between interior brick wall & wood floor?

The stud track was screwed to the subfloor.

The gap between the the subfloor and the brick wall is about 1/2-1” wide.

The gap between the finished wood floor and the brick wall is about 4”.

I was planning on ripping some new finished floor to 3” leaving a 1” gap with the brick wall.

I’ll put some foam backer rod in the gap between the subfloor and the brick and then caulk or spray foam it as suggested by many on this post.

That messy edge will then get covered with moulding.

Does that sound about right?



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[yeldogt]

The best way is naturally the most work. I like to take the moulding used on the other walls around onto the brick wall -- it makes for a "finished" look. Typically, it's an older building with larger baseboards. You chip out the brick areas that are proud so the board fits straight along the wall .. there is always one or two that cause problems .. it's something you have to "eye" --- fill the joint with mortar. Have done same with stone walls.

If you try and just make the floor wall connection -- it never looks finished and the joint moves too much anyway. With the baseboard in place the quarter round fit tight agains the floor. FYI -- don't nail quarter round to both baseboard and floor. One or the other.

 

[kbs2244]

Good advice from yeldgot
You can tell he has done it before.

 

[Christy]

I need to insulate the gap between my brick wall and the wood floor.

I’m going to rip out the stud track and add another strip of wood flooring to give it a finished look.

I will also be putting molding over the remaining floor gap.

What type of insulation should I shove in the gap before I add the new flooring and moulding. I can feel a draft coming up the gap.





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I'm dealing with the same thing! I took off failing plaster from an old brick wall. The wall runs parallel with the floor joist so I've got a huge gap between the floor and the wall. I've thought about spray foam but then I feel like it needs to be finished off with something a bit more sturdy.. curious what you ended up doing. Short of making up some extremely wide baseboard, I'm still trying to figure this out.

 

[rayra]

Insulating gap between interior brick wall & wood floor?

The stud track was screwed to the subfloor.

The gap between the the subfloor and the brick wall is about 1/2-1” wide.

The gap between the finished wood floor and the brick wall is about 4”.

I was planning on ripping some new finished floor to 3” leaving a 1” gap with the brick wall.

I’ll put some foam backer rod in the gap between the subfloor and the brick and then caulk or spray foam it as suggested by many on this post.

That messy edge will then get covered with moulding.

Does that sound about right?



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They're not suggesting backer rod AND caulk / foam, it's stuffing foam backer road into the gap OR caulk / spray foam. You don't need all three.

Stuffing the right-sized foam backer rod into that gap is all you need.

Sika 3/4 in. x 20 ft. Closed Cell Backer Rod, Expansion Joint Polyethylene Foam 108130 - The Home Depot

Sika Backer Rod is used to partially fill deep expansion joints and cracks before application of your sealant. It helps prevent 3-sided adhesion while allowing you to control the depth of the sealant.

www.homedepot.com