Carpet Installation- footings lower than floor

[spinspokes]

I have a problem I'm trying to figure out before getting carpet installed. When the concrete slab was poured in my basement they did not match the grade of the footings. The footings are about 1/2" below the concrete floor.

My question is, how do I fill this to bring it level for my carpet installers?

Any help is appreciated!

Thanks,

 

[Floorist]

How far out from the walls does the lower footing stick out?

 

[spinspokes]

It extends about 2 1/4 inches. Just measured...it's closer to 3/4 inch in depth difference.

 

[DarisMulkin]

Glue and nail in some 3/4' plywood. Just make sure it is pressure treated or marine.

Daris

 

[spinspokes]

Thank you for the idea.

Anyone have any thoughts on using some type of thin set or self leveling material to bring up to grade?

Just curious if a thin set or self leveling material would bite into the footings enough to have the tack strip nailed to them without wanting to pull up from the footings...

 

[Floorist]

Anything like concrete or thinset would be too thin to hold tackstrip. It would just crack when you nail into it.

 

[spinspokes]

Yeah, that makes sense...my only fear is that it's not 3/4" all the way along the wall, hence I was looking for flexibility in choosing a filler material.

 

[highup]

Thank you for the idea.

Anyone have any thoughts on using some type of thin set or self leveling material to bring up to grade?

Just curious if a thin set or self leveling material would bite into the footings enough to have the tack strip nailed to them without wanting to pull up from the footings...

Do what Daris said and use a urethane construction adhesive. Chip off any chunks or high spots and clean it good. Maybe even wire brush the area, then vacuum before gluing the plywood in place.
Filler or thinset will probably chip out if you nail into it.

You should also consider cutting the strip of plywood into short pieces, so that it conforms the the floor. (footing) Long strips of plywood will usually be bowed , so short pieces (10") need less babysitting to get them to conform to the floor.

 

[spinspokes]

Great advice, thank you!

 

[highup]

Treated plywood might sound nice, but adhesive might not stick to it. Buy something that's decent quality.

 

[Ernesto]

I would definitely float it out with a high psi cement based patch, then glue and nail after it's totally cured - might need small cuts or 1 in fluted nails. Just gotta get the feel for it.

 

[Floorist]

Like Highup said, treated plywood is wet. Nothing will stick to it.

 

[Ernesto]

If all else fails use tapcons. http://www.concretefasteners.com/an...816yzbGwLjPpms_HpJmAYZArbyMI3mmIz1BoCkfTw_wcB