Questions tagged [self-leveling-concrete]

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Use mortar between OSB and old concrete subfloor, in shower?

Replacing a shower pan in a 32x32 alcove. The prior acrylic base was bedded in mortar on top of concrete subfloor. The new pan I intend to buy has an OSB and foam underside, seemingly meant for a flat ...
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How to prep this concrete shower floor for a replacement acrylic base?

Ripped out a shower surround, replacing with new wall panels and shower pan. The prior pan was set in some cement or thinset, and that's left a very uneven surface. How do I prep it for the ...
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Can you put Hardy backer board on top of Mapie self leveler plus?

I have already applied self leveler in my bathroom over brand new plywood subfloor. I have got Mixed opinions if I can use Hardy backer board on top of the self leveler.
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Hiding a severely dished bedroom floor

I have a bedroom with a hardwood floor that is severely out of level. I would say is is 1.5 inches out of level over 6 feet, with the lowest spot in the center of the room. I do eventually want to fix ...
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215 views

Self-leveling concrete prep: how to fill large gaps?

[Note: Variations of this question have been asked before, but the ones that received answers were talking about sealing gaps for other purposes. So here goes.] TL;DR: I have 3/4”-1” gaps at the edges ...
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Peel and stick vinyl on existing tile - how to best level the tile floor for installation?

I knew installing peel and stick vinyl planks on uneven surfaces was a bad idea, but I decided to go ahead anyway (big mistake). It looks a lot worse than I originally expected, as the bulge is very ...
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Best way to correct one inch dip in middle of second floor master?

We’re installing hardwood flooring in our second floor master bedroom. House was built in 1993. When we pulled off the carpet we realized the floor dips in the middle. The room is 18 ft (north-south) ...
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27 views

Can I apply self leveler primer over painted(primer) wood subfloor

The instructions say the wood needs to be bare wood for all the self leveling compounds like Henry/cbp/mapei but there are also plenty of videos that show it being applied to various levels of clean ...
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tiling a floor that is not flat

I want to tile a concrete floor that has 1950s tile already installed on part of it. The problem is, one edge is out of flat with a slope change of almost 1" in the last 2 feet. Other than that ...
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2 votes
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166 views

Should I attempt to level my basement slab before installing vinyl plank flooring?

I am getting my basement bathroom finished. We found the concrete floor is not 100% level during tub installation. My plumber used mortar under the tub to level the tub. Please look at the gap between ...
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Fast set concrete or self leveling concrete for the mounds under the shower base?

This is a follow up for this question Do I still need concrete mounds under my shower if the floor is perfectly level (I poured self leveling cement) The manufacturer instructions say "mounds of ...
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Can I level basement floor with cement board and self-leveling cement?

I have about a 1" height difference on my concrete basement floor. My understanding this was for drainage in case of flooding. I have a wall in the way of where anything could potentially drain ...
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How do I level a hardwood floor with minimal damage?

I'd like to soundproof my living room floor in order to minimize impact from footfall and airborne sound transmission from a piano. My general plan is to install soundproofing mats on top of the ...
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Assume the underlaying concrete is stable and solid, can you pour self leveling concrete and leave it like that for walking and as a garage floor?

Assume the underlaying concrete is stable and solid, can you pour self leveling concrete and leave it like that for walking and as a garage floor ?
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How can I flatten a hardwood floor in preparation for new flooring over it?

I have a second floor with T/G hardwood flooring that is in very bad shape. I have decided the easiest solution for me is to float new engineered hardwood over top of the old hardwood. There is no ...
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perimeter/barrier/dam on thinset for self leveling compound

What product or methods can I use to create a perimeter/barrier/dam on thinset for self leveling compound in a doorway? I'm pouring 300sf in sections as the SLC has limited working time. Thermostrips ...
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How to level a floor that got out of level from a beam breaking underneath the house

So I tried to get pictures, but I couldn't get any that you could really see how unlevel the floors are. I want to be clear, I am a frame carpenter who is familiar with the correct terms, and I am ...
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2 answers
91 views

Should you repair the entire floor before refinishing a basement or go room by room

I'm in the planning stages of a basement refinishing project. The basement has a concrete slab that is in decent shape but needs a few things: Some sizable (6"x6"x1/2") protrusions ...
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3 answers
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Leveling concrete for bathroom installation

I am installing a bathroom in my basement. There is a low spot in the concrete right were the base of the toilet would sit. What is the best way to level this so I don't have a rocking toilet? The ...
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2 votes
0 answers
2k views

What's the difference between Henry 547 UniPro and 549 Feather Finish?

I'm preparing to smooth out my 3/4 tongue-and-groove plywood subfloors for an LVP installation, using Henry products per the flooring's installation instructions and local availability. I had settled ...
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Cheapest way to level large concrete floor without losing height

I have an old building that I am converting into a living space. The slab foundation is very old and uneven in a lot of spots. I need to level it, but I can't increase the height of the floors too ...
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2 votes
1 answer
544 views

Subfloor repair for LVP installation

I'm preparing to install luxury vinyl plank in the living area of the second floor condo I just bought (carpet was installed previously). It's a woodframe condo with a wooden subfloor built in 1985, ...
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1 answer
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Filling in low area to create platform with concrete / leveling

I have some steps going off the back door of a house (from the 50's) that I'm working on and am attempting to help prepare for market / sale (USA). The steps go down to an easement which runs ...
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1 vote
1 answer
63 views

How to prep and level part of my garage when there is a 6" difference in hight?

Specs: Garage floor is cement 24'x32' (except where the car will park.) far side is approximately 6"lower than the other. (~1° slope) large crack running the full length. a number of smaller ...
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1 answer
106 views

Enclosing an attached carport w/ concrete slab. The slab is not completely level. Pour concrete over existing floor or install wooden subfloor?

I am assuming my location may matter on this topic. We live in north Texas north of Dallas approximately an hour. We are enclosing an attached carport w/ concrete slab foundation. The slab is not ...
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1 vote
0 answers
172 views

Filling expansion joints before self-leveling concrete?

I am adding self-leveling concrete to my basement flooring. I have expansion joints which are currently filled with a joint compound. How would I fill in the expansion joints so that I can cover the ...
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2 answers
92 views

Leveling settled concrete pad

I am looking to convert an old garage into a workspace. The total concrete area is about 20ftx22ft, and has one seam down the center. The pad on the north side of the seam is level. The pad on the ...
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What are thickness minimums and best type of concrete to fill floor dips?

I have a large room (~775 sq. ft.) with concrete floor. Prior owners had converted a garage to living space. I need to level the floor before laying laminate. For the final leveling, I'm planning ...
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27 views

Is slower hardening self leveling compound available

I have a large concrete floor (775 sq. ft.) I need to level. I did a poor attempt once 10 years ago on another floor and want to do a better job this time. It seems many products can only be worked/...
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1 vote
0 answers
2k views

How to level a sloping concrete slab with a 2” difference?

I know this sounds bad and I need to give some backstory to not sound off the alarms... I’m going to give the main question first and then backstory below so you know I’m not crazy. Question: We have ...
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Level Concrete slabs

We bought our house and there is a shed in the yard that was 2 sheds right next to each other. It was recently torn down (not by me) and rebuilt. It's nice to have one single space the only problem is ...
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Lay a damp proof membrane followed by a self levelling compound

I have an uneven concrete floor inside. I need to put down a damp proof membrane and self levelling compound on top of that. My questions are: Is there any reason to use a roll of DPM vs a liquid one ...
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651 views

"Floor-leveling compound" for a Kohler Tresham shower base

I have recently purchased a Kohler Tresham shower base with bench. I read the directions very carefully, and at step 4 (you can see the guide here: https://www.us.kohler.com/webassets/kpna/catalog/pdf/...
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10 votes
2 answers
5k views

Filling in a sunken living room to level of other floors

My sunken living room floor is concrete slab surrounded on two sides by higher concrete slabs at the level of the rest of the house. The other wall is a brick fireplace hearth. The wall opposite that ...
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0 votes
2 answers
98 views

Self levelling compond on an oily floor?

I've just moved in to a new house and I want to level the floor in the garage but it's covered in oil. A quick Google throws up a blog post and product by Polycote but nothing else specifically ...
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When would you use "hot mud" or setting joint compound for leveling concrete?

To my surprise (or ignorance) the bag of 'hot mud' I bought specifically says it can be used for : leveling interior above grade concrete When would this be an appropriate choice, and does it have ...
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1 vote
1 answer
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Engineered hardwood over uneven basement subfloor?

I purchased a house 2 years ago with a partially unfinished basement but had all the supplies to finish. I am getting around to doing the flooring soon. I have nice oak engineered hardwood flooring ...
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1 answer
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Process and product to fix concrete slab surface issues prior to framing over them?

I have some issues with the slab that was poured for a garage, and I need to frame an interior wall over a bad area. The slab was poured with a bit too much water (5.5 slump) on a hot day in July. I ...
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2 votes
2 answers
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Should I level my basement floor if installing a subfloor?

I'd like to install a subfloor in my basement including that dimple stuff to allow moisture to dissipate. Currently, it has sheetrock walls and trim with painted concrete flooring, but that's it. A ...
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2 votes
2 answers
4k views

Is it better to use thin-set or self-leveling concrete on top of a shower pan, mud-bed to improve the slope and make it smoother for final tile layer?

Issue: I am looking to improve the smoothness of my my concrete mud-bed before I lay my thin-set and tile. The mud-bed has dried, but there are some dips and divots that make it difficult for me to ...
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1 vote
2 answers
329 views

Laying Stone on a unlevel concrete surface

first and foremost thanks for the help :) I am in the process of redoing my porch and I have hit a road bump along the way. I am planning on laying real thick stone (as seen here) on the porch floor. ...
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1 vote
1 answer
4k views

protect drywall from self-leveling cement pour?

I'm finishing my home basement, and I made the mistake of installing the drywall before deciding to level the concrete floor. So I'm trying to determine whether or not I really need to protect the ...
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7 votes
6 answers
2k views

How to laser-level close to a surface

Many self-leveling lasers, including my Bosch GCL 2-160, have a limitation when used to level a ceiling or a floor: the horizontal laser beam often cannot get within several inches of the ceiling or ...
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1 answer
441 views

self leveling layer with internal French drain

I am planning to pour a layer of self leveling sealant such as levelPro to level out my basement floor and cover / encase some possible problematic vinyl tiles. It's an older house, and I believe it ...
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1 vote
2 answers
1k views

Pouring self-leveling cement to a given depth [closed]

I am renovating a bathroom and installing radiant heat under a tile floor. The subfloor and cement backer board were installed without considering the finished height of the floor. What is a good way ...
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1 vote
1 answer
2k views

Self leveling showing popped bubbles and small chunks

I did self leveling concrete in my basement as below But some spots showing small holes, potentially from popped bubbles And some have little pieces like chunks not mixed well I plan to install ...
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2 votes
2 answers
4k views

Using self leveling cement in basement bathroom around drain

Should you a use self leveling product over the slope towards a drain in the concrete floor in basement bathroom? We are wanting to install luxury vinyl plank in the bathroom and most sites say to ...
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1 vote
1 answer
2k views

What are my options to level a concrete driveway?

I have quite an old house that was built in the 40s. During the heavy rain and winter seasons, I typically get large puddles of water in-front of my garage that seeps slowly through the weather strip. ...
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1 vote
1 answer
2k views

How to seal hardwood floor in preparation of self-leveling compound?

I'm planning to float laminate over my existing floor, but need to level it first. The floor area is very large, so it spans areas of the home that have differing subfloor materials: concrete, ...
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2 votes
2 answers
2k views

Leveling options for bumpy basement floor

I have a 125 year old townhouse with a large (700 sq ft) basement. We had waterproofing done (vapor barrier, perimeter drains, sump pumps) last year that dried everything out and made the space usable....
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