Questions tagged [floor]

For questions generally relating to the structure and construction of floors in buildings, including designs, materials, support mechanisms, load-bearing calculations, etc. For questions specifically about the top-layer covering of a floor (tile, carpet, hardwood) see the "flooring" tag.

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Identification of a house-wide magnetic system [closed]

Magnetism is a guess. I need help identifying some remote controlled installation that affects every room of the house. If I lay down on my back on a mattress my head or limbs get pushed upwards ...
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Is there a way to make tiles outside a home not slippery?

The tiles at my front door get very slippery when they’re wet (ie. rain or sprinkler watering). Is there anything I can do to make them not slippery?
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Is OSB ok under cement board for tile floor

I've read that OSB is not suitable as a flooring substrate for tiles. But if the substrate will be cement board, is it ok to use OSB beneath that for subfloor repairs?
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Remove white spots from luxury vinyl plank flooring

I just moved into an apartment where the floor needs some additional cleaning. The following are two pictures I took (click to enlarge): The floor is vinyl wood (Luxury Vinyl Plank Flooring). I tried ...
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Help ! Weyroc / uneven floor needs levelling

we have had an extension built on the back of an old house and they fitted a floating floor with Weyroc top. We have bifold windows right across and want to put in flooring. Problem is that the floor ...
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Raising Sunken living room - Load concern

I want to raise the living room so it is level with the rest of the house. I have all the dimensions and how I will be doing it. However, I am concerned about the load as there is a basement below. ...
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1 answer
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USG Fiberock underlayment used for tile installation

I reinstalled the tiles in the laundry room and the installer used USG Fiberock, instead of Hardiebacker - as initially told me. He’s telling me that USG Fiberock is good for laundry room. But now I ...
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integrity of unreinforced 6-inch concrete slab floor for a 15mx20mx1.8m pool

Our church built an in-ground pool with the following dimensions: 15m x 20m x 1.8m (roughly 540cum) in our retreat center. However, no reinforcing bars were added when a 6-inch thick floor slab was ...
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Adding a half inch of height to subfloor for laying floating porcelain tile

I am laying floating porcelain tile that is a half inch thick. I also have to lay down an underlayment under the tile. After accounting for both of these items I come up about a half inch too short ...
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1 answer
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How to remove the fireplace hearth

I have removed a fire place surround. And removed the piece that sat on the floor in front of the fire. Before removal But after removal there is some kind of cement that is on the floor in front and ...
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Garage drain isn't draining, how can I figure out where it ends?

My house is a 1977 ranch with double garage underneath and it has septic tanks. A round drain in the garage seems to go to the left as that's where the vacuum hose goes when I put it in the drain, but ...
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Acclimating hardwood weight concern

I am having 3/4" red oak hardwood floors installed (1200 sq ft) and need to acclimate the wood. The floor is supported by 2x10 joists (16" center) with a 13 foot span. Can this wood be ...
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3 votes
1 answer
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How to connect mismatched height baseboards?

I had a wall put up where a closet used to be and want to put in baseboard at the bottom. I have found that the floor is actually uneven and tapers at the end. So if I push the baseboard in for the ...
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6 votes
3 answers
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Why can't you install larger floor tiles without thinset/adhesive?

I can understand the need for adhesive for wall tiles. But if you have a flat floor, and medium to large tiles, why can't you just lay your floor tiles on the floor without any thinset and grout it. ...
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2 votes
1 answer
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Will these floor joists support a new soaker tub installation?

I am installing a 3ft. X 6ft. soaker bath tub that will weigh almost 1200 lb. dead weight when filled with water. The tub will be parallel to two existing 2x10 floor joists that have a 11ft. 3in. ...
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1 answer
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Can we use hybrid water heater for radiant floor?

We have a concrete slab radiant floor that is currently heating by propane tankless boiler (Lochinvar NKC199N), but as you know LPG is expensive and not quite efficient. Now, I am thinking about ...
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Should I use solid lumber or plywood to repair a floor joist?

Is it better to sister a 2x8 floor joist (cracked somewhere in the middle) using same size lumber or is something like 3/4 plywood better? Consider that both ends of the newly sistered joist won't ...
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Condensing boiler outlet temperature for floor radiant

We've just installed a new Condensing Combi boiler last week, Lochinvar NKC199N. I've noticed the installer set the outlet temperature to 180F/82C and the return temperature to inlet is somewhere ...
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Best way to stiffen up floor

While gutting my basement I want to strengthen my floor above to make it move less. Currently the floor above moves a lot when people walk around, making it really loud in the basement and causes ...
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Wood filler between old and new hardwood strip flooring?

House was built in 1983 and had 2-3/4" strip flooring on most of the main floor. When we bought the house in Winter of 2020, we had the two remaining rooms stripped of carpet and had hardwoods to ...
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Why are the edges of our subfloor wet after rain, but the walls are completely dry?

Our house has a stucco exterior and a dirt crawlspace, part of the crawlspace is wet, but there isn't much water pooling down there. Where the water is pooling, the subfloor is completely dry. The ...
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5 votes
1 answer
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Floor supported by nails, is it structurally sound?

Each time I look under this floor it bugs me; how can so few nails support an entire floor? Is this standard construction practice? It is an 80s house in Canada. New pictures to satisfy your ...
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Can I add plastic moisture barrier under my conventional floors without further damaging wood floor joists?

I have a conventional 2x8 floor that is 40 inches off the ground. The crawlspace has 6"x12" vents on all sides of the house, spaced every 12-15 feet. We live in a humid area. Can I add ...
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1 vote
1 answer
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Which kind of professional should I call to fix my creaking floor?

Landlord worries about me screwing through pipes that run under the flooring (though I wonder whether that concern is justified). I'm not terribly gifted in DIY anyway and I'm guessing this problem ...
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2 votes
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How can I make my glossy tile shine again?

I have this floor in the entry foyer of my home. You can see there's a small portion (near the top of the photo) that is shiny, but most of it is dull and scuffed (like in the rest of the photo). How ...
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6 votes
4 answers
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Garage loft max loading

How much load can this garage loft handle? The garage is 24' wide. The floor of the loft is 2x10s 24" OC. Those are 2x6s to the left of the plates (the 2x10s run all the way from those left ...
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0 votes
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Installing a vent grill when the floor is finished

Is it possible to install an HVAC vent grill in the finish floor? This is in the attic space under a sloped roof, where the floor doesn't run all the way to the roof, so we actually have access to the ...
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1 vote
1 answer
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How to shim shed floor joists resting on sleepers

I have a 12 x 14 shed with 16 inch on center floor joists resting on sleepers on the two ends and in the center to support the down. However some of the 2x6 floor joists on the end are shy of being ...
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How to fill a second-floor conversation pit?

House was built in 1961 and has a "conversation pit" on the second floor. It may have been added when the house was last sold in 1976, see photos. I'd keep it, except whoever installed it ...
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2x4 floor joists in attic: make stronger/level?

My house is 100 years old in Ontario, Canada. My attic is unfinished, and the joists are true to size (2” x 4”) rough sawn 2x4s (two 10’ pieces make up the 20’ span), 16” OC, cathedral roof. Supported ...
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6 votes
3 answers
940 views

How should I repair this floor joist that is too short?

My son recently bought a 100 year old house. We have been working on some framing repairs in the basement, and have some questions about the best way to sister some joists. This is a balloon framed ...
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1 vote
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Reinforcing a Subfloor Before Installing Tile

I want to reinforce my bathroom subfloor before I install Hardiebacker and tile. The original construction is 4-in X 6-in beams 4-ft O.C. with 1 1/8-in T&G plywood spanning the beams; there are ...
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How to Undercut Walls for Floating Floor Between 2 Concrete Walls

I'm laying down NuCore LVP floating plank floor in a room with concrete/brick walls on either side and was wondering if it's possible to slide both sides of the floor into my undercuts. I have done ...
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Replacing sub floor, that is under a concrete floor

House was built in the mid 60s. It's on piers with a craw space. While having it leveled, we discovered rot under the half bath. The water leak is fixed. However discovered the sub floor that needs ...
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Stacking LVT boards upstairs

I've just had a load of evocore LVT boards delivered (40 packs of 7 boards), which I dutifully dragged into my house. I can't find a weight for each pack, but they are pretty heavy. I took them ...
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1 answer
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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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Replace strips of tongue and groove subfloor

A corner in my laundry room is sinking/rotted, the construction is tongue and groove with particle board on top. I suspect the rot probably goes into the tongue and groove planks. How do I replace ...
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0 votes
2 answers
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Is it possible to change a floor mount receptacle from raised to flush?

We just built a new home and had a couple of floor mount receptacles put in the living room to accommodate for where furniture is placed away from the walls. The GC put in raised floor receptacles ...
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2 votes
3 answers
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Tiles above concrete, with electrical conduits

To convert part (about 3x8 meters) of the unused attic to a storage area, I want to tile the concrete subfloor with ceramic tiles. The problem is that there are several corrugated flexible hose pipes ...
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3 votes
3 answers
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Will a typical house floor carry a 300 lb. safe?

I am going to upgrade my home safe. The safe will be on the second floor, which is the top floor. The safes I am looking at weigh 350 to 500 pounds. I could probably get by with a 300 to 350 pound ...
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2 answers
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How should I fix sag in joists and floorboards?

I have a very unlevel floor upstairs in an old house (probably > 100 years). As far as I can tell, some of the joists were pushed down by the weight of a brick wall between the landing and a ...
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Fix oil stain on wooden parquet floor

I placed a bag that had something in it that was leaking vegetable oil on a wooden floor, and I now need to fix the problem. I've tried contacting multiple professionals, but it seems this is too ...
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We have concrete efflorescence forming between the planks in our basement, how can we eliminate it?

We have concrete efflorescence forming between the planks in our basement floor. How can we eliminate it?
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1 answer
90 views

How to anchor floor lags with concrete slab

I have the apartment with the floor build from wooden lags on concrete slab. The concrete slab is hollow slab 220mm height that is both ceiling of the downstairs neighbours. Wooden lags are now ...
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1 vote
1 answer
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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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Old floor blending with new

We have two very different colors of floor, new vs old. We liked the rich color of the old wood when we applied wood conditioner. This same color can be achieved with red oak stain on the new, so ...
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New baseboard on old wood floors

We are getting our floors refinished and I would like to replace the baseboard + shoe moulding with baseboard only. The problem is the original wood floor installation used shoe, so right now, shoe is ...
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Floor load capacity calculations

I want to set up some weight lifting equipment in a room on the first floor of my house. There is an unfinished basement below. (Big disclaimer: I am not going to use the results of this calculation ...
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2 answers
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Epoxy floor and HDPE foil (Polyethylene) react under pressure?

I am planning to protect my epoxy floor from scratches with a 0.15mm HD polyethylene foil during some furniture install work. The epoxy floor has a glossy clear coat and is installed since 1+ years. ...
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2 answers
831 views

Remove protruding garage foundation concrete curb

Please advise per the attached pic if it's possible to trim/remove the protruding part of the garage foundation block to be at the same level of the baseboard above it. Please let me know. Thanks.
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