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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3answers
873 views

Can I connect laundry tub drain directly into floor drain?

I would like to install a laundry room tub directly over the floor drain. Can I simply have the tub drain directly into the top of the floor drain?
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2answers
735 views

Why is it so cold downstairs?

My house has a concrete slab foundation and the floor in the kitchen and living room is all tile. It is always freezing downstairs in the winter and I'm wondering if this is due to the floor or maybe ...
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2answers
758 views

Spilt bleach on stained hardwood floor

Unfortunately upon moving into our new rented flat we have spilt a small amount of bleach (about the size of a large coin) onto hardwood floor. Here is a picture: Is there anything we can do such ...
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1answer
256 views

How can I fix a floor joist that has separated from the cross beam?

I have just 1 beam that is no longer in the notch that is supposed to rest in on the crossbeam. The house is 100 years old. Would it be a safe option to install a floor jack to bring the beam back up ...
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2answers
496 views

How does one fix an unlevel, poorly-supported floor when you can't access it from underneath?

I recently bought a new home. Also on the property is an accessory building which I am using as an office. The building is finished on the inside and has a cheap parquet floor. I'm not sure what's ...
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3answers
146 views

How can I get 2X6X12's cut at a slight angle so I can build a level floor?

Here's my question - I am turning a friends small garage into a guest room and I need to place a wood subfloor on top of the cement floor. The room is 7.5' wide by 12' long and it slopes at a slight ...
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1answer
203 views

Would cork flooring underlayment help with vibration dampening in a sub floor?

Related question: HE Front End Washer vibrations on wood floors: any tried-and-true solutions? In hopes of being able to keep our new front-end HE washer (which we like) I've decided to bite the ...
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2answers
129 views

Direction of wood flooring

Flooring will run long ways parallel to walls in hallway. Then the hallway runs into the living room with a large white brick fireplace at the far end. How should the wood be laid? There is a bank of ...
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1answer
171 views

replace one tile bathroom floor

18" tile part adjacent to toilet and under the flange cracked during toilet install (plumber). first try result: replacement tile is too high, i I had to remove it. Complication: tile rocks due to ...
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2answers
464 views

Replacing floor boards, then sanding and varnishing etc

We've recently bought our first house (yay!) and are looking to have exposed floorboards throughout. However I realise it's a big job and due to work etc I'll probably have to tackle this one room at ...
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1answer
240 views

Is plywood or dimensional lumber better for repairing notched joist?

During a recent remodel, I came across a 3 inch deep by 5 inch wide bottom notch in a 3x10 (the beams are that old!). I must say, i'm just a diy'er and even I was beside myself that someone would do ...
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1answer
281 views

How do I glue moving ceramic tiles without removing them?

There was a problem with the pipes under the floor, which resulted in several ceramic tiles being removed. At the moment these tiles are back in place. The problem is that 2 tiles next to them, that ...
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2answers
2k views

When Laying Tongue and Groove plywood over 1x6 subfloor, do I lay it with the grain perpendicular to the floor joists or to the 1x6 boards underneath?

I am redoing a bedroom and I am in the process of installing a new sub floor. I currently have 1x6 running perpendicular to the floor joists. Some do have a bit of give to them. I am laying over that ...
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1answer
86 views

I have an old house (100 yrs) up off the ground and in the past year the wood floors have began to sag where the boards meet [closed]

I think my house is about 1oo years old, I have lived in it for 15 years and just in the last year the wood floor has started to sag or bouncy where the boards meet. I thought it was in the traffic ...
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2answers
91 views

How should I cut through hardwood floor?

I want to install steps to my basement. I need to saw through a hardwood floor. Is there anything specifically I need to do to the hardwood?
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1answer
119 views

Can I insulate under my condo's subfloor?

My condo does not have a basement. I have a subfloor with three dummy registers. I don't know why they are there. My heating ducts are in the upper part of the side walls. In the winter the cold ...
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2answers
832 views

What 'quick & dirty' finish for a concrete floor

I am moving into a new home for 1-2 year period. Its an old office building and the landlord is flexible with how I decorate; as it will eventually be totally gutted and renovated. My 3 rooms are ...
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2answers
251 views

Preparing surface when tiling over existing tiles

I'm retiling our bathroom and intend to tile over the top of the existing floor tiles. The floor is in fair condition at the moment with no cracking except in one place which I did myself and will ...
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1answer
18 views

selecting correct stain and varnish/poly/something else for oak hardwood floor

I'm going to sand down some oak floors and stain them with a darker color. I'm struggling with finding the correct products and process to do this. (I already have a plan for sanding) I have two 50lb ...
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0answers
20 views

How to resolve damp basement floor (possibly from capillary suction)?

First of all, as a kind of disclaimer, note that this is my first question ever asked on stackexchange, that I am not a native english speaker, and that I am a DIYer, not a pro. That being said, here ...
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1answer
22 views

How to frame a floor in an unfinished crawl space?

I've got a "crawl space" (really an unfinished space) under the main floor in a 2-story-with-basement house. I'd like to build essentially a deck frame and cover it in 3/4" plywood so that we can ...
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0answers
24 views

Microtopping over plywood

To achieve a modern look in our upcoming remodel we are considering doing microtopping over plywood. This should give us the concrete look we are after without pouring concrete (which we can't do ...
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0answers
23 views

Marmoleum in bathroom

I would like to install marmoleum (natural linoleum by Forbo) in my bathroom. It comes in variety of shapes: square and rectangular lockdown tiles (30x30cm etc) square and rectangular gluedown tiles ...
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0answers
30 views

3 concrete solutions OR do I need an engineer?

The home we moved into recently has a cracked and slightly sunken garage floor. We received 3 wildly different suggested solutions. I'd like to know if we need an engineer's assessment. We believe the ...
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0answers
25 views

Best/good way to remove linoleum squares on pine flooring

I have pine wood floors I want to refinish - but on top of the floor are square linoleum tiles. The adhesive is really strong. I tried pulling some up but it seems like a laborious task. I am also ...
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0answers
40 views

Why is water oozing from tile shower floor non stop

Our home is 4 years old. From day one the shower has been a problem. It is ceramic tile. There were leaks inside and outside the shower and the pan apparently had a hole in it and was replaced. ...
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1answer
27 views

Tile floor installation on top of hardwood

Can I lay the backerboard for a tile floor on top of hardwood floor that is glued to 3/4 inch plywood subflooring?
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0answers
14 views

Can I firm up a soft/squeaky floor by adding a plywood subfloor?

The hardwood floors in my old house sit directly on the joists. Can I make them firmer and quieter by screwing plywood into the boards from below? Do I need to account for expansion and contraction of ...
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0answers
27 views

Basement Floor Installation - Do I need a subfloor or can I use underlayment for warm floor

Live in Vancouver, BC. I'm in the drywall phase of my basement project and we would like to put down vinyl flooring. My unfinished basement has been ultra dry for the last 8 years as it has great ...
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2answers
100 views

What is causing the defined ridge and sunken surrounding floor on my second story floor? [closed]

House was built in '87. A defined warp (or ridge) has gradually appeared on my second story floor, in line with the load bearing wall. It appears that the surrounding floor has sunk while the load ...
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3answers
62 views

Painted concrete floor surface leveler alternatives

It seems there was a miscommunication and a contractor painted the concrete floor by mistake. I know that the proper way would be to remove the paint but I try to avoid that because overall project ...
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0answers
36 views

Are Slick Strips (UHMW tape) slippery enough to slide a car

I have a small sports car (~500kg/1100lbs) which takes up too much room in my garage and I want to build a system to slide the car to one one side to free up some space. I have heard that Slick ...
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1answer
52 views

How to transition between 2rooms when gap is wider than standard 2“ ” t molding strip laminate

How can I transition between 2 rooms if gap is wider than standard 2"t molding strip for laminate floor? Looked for wider strip but could not find one.
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2answers
64 views

Self-leveling alternatives to gypsum concrete (Gyp-Crete, Pyrofill, Securock) over OSB?

Replacement options for < 1.5 inch pour? Details: Bathroom remodel (new tub, tile wall/floor, toilet, vanity). Old tile floor came up with finger pressure, found that the gypsum concrete ...
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2answers
53 views

How to remove stains from tile?

I have a very weird stain on the bathroom floor of an apartment I just moved into. Is there an easy way to remove this stain? Also, what is the material of this tile? Is it like a concrete tile? ...
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0answers
58 views

Fill gaps on deck boards. Deck is now a sun room

We have enclosed a deck and the owner wants to keep the look of the deck floor. The floor has spray foam insulation on the under side. We want to fill the gaps in the floor. What would be the best ...
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0answers
24 views

What type of insulation should I use for varying joist spans of 3-4ft?

I live in the #3 region in California, and am wondering what the most cost effective and functional DIY method for installing insulation under my floors. I have kneeling room crawl space under my bi-...
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0answers
180 views

Installing a floor for storage above detached garage?

We have a gabled-roof single-story detached garage with horizontal 2x4 beams spaced four feet apart and a 20' span. There are two vertical 2x4 beams connecting the two horizontal center beams to the ...
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0answers
42 views

Thin-set mortar advise

I was advised by Home Depot tech and bought a thin-set mortar VersaBond. Then, after I came home, I watched a Home Depot video on how to prepare my kitchen cement floor for laying on a 13.5" X 13.5" ...
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0answers
147 views

How to seal joint between stone foundation wall and conrete cellar floor

In my 1910 vintage Baltimore row house, the concrete cellar floor was laid after the construction of the house. The joint between the irregular surface of the stone foundation wall and the concrete ...
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0answers
53 views

replacing subfloor

How does one replace the sub floor? I will redo the bathroom and need to get to the pipes under the sub floor. This is the first layer of flooring... so it is installed before the walls went up. ...
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0answers
71 views

How do I replace 2x4 outdoor decking with 1x4 hardwood decking?

I have a small entry area deck outside my front door, roughly 70 sqft. The deck is currently made of 2x4's and a few 2x6's screwed into ~16" on center floor joists. I replaced the front door and ...
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0answers
30 views

Solid oak wood floor acclimation time?

I am currently about to install a solid wood oak floor. The wood is to be delivered tomorrow if I measure the damp readings and the solid oak floor matches the readings of the subfloor would it be ...
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0answers
37 views

Damp carpet and pad in two areas of basement

We have lived in our home for 43 years. The basement has always been dry. The house has drain tile and a sump pump and the sump has only run three times in all this time--only after very heavy rain. ...
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0answers
114 views

How to install bathtub

I want to install a tub on basement bath where drain pipes are already installed and sticking out from concrete floor. I need to know how to raise the level of the tub from the floor in order to have ...
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0answers
65 views

Thin plastic floor covering

I have laminate flooring coming right up to the base of an external door. This door gets a lot of footfall, and has started to wear the top surface of the laminate where it meets the base of the door. ...
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0answers
123 views

Transition laminate with t-molding to tile

I need to transition where the laminate is higher than the tile. The laminate is 12mm so the tile is about 1/8" below the laminate. I have t-molding and metal track but there is a gap on tile side. ...
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0answers
48 views

metal flexing sound from 2nd floor

I bought my home 6 months ago. When we moved in last summer, we didn't hear this sound. Now when I step on particular spot on this one bedroom, I hear metal flexing sound. I am guessing the duct is ...
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1answer
34 views

Whats size concrete aggregate

Not sure on what size stone/gravel i should use, 10 mm or 20 mm in my cement mix 1 cement + 2 sharp sand + 3 gravel (10mm or 20mm) ? I need to fill 4 gully's in an internal concrete floor, each about ...
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1answer
67 views

Seamless construction joints on concrete floor

By construction joints I mean the joints between a batch of floor made one day and the new work in a following day. What is the proper way to get the most seamless joints when making finished concrete ...