
How to Repair Subfloor from Underneath?
- Assess the Damage. The best way to assess the condition of your subfloor is by examining it from underneath. Find a...
- Determine the Cause of Damage. If the damage has been caused by moisture, ask yourself, where is it coming from? If the...
- Prevent Leaks Before They Happen. Typically, if the damage is caused by water, it is vital...
How much should it cost to replace a subfloor?
The cost of your subfloor 1 replacement largely depends on the square footage of the area. On average, you can expect to pay between $3 to $12 per sq.ft. to replace the subfloor in your home. The price you pay depends on where the subfloor is located, the materials used, and whether or not the installer installs the floor around walls.
How to replace a rotten subfloor under a wall?
The supplies you will need are:
- A saw to cut your subfloor
- Pry Bar
- Plywood
- Tape Measure
- Galvanized 8D nails or deck screws
- Screw gun, or nail gun
- Safety goggles
- Marker
- Drywall Jab Saw
- Hammer
Do I need to replace my subfloor?
Under normal conditions, a subfloor can last as long as the house itself. However, should a subfloor be damaged or defective, it may only last 20 to 30 years. Should this be the case, a homeowner might need to peel back the layers of flooring and get to work. Here are five signs it’s time to replace a subfloor.
How do you repair a rotten floor?
The Swarthmoor Quaker Meeting House has been impacted by wet rot and woodworm which has seen the main ... The woodworm infestation has also affected the gallery and balcony first floor. “The repair works identified in this application are being carried ...

How do you replace a subfloor under a bottom plate?
0:204:54How To Repair Subflooring Damage Under Non-Bearing Wall - YouTubeYouTubeStart of suggested clipEnd of suggested clipNow I would recommend starting with just cutting a section out. And to make sure that the wall studMoreNow I would recommend starting with just cutting a section out. And to make sure that the wall stud doesn't. Lower you know cut a section out pull the pole. This piece of the plate out.
How do you fix subfloor rotted water damage?
How to Fix a Water-Damaged Subfloor: Your 8-Step DIY GuideStart by Stopping the Water. ... Expose the Subflooring. ... Make Your Mark. ... Carefully Cut Subflooring. ... Remove Damaged Materials. ... Speed Up the Drying Process. ... Reinforce Floor Joists. ... Install Your New Subflooring.
How do you replace a rotted section of a subfloor?
0:105:46How to replace repair rotted sub floor, rotten floor. Easy! Home MenderYouTubeStart of suggested clipEnd of suggested clipFirst thing I need to do is find out which way my joists are running. I want to reach in and I canMoreFirst thing I need to do is find out which way my joists are running. I want to reach in and I can feel the joist this. Way.
How do you fix water damaged subfloor under the wall?
1:4711:07How To Repair Damaged Floor Framing Under Load Bearing ...YouTubeStart of suggested clipEnd of suggested clipThe first step will be to remove. The drywall in the damaged area. And I hate to say it butMoreThe first step will be to remove. The drywall in the damaged area. And I hate to say it but sometimes it's going to be better to go a little farther. Back in some of these spots.
Does water damaged subfloor need to be replaced?
The best choice for damaged subflooring is usually to have it replaced — especially if it is growing mold. In severe situations, it may feel like replacing the flooring is the only action you can take.
Can I put new subfloor over old subfloor?
Install a layer of at least ½” or preferably 5/8” ply over the existing planks. This is particularly important if your old sub floor has lumps and bumps in it. If you don't respect this thickness of ply, then you're highly likely to see rises and falls in your new flooring.
Can you replace a portion of subfloor?
If the water damage has been occurring for a while and there are signs of flaking wood or mold, the only option may be to replace the affected section of subflooring. Start by removing the finished floor (hardwood flooring may be reusable once it dries, so be careful in the removal process) and exposing the subfloor.
How do you replace a rotted plywood subfloor?
3:3911:54Replacing rotten subfloor - YouTubeYouTubeStart of suggested clipEnd of suggested clipIf you have an issue with the floor joist is rotted out at all and need to replace them there'sMoreIf you have an issue with the floor joist is rotted out at all and need to replace them there's actually a way to fix them without tearing them out and that's with the technique called sistering. You
How do you fix water damaged plywood?
3:476:04How to replace water damaged plywood subfloor; DIY NC Floor GuysYouTubeStart of suggested clipEnd of suggested clipSo that you can break the plywood down into smaller sections that makes it easier to tear. Out. ThenMoreSo that you can break the plywood down into smaller sections that makes it easier to tear. Out. Then you just use whatever tools you have on hand and some elbow grease and tear.
How do you dry a subfloor after water leak?
The first step is to absorb any water lurking on the surface of the floor. Then, place a dehumidifier at high settings to pull out any moisture that is still in the air. If the water leak is localized in one area, make sure to isolate that area by either closing the door or blocking off the doorway with a plastic tarp.
How do you replace a subfloor between joists?
4:387:43How to Remove and Replace a Rotten Subfloor - YouTubeYouTubeStart of suggested clipEnd of suggested clipWe want to attach each side of the plywood to the substructure of the house. We need to add boardsMoreWe want to attach each side of the plywood to the substructure of the house. We need to add boards in between the floor joists to screw the new subflooring.
How do you get moisture out of a subfloor?
0:041:10How to Remove Moisture From Plywood Flooring : Flooring TipsYouTubeStart of suggested clipEnd of suggested clipFor this job you will need plenty of space heaters or a salamander. Something that creates heat toMoreFor this job you will need plenty of space heaters or a salamander. Something that creates heat to pull that moisture up out of the floor. You also want to crack a window.
How do you replace a rotten bathroom subfloor?
How to Repair a Rotted Bathroom SubfloorRemove the Cabinets. Take out any cabinets sitting on top of the damaged flooring. ... Remove the Baseboards. ... Find the Nearest Joists. ... Remove the Fasteners. ... Cut Around the Flange. ... Inspect the Joists. ... Cover the Rotted Part. ... Take Your Measurements.More items...
How do you dry a subfloor after water leak?
The first step is to absorb any water lurking on the surface of the floor. Then, place a dehumidifier at high settings to pull out any moisture that is still in the air. If the water leak is localized in one area, make sure to isolate that area by either closing the door or blocking off the doorway with a plastic tarp.
How do you fix water damaged plywood?
3:476:04How to replace water damaged plywood subfloor; DIY NC Floor GuysYouTubeStart of suggested clipEnd of suggested clipSo that you can break the plywood down into smaller sections that makes it easier to tear. Out. ThenMoreSo that you can break the plywood down into smaller sections that makes it easier to tear. Out. Then you just use whatever tools you have on hand and some elbow grease and tear.
How do you replace a rotted plywood subfloor?
0:577:43How to Remove and Replace a Rotten Subfloor - YouTubeYouTubeStart of suggested clipEnd of suggested clipYou have particle board osb board untreated plywood or untreated tongue and groove plywood. BeforeMoreYou have particle board osb board untreated plywood or untreated tongue and groove plywood. Before we repair anything we need to figure out why this floor rotted in the first.
Can you remove subfloor with a circular saw?
Now there will be nothing in the way to prevent the subfloor from being completely removed. Just as you previously set your circular saw to the precise thickness of the drywall to avoid cutting any wires or pipes, you now need to set the saw height to the thickness of the subfloor. If the floor is so damaged that you can push out a section and examine the thickness, do so.
Can you remove floorboards under walls?
Removing Floorboards Under Walls. Now there will be nothing in the way to prevent the subfloor from being completely removed. Just as you previously set your circular saw to the precise thickness of the drywall to avoid cutting any wires or pipes, you now need to set the saw height to the thickness of the subfloor.
Is the top of a joist soft?
Then the top of the joists need to be looked at, likely they are soft too.
Can you remove subflooring from under tile?
There's no way you're going to be able to remove the subflooring from under the tile without disturbing it. Now if this is just a small area of the floor, it may be possible to remove the tiles without damaging them, cut out and replace the rotten subfloor, and then replace the tiles making it look okay.
Is the floor joist good?
The floor joist are good and one section of sub-floor was given more strength by placing treated plywood on top of it and "picture frame" framing it in. But - several other sections are so rotted that we can see bits of the tile in the kitchen above. I cannot afford to gut the whole kitchen and I do not want to crack the tile above.
Can you slide out a subfloor from underneath?
The only way possible would be if an isolation membrane like Dirta was used, it may be possible to slide out the subfloor from underneath, but it would be such a cumbersome job that the labor costs would probably run up above what all new tile would cost.
