If only a few joists are rotted primarily at the bottom they can be repaired using a process known as sistering after the rot is cleaned away and the timber treated to prevent more problems a new joist is laid beside the old one and fastened to it.
Do you replce floor joist after flooding.
However equipped with a dehumidifier and some fans it is easier than you think.
The key is to isolate the area to use the dehumidifier followed by circulating air using the fans.
Use a pry bar to remove any protruding nails and vacuum up the demolition debris.
Cost to sister or replace floor joists.
Replacing the subfloor more extensive water damage often requires replacing the subflooring and sometimes the framing and other affected materials too.
Average costs and comments from costhelper s team of professional journalists and community of users.
Tack a beam under the sagging joists.
Find a new floor joist with these exact same dimensions.
If the subfloor is spongy or there are any signs of mold or rot you ll have to expose the subfloor and related elements beyond the area of damage.
If you find mold in any materials take care of it before continuing with your subfloor work.
If you hire a pro it may be expensive.
However before you do this it is important that you take note of their location.
Joists will usually be 16 inches apart but there are also some cases in which they will be 24 inches apart instead.
Workmanship must be good but it s possible for a do it yourselfer.
Set a hydraulic jack and post under the beam and jack up the joists about 1 8 in.
Now that the joists you want to replace are visible it is time to remove them.
Find a replacement joist that is the same size as your floor joist.
This step strengthens joists affected by water.
How much repairing floor joists should cost.
Step 3 remove the old joists.
Use a circular saw set to 1 depth to cut the subflooring back beyond the damaged areas until you reach solid structural framing.
Select a joist and select an end.
Keep this process going until moisture is gone.
In this case you ll probably pay only 100 to 300 for each joist repair.
If the remaining solid wood is wet ventilate the area and allow it time to thoroughly dry before installing replacement materials.
You can side the joists with 2 inch by 6 inch boards or span spaces with lumber blocking.
Nailing two 2x4s together will work to span about three joists unless the sag is under a weight bearing wall.
That is hard to do if the floor isn t at least three feet off the ground.
Drying subfloor after flood damage can seem like a daunting task.
The exception to this happens in unfinished basements where the joists are visible.
Joist repairs mean you ll have to tear up your top layer and the subfloor and replacing them.
Then set new joists same height as existing ones alongside the old.
This method provides easy access to remedy a water leak and foster drying after a flood by cutting out sections then taping them back in place after drying.
If your floor joist is an i joist for example buy an i joist.
Use a tape measure to measure the length width and height of your existing floor joist.
