Not all floor problems are the same.
Fethering a sagging floor.
Sloping floors verses sagging floors.
There are several problems that can cause a sagging or sloping floor which is one of the reasons why fixing a sloping floor is difficult.
Depending upon the conditions it is possible to strengthen or repair existing framing members such as floor joists or roof rafters by adding reinforcing material sandwiching the member on either side with plywood is sometimes worthwhile but the plywood must be installed correctly for greatest strength.
The cause of these may be the same or may be different.
These terms are related and a sagging floor actually has a slope from each side of the sag.
On average nationwide repairing a sagging floor costs between 1 000 and 10 000.
One category describes floors that have a general overall slant.
Thre ways to fix a sagging or sloping floor.
The average hourly cost for floor repairs is between 75 and 125 for the labor alone.
The other category describes floors that might generally be level from end to end but within that span may have sags or dips.
Foundation issues deteriorating wood supports especially sills which rest on the foundation footer improperly installed joists or sub floors and other issues can all cause a floor to slope or sag.
Some are serious structural issues that require the attention of a contractor while others are more routine cosmetic problems that you can solve yourself if you re a fairly advanced do it yourselfer.