Originally Posted by mercury7
I apologize if this has been answered elsewhere, I have two spots that ended up being less than a sqaurefoot of floor that I want to replace, what is the best precedure to do this....it is right next to the wall and so there will be no frame support to attach it too.....I have one bigger area that I am going to cut out to the frames but the two smaller ones I did not want to do that.
thanks in advance. I already purchased some pressure treated plywood for the job.
Hi mercury7; You must cut out a small inspection hole in the bad spot first.
Make sure that you will not cut through wires, plumbing or gas lines as the saw blade may protrude too far into the belly. Hole should be large enough to put your arm in so that you may check underside for things being in a way. Once satisfied that is all clear lay out your cut out lines. Try to stay away with cuts closer than two inches away from frame or cross members. The reason for it is, that you will need to frame the cut out area from underside, in order to support a replacement plywood. Cut four inches wide strips of plywood of a proper length, so that you have a support for the replacement piece. Fit and clamp frame pieces in place so that two inches in width of the strips protrude to the inside of your cut out, and the other two inches will be hidden under the floor. Pre drill holes through the floor about one inch from edges of cut out. Remove one piece at the time after pre drilling and apply Gorilla glue to the two inch wide area that will be hidden under old floor and fasten with wood screws in pre drilled holes. Repeat the process with remaining pieces. Word of caution [wear rubber gloves or the glue will have to wear off from your hands, no known cleaner available]. Fit the new piece in by gluing it in and fastening it with screws. Small areas of rot can be repaired by using GIT ROT. As you probably realized, that if you stay two inches away from frames, it will allow you to glue in supports for the replacement piece. The glue will expand and ouze out. Wait with clean up of the glue until after it sets, which you can sand down to level surface. If the piece of replacement plywood must go to the wall, you may have to resort to three pieces of strips and may have to insert the end of replacement between the aluminum channel and the angle through which it may be bolted.
Good luck with the project, "Boatdoc"