Andaura

this would involve having to replace the whole floor and all the sleepers and then putting 2x2 sleepers over top of the vents and into the wall correct?

are there any ways to fix this without changing the floor level?

nealtw

have a look at this perferated angle iron, you could screw it to the wall.

Andaura

so to use the perferated angle iron, I would attach it to a sleeper and then run it over the vents and screw it into the wall stud? That would support the floor?

--EDIT--
now that i go in there and look at it...do i just put the iron flat against the wall and the flooring just sits on it??

nealtw

Yes now you have it, You will want to use constuction glue and screws when you put down the plywood. The lumber yard will help you with that, You will need a cheap glue gun and tubes of glue. Just glue between plywood and iron. Home Hardware in Kamloops should have the angle iron in stock.