Water damage self repair?

You have to be careful trying to just piece in patchwork. Everything inside was installed after the floor was built, so the floor sheeting is in one piece across the entire width of the unit. This is needed for strength. To repair it properly, all the stuff in the way needs to come out first.

In answer to your question, yes, this can be done as a DIY. It is essential to have a closed place to do this, a shop, barn or something similar.

To get an idea of what is involved taking a trailer apart, have a look at my Rebuild Project.

There are different construction methods amongst the various brands. Check to see what yours is.
Mine was 2X2 wood stud framing, 2X3 floor joists. The aluminum siding was stapled directly to the studs, no sheeting because that adds a lot of weight. The interior was 1/8" wood paneling.

t-smith wrote:

So is it a DIY capable? I’m very handy and do most home and car repairs but haven’t done a TT before.

I’m assuming remove linoleum, cut out bad floor. Cut out sections of wall. Let dry.

The real problem is the floor. The water could have traveled a long way damaging the plywood. All walls and cabinets are built directly on top of the floor and attached to it. You might have to disassemble more than you think.

t-smith wrote:

Replace insulation. New floor and glue back down linoleum. What about the wall? What material for that?

This depends on the manufacturer and model. Typical wall are 2x2 studs. If it has aluminum siding the exterior sheathing is probably 1/4" plywood. Interior is usually luan plywood. Nothing really tricky.

Some models use aluminum studs and Azdel sheathing. Azdel should not rot, but the Filon flexible skin can delaminate.

This is a big job. The average DIYer could spends months working nights and weekends.

It's not bad, you may need some specialized trims and sealants, but everything is available on the web if you look. Here's a link to the slide out floor replacement in our Terry TT, there's a link in my signature to the Lance truck camper rebuild we did.

Forum member JBarca rebuilt an entire Sunline travel trailer, top to bottom due to multiple leaks. John is a great guy but even you are a fast reader, there is hours of reading here with hundreds of pictures.

If you have a place to work and keep the exposed part of the trailer dry, you won't have any problems. I'm handy like you and like anything else new, you take your time, it's nothing complicated. PM me if I can help.

You’ll need to “cut out” until the damage stops. With sufficient time, a DIY repair is possible. Lastly, nothing hidden is nice.