please help for rotten wood

i have an old sailboat which is epoxyglassed from outside.
i am checking the wood from inside and i have found a badly rotten part where planks meet the sternpost. i clean as much as possible the rotten wood but i dont want to dig it too much and dent the hull and sink the boat!

first i want to dry the wood as much as possible and repair it with epoxy. but before applying epoxy, do you know any material that i can apply to the rotten and softened wood before i apply epoxy?

Regards
Ulas

 

No.

Rotten is useless for strength.
You need to remove the rotten wood and replace.
The rot probably goes farther than you think.

You can try to use filled epoxy, but you are just asking for a different way to sink the boat.

 

I agree. Gluing epoxy to rot is not a structural repair. You need to cut and remove until you get to good wood. Then make the repair.

 

Rot is treated just like cancer. In fact, it's commonly referred to as wood cancer. The cure is to remove the cancer (rot) completely. Basically you cut out the rot, which will be much more extensive than what you see on the surface, then scab in a replacement piece. This likely means you'll have to put the boat on the hard and let her dry out a few months, so the moisture content will be low enough for epoxy to be effective as a glue.

 

absolutely agree with the rest. Must get rid of the rot. Rotten wood spreads. If you try to encase it, you will be creating a moisture trap and the rot will continue to spread through the timbers.

Cut out the rotten wood completely. Then find the source of the leak/moisture and remedy that before putting in new wood. Then replace the wood you removed and join it well to existing wood.

 

I have found that mix up some oxalic acid wood bleach and put it into a spray bottle and spray the wood soaking it will kill the rot fungus.
Another solution is mix 90% rubbing alcohol with Borax Roach powder killer ( a white powder) and spray or paint it on.

Still you need to replace wood with good wood., but treat the wood after you dig out rotten wood will help you maintain the wood rot from spreading.

Areas I have repaired cutting back to sound wood and treating, then gluing in new wood, the rot has not returned. Been 4 years on some areas and no rot yet come back.

Other smaller rot areas, I dug out to sound wood, treated wood. Then mixed up PL Premium polyurethane construction adhesive with wood sawdust and patched have also remained rot free.