Best way to mount bunk boards

[-JR-]

Going to unload the boat at the lake so I can replace one rotten bunk board.
Will have it wrapped and ready to install. But what's the best bolt on method
Just lag bolts screws in from the under side , Or
Nut and stove top bolt going thew the complete board .
Doing the bolt&nut through method , I have to be right on in the spacing before covering with carpet . And having a hole threw the board will allow water into the wood ,but using a lock nut it should never come lose.
First method is the easiest just place covered boards on trailer and screw in some 3/8 inch lag bolts from the bottom side with some silicone
But will the lag bolts come lose always.
What is the bast method ?

 

[JessicaKK]

I’d probably go with the through bolts. It’s a little more work, but I’d feel better knowing they’re not going anywhere. Just seal the holes really well before putting the carpet on.

 

[airshot]

I vote for the thru bolts as well. I also do not add carpet to the underside so water can come out of the wood and slow down decay. With no carpet on the bottom the wood can breathe. I also use nyloc nuts so they don't vibrate loose. Use stove bolts to prevent any gouging or wearing thru the carpet from the bolt head.

 

[JessicaKK]

I vote for the thru bolts as well. I also do not add carpet to the underside so water can come out of the wood and slow down decay. With no carpet on the bottom the wood can breathe. I also use nyloc nuts so they don't vibrate loose. Use stove bolts to prevent any gouging or wearing thru the carpet from the bolt head.

That makes sense. I especially like the idea of leaving the bottom open so the wood can dry out. I hadn’t thought about using stove bolts to protect the carpet either. Thanks for the tip!

 

[Scott Danforth]

countersink carriage bolts, then backfill the countersink area with caulk

 

[redneck joe]

for bunks, i like bunk slicks no carpet. you loose the 'stickiness' of the bunks some people like.