Composite ( glass ply ) hull Bouyancy tanks - pressure relief valves/ system ?

[lawqbarr]

Hi Guys

I am about to re glue the decks on to an early 1970s built 16 ' International Fireball dinghy I have restored

The boat is in good condition - composite construction - glass hull with wooden frames, ply bulkheads and decks

The cockpit bulkheads form 4 buoyancy tanks in the rear, sides and fore part of the hull -

Problem is this

How do I ensure the decks don't get split or forced off their frames by increasing air pressure as the air in the buoyancy tanks expands on a hot day ?? I have seen that happen before on other boats but strangely can't find anything on line where this issue is discussed and solutions are suggested

Would a very small diameter hole in, say, the inspection port covers, provide enough pressure relief without running the risk of water flooding into to the hull tanks when the boat goes over/ bottles ?

Over to you, the Brains Trust

TIA

David

[mboat]

Pretty common to do as you have suggested.

My sabot (a long time ago) had a very small hole drilled in the centre of the ports for this reason as did other boats I owned.