Filling in an old vent opening in the deckhead

The hole was quiet a sizable hole which needed removing, so in order to do this a piece of Perspex was fitted to the underside of the hole to use as a plate to which the fibreglass could be glassed on to. So three layers of wetted out fibreglass was laid up on the Perspex and then fixed to the deckhead with a couple of small self tapping screws while the fibreglass cured. 

This is the plate fixed in position and being waxed the fibreglass will be able to be released from the panel once the fibreglass is cured.

because the underside of the hole as been ground into a slope on the inside of the deckhead the fibreglass will be flush with rest of the deckhead.

Once the inside of the deck head in cured then the upper part will have a slope ground on to as well and then more layers of fibreglass will be laid up on this side and then finally gelcoat over the whole area to be the same level as rg rest of deck and the two fixings holw will have fibreglass over the inside and then gelcoat on the holes on the deck.