Bench seat – foam thickness.
One of the jobs I want to do on my RIB this year is to tidy up the bench seat arrangement, and possibly cut down on the shear bulk of the base and backrest.
The current base and backrest arrangement is 1/2in thick ply well coated in preservative and 4in thick upholstery foam covered in Grey vinyl secured with stainless steel staples.
I made these @ 10yrs ago now and they are still fine, but actually quite heavy and bulky even though they are dry inside and not full of water.
I’m thinking of making both parts a few inches shorter, using a plastic board and thinner waterproof Closed cell foam.
Bearing in mind the functional nature of ‘The Nashers Revenge’, and my distain for White cushions with Blue piping, I might not even cover the foam at all. I’ll also make the whole thing fold away.
I understand 30mm of the Closed cell high density foam is probably going to weigh the same, if not more, than the current 4in of Upholstery foam, and also that it’s going to be expensive compared to normal or ‘Chipped’ foam. I also understand that it’s not recommended for household upholstery as it’s not Fire retardant.
But if nothing else should make some interesting noises when being sat on in wet wetsuits.
Has anyone any experience of this type of foam and can suggest what thickness would give enough comfort to passengers rear ends?
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