Fastening headlining in place with wood strips and screws ......

[CPD]

,,,, in a Beneteau First 345 of late 80's vintage.

I know that this is not necessarily a long term solution, and that full replacement is the best way, or attaching batons and then attaching foam covered board etc.

BUT .............

For the moment, what length screws would be appropriate. Another way of asking the question, is what thickness do you believe the GRP might be ?. I would rather not drill a hole through to find out ........

Many thanks.

 

[Deleted member 36384]

I don't know about your boat. On my Rival, which is heavily built, I have used No 6 M13 (13 mm long) and they broke through by about 3mm over thickness (the flange was 1mm thick). I would suggest that you will have 10 mm thick GRP to play with on your coach roof, so a No4 M6 screw should allow enough grip without poking through. The 6mm is the length of the screw from the underside of the head. Hope this helps.

best of luck,

BlowingOldBoots

 

[pagoda]

,,,, in a Beneteau First 345 of late 80's vintage.

I know that this is not necessarily a long term solution, and that full replacement is the best way, or attaching batons and then attaching foam covered board etc.

BUT .............

For the moment, what length screws would be appropriate. Another way of asking the question, is what thickness do you believe the GRP might be ?. I would rather not drill a hole through to find out ........

Many thanks.

There are a few places on our boat where small screws go into the deck above, but when I fitted battens I did not want to do any damage. I went for battens about 12mm thick, and simply glued them to the roof with thickened epoxy. Instead of trying to glue the whole length, I went for several short battens about 250mm long , in the line I wanted . You don't need to put in all that many screws anyway.
I was than able to use screws about 12mm long to attach the boards (either 4mm or 6mm thick), without any risk of breaking through.
I'd guess the deck is maybe 10-12mm thick including the gelcoat?

Put some closed cell foam under the deck before you re-mount the panels... it makes a pleasant difference!
I don't see why it can't be a long term solution. Sticking conventional foam backed material directly on the roof is maybe OK in the Med , but not a good choice for our cool/moist weather..
Graeme

 

[Searush]

I found I was able to clip many of my battens in place over the curtain rail without screws. Where I did need screws I used 1/4" brass countersunk & they just bite into the inner GRP skin.

Temporary solution, yeah, mine has lasted 15 years so far - longer than the full replacement done by the previous owner & still looks fine. It also cost a tiny fraction of the cost of new lining & took an afternoon's easy fiddling to do.

 

[Graham_Wright]

I found I was able to clip many of my battens in place over the curtain rail without screws. Where I did need screws I used 1/4" brass countersunk & they just bite into the inner GRP skin.

Thanks for the inspiration. It is a lot easier and probably more elegant than the way I was intending to go (for and aft strips).

 

[FullCircle]

Stuff using screws. Put the batons up with Wet Grab. That is how mine are held up on my Jeanneau (although I suspect they used v expensive Sikaflex).


http://www.bostik.co.uk/diy/product/evo-stik/Serious-Stuff-Wet-Grab/25


Screw the headlinings to the batons!

 

[prv]

Stuff using screws. Put the batons up with Wet Grab.

I think the OP is trying to hold up a sagging one-piece vinyl headliner by screwing battens below it into the deckhead above it. Glueing the battens to the headliner won't hold it up; if anything they'll drag it down!

For what it's worth, my deck is two thin skins of GRP with about 20mm of foam in between. So a screw with 10mm of penetration will go through the inner skin and grip nicely, with no danger of puncturing the outer one. If your deck is solid rather than cored, 10mm sounds rather thick to me.

Pete

 

[rob2]

Agreed, it seems that the battens are intended to hold spring the headlining into place - but both methods are relevant! The best system would use both techniques, a batten above the ling to take the screws and a "trim" batten below to press the lining back up.

Rob.

 

[timmygobang]

Stuff using screws. Put the batons up with Wet Grab. That is how mine are held up on my Jeanneau (although I suspect they used v expensive Sikaflex).


http://www.bostik.co.uk/diy/product/evo-stik/Serious-Stuff-Wet-Grab/25


Screw the headlinings to the batons!

This is what the previous owner has done. Great until you want to remove the headlining to install new light fittings...

I was going to remove all the panels and fibre glass in a series of batons at some point.