Coach roof vents.

[Clint]

I have 2 problems with my little Winklebrig, somewhere along the production line, (or aftermarket) coachroof vents were added, wooden spacers were put onto the roof to make it possible for the vents to flush mount on the curved roof. I have had to remove the wood, and the vents, because they were cracked and damaged beyond repair. I am now left with 2 gaping holes in the roof, I would like to refit vents, but without having to remould, or form new wood, is there any vent that is more concave in shape than flush mounting? Any help or ideas are most welcome.

Thanks

Clint

 

[Wooden Boat Fittings]

I think you're probably going to have to bite the bullet and make up a curved base for whatever fitting you use.

If you settled on a mushroom vent like this one (which has a narrow flange), you could try laying it out first in the appropriate place and seeing if bedding it straight on dolfinite or some such was an option, then make up curved base if not. You'd need to be sure that whatever fitting you got, if you were trying it out like this first, was one you'd be happy to have in any case.

Assuming you're in the UK Davey has mushroom vents but you would need to make sure that the one you got had a high side-wall under the cap, as they have them with both high and low walls.

Mike

 

[Clint]

Thanks for the advice, I have just measured the gap I would have to fill about 8mm, that's using the old 200 mm wide vent base as a guide. I can't seem to find any UK suppliers of Dolfinite, would good old sikaflex 291i or 221 do the job?

Clint

 

[Tranona]

Suggest you build up a flat base using thickened and pigmented epoxy. You should be able to find details of the technique on the Wessex resins site, or it is in the West book on boat construction. Very commonly used technique in custom boat building for mounting deck gear such as winches on cambered surfaces.