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23/07/03 14:51:33Login ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 1[2]3456789 ]
Subject: Re: Cockpit Locker Lids

brian henry
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Date Posted: 7/03/06 8:57:28
In reply to: Peter Burton 's message, "Re: Cockpit Locker Lids" on 7/03/06 0:22:21

Peter, I am sure your decision is a logical one and will produce something similar to the original construction – at least at the time my T500 was built in 1980, which was with a teak-faced marine ply (edged with rubber strip where it met the frame). It will certainly be a cheaper and easier construction than the route I chose.

Some caveats do come to mind.
You should source teak faced plywood to match the frame and other wood in the cockpit. Where I live I had no practicable access to that, which did influence my own decision how to approach this project.

The rebate in the teak frame where the plywood will seat will limit the thickness of the plywood to approximately 10mm (check precisely before you order) - it may not exceed it or it will expose the end grain above the level of the frame. This means that there will be limited thickness to sink your screws and cover the heads with an adequate depth of teak dowel, if the strength of the laminations left in the area of the screws is to be sufficient.

Gary solved this by gluing the plywood to the frame, which meant he could sink the screws to a minimal level where they were not so necessary for the intrinsic structural strength. I believe this could be problematic in the longer term when weathering will cause the glue join to separate due to different behaviour of the solid wood to the plywood. Unless you have a substantial cockpit cover when unattended the effect of constant exposure to sun and rain is punishing on glued, wooden, flat surfaces.

It may therefore be advantageous to cover the whole lid surface with an impervious material such as your original trackmark, even if it does seem a pity to cover what will be an attractive wooden finish. But then again, why bother? If you get another 25 years out of the renovation, it probably doesn’t matter.

You will be tempted to varnish everything. Don’t, it will quickly break down and you will be left with discoloured wood that is difficult to restore. Use teak oil, even on the plywood. I have constantly made this mistake and regretted it. ‘It seemed a good idea at the time’ and I always thought I could keep up with the maintenance but later I have always seen it wasn’t such a good idea.

Good luck with the project.

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Subject Author Date
Re: Cockpit Locker Lidsbrian henry 7/03/06 15:11:35
    Re: Cockpit Locker LidsPeter Burton21/03/06 17:54:16

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