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The way you have outlined your repair does not sound viable as it will not  have the strength to support weight.  I do not think that the remaining sound plywood/foam sandwich would  have sufficient inherent strength to anchor your repair.

To answer your question the idea is not good.

Regards

Dug

Quote: Originally posted by Al+Mel on 14/9/2011

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If you repair the area by framing it with battens that are screwed and glued with epoxy, then replace the top skin using epoxy the repair will probably be stronger than it ever was in the first place.

Epoxy will not attack the foam, and has a high level of strength in its own right, so it is the perfect stuff to use.

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This sounds a good idea , i would follow this advice .

atb

Wizard

Quote: Originally posted by Al+Mel on 14/9/2011

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If you repair the area by framing it with battens that are screwed and glued with epoxy, then replace the top skin using epoxy the repair will probably be stronger than it ever was in the first place.

Epoxy will not attack the foam, and has a high level of strength in its own right, so it is the perfect stuff to use.

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This is exactly how I planned. Thanks very much. What sort of epoxy do you recommend and where from. Screwfix?

Jake

Have a look at these , they should do the job . Click_here

atb

Wizard

One last question (I promise!), the wood appears to be around 6mm thick, does this sound about right? Any known good place to by it from, or just search b&q etc?

Thanks a lot guys.

Jake

6mm sounds about right , B & Q should do you , try to buy good quality plywood . The epoxy is what's going to give you the solid floor .

atb

Wizard

Hi All,

Repair going well, but it appears the expanding foam bodge has created a real dip in the polystere floor. Is there anywhere I can get a new sheet of polysterene from?

Cheers,

J

Have a look Here ( this link was posted by another UKcampsite member recently ) .

atb

Wizard