Building a wooden pond

[Joshaeus]

OK! So...cover the plywood with some sort of sealant to improve its lifespan?

 

[sissy]

mine was on the inside because the people wanted it water tight and did not want a bulky liner in it .But I did seal the outside with marine varnish

 

[Joshaeus]

I'm planning on using a liner anyway, but I will find an attractive marine varnish and waterproof the outside with that. Do I have to varnish only the outermost plywood or all the 2 by 6's and both layers of plywood?

 

[Joshaeus]

Here's a side diagram of the water garden, assuming I go the 6 foot by 16 inch by 16 inch route. The orange is plywood, the brown is 2 by 6's, and the maroon is the lid. The blue is just empty space. The scale is 10 pixels equals 1 inch;

 

[sissy]

the side ones if pressure treated will not need it .But get a moisture meter for wood because if it is not dry it will peel ,any moisture meter for wood will do

 

[Joshaeus]

Will do.