Plywood Deck - bottom side

[adelmo]

Newb and 1st Post: Preparing to install new exterior grade plywood deck on my Starcraft. Plan is 5/8" ACX/BCX Spar Varnish and finish w marine vinyl. Should I spar just top and sides and leave bottom bare for plywood to breathe? Thanks and look forward to feedback.

 

[lckstckn2smknbrls]

Seal it all.

 

[Kismet]

I'm thinking it is going to "breathe" moisture.

I'd do it all; the idea is to seal the wood.

 

[surfman]

It will rot if you don't seal it to keep the water out!

 

[tonynoriega]

I did all of mine, top bottom, and especially the edges...

The edges of mine got two times the coats as I did them each time I did top and bottom...

 

[adelmo]

Thanks makes sense!

 

[kofkorn]

Adelmo,

Definitely seal it. Here's a picture of what the bottom side of mine looked like after about a year and a half when the prior owner left it unsealed:


Do it right the first time and you won't have to do it again.

Good luck!

 

[bobberboy]

tonynoriega » Today, 11:14[/url]"]I did all of mine, top bottom, and especially the edges...

The edges of mine got two times the coats as I did them each time I did top and bottom...

X2

 

[MrSimon]

If possible, drill your holes BEFORE sealing it.

 

[surfman]

MrSimon » Today, 07:20[/url]"]If possible, drill your holes BEFORE sealing it.

^^^
Dry fit the floor first then remove it after you have all the holes drilled and fitted and then seal it up!.

 

[adelmo]

Thanks for great info especially sealing rivet holes.