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Old 10-04-2011, 08:26 PM   #1
speeddemon11L
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Default Coffin Keezer Lid Construction

I am building a coffin keezer with a tower mounted to the lid. I plan on laying tile on top of a plywood base. My question for those that have gone this route is:

Was 1/2" plywood sturdy enough or did you use 3/4"? I would normally just go with the 3/4" to be sure, but I'm getting concerned about the overall weight of plywood, trim, tile, tower, etc...

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Old 10-04-2011, 08:31 PM   #2
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1/2" was fine in mine. Most of the base and tile are being supported by the lid itself under the plywood, and only the part that overhangs the edges is unsupported. Also, the edge trim provided a ton of rigidity to the overhang.

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Old 10-05-2011, 03:40 PM   #3
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I used 3/4" plywood and then 1/4" hardi-backer board (cement board) mortared and screwed down to the plywood, just like you would do on a sub-floor in your home. Probably overkill, but I will never have to worry about grout lines or tiles cracking. Keep in mind that the tops on most coffin keezers are very heavy, especially when tiled. When you walk on the subfloor of your home, there is flex in the plywood, so for home tiling applications, mortaring down cement board and screwing every 6 to 8 inches in the face of the board gives the added stiffness of the subfloor to prevent flexing and subsequent tile/grout line cracking. The top of my keezer weighs a ton and if I didn't use plywood with a hardi-board foundation to tile onto, I would run the risk of cracking when lifting the front of the lid due to flex. I probably could have gotten away with 1/2" plywood and 1/4" hardi-board, but I would not consider going without hardi-board or cement board for this application IMHO. For the extra $10, mortar and screw down some hardi-board (sold at HD/Lowes in 3' x 5' sheets) and you should never have to worry about cracking. Good luck!

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Old 10-05-2011, 07:15 PM   #4
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I have 5/8" (well really 19/32") on mine. No issues here.

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Old 10-05-2011, 08:00 PM   #5
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Mine is 19/32 too, and I will be using 1/4 backer board too. Cant comment on issues yet since I am still in the building stage myself. Hopefully after this weekend I can comment more.

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