Mount umbrella stand to composite decking

Old 09-21-14, 11:38 AM
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Mount umbrella stand to composite decking


I just bought a house with a composite deck, and I would like to put a large offset/cantilevered umbrella out there. One umbrella I'm considering comes with a huge base, that you fill with 200 lbs of sand. I'd rather mount the stand to the deck using something like this: I don't know much about composite decking, and I'm afraid that simply screwing/bolting this stand into my deck will not be strong enough. Does anyone have any information on whether I'm right or worried about nothing?

Old 09-21-14, 08:02 PM
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Most composite decking is notoriously soft, since it has lots of plastic in it. And when it gets warm, and/or the steel umbrella bracket heats up, it will get softer yet. A preferable solution might be to mount the bracket on a square, heavy wood member (short 2 x 10 or larger), using counter-bored through-bolts for a flush fit on the bottom. Then mount the wood to the deck by locating its 4 corner holes such that they align with gaps in the deck planks, as it would be a big mistake to drill holes in composite decking. Install a duplicate wood member (having a matching hole pattern) on the underside of the deck, such that your 4 attachment bolts squeeze the composite as they're tightened. Some stain or paint on the wood will help extend its life.

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