Arborite island top

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taz5908
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Joined: Sat Feb 02, 2019 1:27 pm

Arborite island top

Post by taz5908 » Sat Feb 02, 2019 1:37 pm

We have an arborite island top that has bowed over time while in storage (has never been installed). The bow seems quite significant (bowed up approx 1/2" on each side edge). Is it possible to flatten it out again? If so what is the best method to do this? Thanks!

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A. Spruce
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Re: Arborite island top

Post by A. Spruce » Sat Feb 02, 2019 2:46 pm

That looks to be a Formica-like product, which means it's probably glued to a particle board foundation. Even brand new, these countertops tend to be warped/bowed. I've never had a problem pulling these non-flat surfaces down to the cabinet tops with screws through predrilled holes. You will need a helper to put weight over the point where the screw is being installed, once the screw is pulled tight the counter should stay put.

For bows that are front to back, if you double up the number of screws at each point you will significantly increase your holding power while decreasing the tension stress at any single fastener point. That is to say, if you pull the bow out and only use one screw at each point, the resistance of the bowed material exerts a great point load on the fastener, since particle board, assuming this is the substrate, isn't a structural component, the threads can pull out relatively easy. By putting two screws at each fastener point a couple inches apart, you get twice the holding power and spread the load over a much larger area of the substrate, thereby lessening the chance of failure.

Same goes for the more fastener points you put along the length of the bow. Example, your counter is 10 feet long, if you simply put one screw at each end, that is a lot of force for those two points to hold. but if you were to put 5 or 6 screws along the length of the bow, each screw is holding the bow flat.
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Shannon
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Re: Arborite island top

Post by Shannon » Sat Feb 02, 2019 2:49 pm

Sometimes even just letting them sit flat for a while will straighten them out as well. If they are stored standing up or leaning they will warp.
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