The thing about folding tables is, the tops–which are commonly made of cheap particle board–tend to wear out much faster than the legs–which are usually made of steel. So the world is full of old folding tables with mutilated tops and perfectly serviceable legs. Here’s a cheap and easy way to replace that old top using a hollow-core door, including a clever trick for reinforcing the mountings with spray-in foam.
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I wish I could say for certain that blowing in the foam makes a difference in the durability of the finished product. Without a control, however, I'm just speculating. I can say, for certain, that the foamed-in anchors feel more solid than the anchors without foam. Tap on the door where it's without foam and it goes bong, whereas if it's been foamed it just goes thud.
The foam makes a bit of a mess, however, and if too vigorously applied can cause the surface of the door to bow out annoyingly. So whether or not it's really worth doing is still an open question in my mind.
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