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Oversize 3/4" mdf doors6/27
I have recently have jobs where the design calls for 3/4" painted MDF slab doors of pass door size and larger, hung on cabinet hinges. As this seems to be a trend, how are shops handling this? My stock is seldom straight when I get it, how in any way is a 3/4"x 24+"x 8 1/2' door going to work? Pointing this out has no effect.
My mdf stock, if warped, is always bowed, never twisted.
If I were going to build a slab door that size I would make sure to use the straightest sheets to cut them from and if any doors had a slight bow maybe use a latch or catch to pull it in if acceptable.
A 3/4 mdf door that size probably weighs 60 lbs or so, so I'd probably use at least 6 to 8 euro hinges if that's what they are calling for.
I see a lot of stock storage cabinets at the box stores that have large flush doors like that, but they're melamine which in my experience doesn't have the same tendency to bow like mdf sheets do.
Is banded melamine an option?
You can place the sheets out in the Sun for a half to full hour, with the crown toward the Sun, to straighten.
We've noticed the same thing. Other than saying we won't warranty large doors, and we'd lose the project because other shops will build it, we:
A) increase hinges
Thanks all for the replies.
We order thick door hinges. It is a pain for people to keep track of different hardware.
If I were to use the door straightening system, I would go with the 3/4" which would bend better if it needs to.
In regards to the lightweight MDF, we stopped using it, as we felt like the surface was "rippled" once paint was applied. That could just be our source, but we prefer the double refined MDF for painted doors. I did not notice that it was weaker, but you may have a point about the outside corners being easily damaged.