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MDF wood working advice

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AceTKK:

With a monitor that big I would really consider a 2x4 frame to support it.  I wouldn't trust an MDF shelf to support that kind of weight over time.

-Ace-

dema:

Use drywall screws. They won't strip when you're screwing them in.

SpeedyR:

I"m surprised more folks don't use glue... I would use the screws but a good woodworking glue will help a lot with the overall stability of the setup. If you need it fixed that is... ;)

but you could use soemthing like Gorilla glue, and Titebond are all good.

Ed_McCarron:

RE:  Glue.

I tried using plain old Elmer's white glue on MDF... The surface was so smooth, that once the glue had set, the block I had glued on sheared right off - it seemed like the glue had no grip on the MDF.

It did leave a nice, clean spot where the glue was, tho. :)

Is there a better glue/way to prep the MDF for glueing?

Also, when sanding down my nicely filled screwholes, the MDF seemed to shred a bit - if it were real wood, I'd say the grain got raised.  Took a bit more work in paint to make it nice again.

Any thoughts?  I'm planning to go to all interior screws on the next few cabs I've got to build, which makes the glue/block question even more critical.

I guess the easy way would be to learn to tell my friends "no". :)

elvis:


--- Quote from: SpeedyR on August 18, 2005, 01:57:25 pm ---I"m surprised more folks don't use glue
--- End quote ---

All my cabinets are screwed and glued.  MDF doesn't have the 'pull apart' strength of natural timber fibres like pine or the hardwoods for just screwing alone.  You MUST use glue if you want your cabinet to last a couple of years, especially if it takes absue from friends and/or kids.

I use Selly's Aquadhere (available in every single hardware store and/or supermarket in Australia).  Cheap stuff, but it works a treat on porous timber materials.

That's for raw non-coated MDF of course (I always paint AFTER building).  If I was using pre-laminated stuff, I'd use something that will hold onto that a bit better.  But my carpentry is not good enough to use pre-laminated stuff.  I need plenty of putty for my cabs to cover all the oopsies. :)


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