I have some spare MDF Bullnose Shelving that are 39" combined. I need to build a 32" shelf in a closet space. I will use MDF cleats to support the shelf. Is it possible to combine these for building the closet shelf?

I don't have a biscuit tool. I have a handheld router (if that helps). I think I could use a support bracket in the middle (made with MDF), but I do not like this option because it would consume space that could be used for storage.

Please advise!

enter image description here

enter image description here

2 Answers 2


You'd need to add substantial rigidity and strength via dowels or other means of connection. It's not a material that tolerates bending stress well. The effort to do it properly probably isn't worth the cost of a new 6' or 8' shelf board.

If you were to precisely drill for say six 1/4" x 4" hardwood dowels and liberally apply wood glue to everything it would probably hold fairly well.

Otherwise you need to support it either with a bracket at the joint or lengthwise rails of some sort.


I would not bother to try to join MDF at all in a straight line as not the strongest material around, however if in a cupboard you could support the underside with a bracket and that would work well for you so not to waste your shelves.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.