ok so i have my dimensions already out and my boards cut
now i just have a bunch of pieces of wood laying around
i was wondering how i get them together, i know of liquid nails but dont i have to use glue or something to help it be more sealed?
step by step instructions preffered or something
thanks guys

 

I usually use sealing adhesive from home depot and screws...

 

Liquid Nails is glue. I like to use Carpenters Glue. Any good wood glue should do. Use 1.5" wood screws to hold the joints in place while the glue dries. Space the screws about 5-6" apart and stay away from the end to avoid splitting. Also be sure to drill pilot holes for your screws, again to avoid splitting the MDF.

 

As well, a nice bead of silicone on the inside seams is a good. Avoids letting air seep out.