Just got all me wood delivered this morning ready for sundays build of a new iguana viv, Just wondering if anyone knows what sort and size screws are best used? Mdf is 18mm thick, also what size pilot holes etc... Thanks for your time,
Chris.

not really sure, I built a 2',1',1' viv out of old veneered chipboard I had lying round for a quick fix to a problem, I used wood screws that had about 15mm of screw after top piece. Just drilled hole big enough for screw to fit through then screwed it in the rest. Result; not professional but safe as houses. Don't know how to upload pic to show you.Hope dis helps.

I use 15MM mdf. I used size 6 1.25" chipboard screws. I used 2 sizes of drill bits for the pilot holes. The bit was a bit smaller than the screw shank for the top bit (size 4 I think) and very small (size 2) for the rest. Also used a countersink so the head went in nicely.
You will probably need to go a bit bigger for 18MM. I guess iguanas are quite rough with their vivs?

__________________
Snickers
Snakes - Carpet Pythons1.1 Bredl's Python (Neville/Luna)1.1 Jungle X Carpet Python (Molly/Arthur)0.1 Diamond X Carpet Python (Aurora)
Inverts - Tarantulas0.0.1 B. bohemi - Mexican Fireleg (George)0.0.1 B. emilia - Mexican Red Leg (Ginny)0.0.1 B. smithi - Mexican Red Knee (Fred)0.0.1 B. vagans - Mexican Red Rump (Charlie)0.0.1 C. fimbriata - Indian Chevron (Snape)0.0.1 C. cyaneopubescens - GBB (Mosag)0.0.1 E. sp. "blue femur"0.1.0 G. rosea - Chile Rose (Aragog)0.0.1 L. parahybana - Salmon Pink Birdeater (Hagrid)

4mm drill for any through holes and a 2mm or 3mm for pilot holes.
4mm screws are fine x 60mm or 80mm.