/diy/ - Do It Yourself

>>1261068
>>1261076
>>1261078
It's stupid question thread you cock dumpsters, not stupid answers. Get the fuck out of here.

>>1261066
Mark out a few areas to test with a rectangle with masking tape at the size you want to work in. Buy a length of aluminium extrusion (guaranteed to be straight, as opposed to a piece of timber or something) as long as the longest side of the marked rectangle. 2400mm is a standard length close to your size, maybe mark some 2400x2400 squares?

Start at corner A, lay the extrusion along a side of the area, and sweep it 90 degrees across. Observe the high/low points as you go, maybe mark them with chalk as you find them (I use X for high, O for low, sizes approximate to the deviation) Place the extrusion at the opposite corner to corner A along the opposite line you started on, sweep again, and mark again. Repeat until you find an area with the least deviation. Little fiddly, but it has worked for me more than once at various locations for finding level floors for machinery etc. Good luck.