What's the best way to hang a gallery wall on hard concrete walls?

Are you renting the loft. If so your answer is going to be determined by your landloed whether he will let you put anchors in the wall for your heavy objects. If he won't you will need to build some kind of wood support structure that's decorative and can support the heavy weight pieces. Those 3m removable strips for hanging pictures won't hold any substantial weight

There are wall hooks made for concrete or cinderblock walls. They are often plastic with four little pins in a round flat part. You hammer the pins into the concrete, which is easier than it sounds. Those should work for anything you can't hang with heavy duty command hooks.

We used a hammer drill with a masonry bit and concrete anchors. If it's softer concrete, you might get away with using a regular drill.

Forget 3M Command hooks.....guaranteed to fall off within six weeks. Do not waste your money?

I would use the hook you just stick on the wall ...no nails. So you can change the arrangement ...if needed.....without nail holes.

Opppsssee Yvonne said 3M doesn't work......make sure you clean the wall really good before using 3M

I agree if renting ,you need the landlords permission to drill into the wall. I would build a decorative wall with wood and fasten to the concrete wall. If constructed correctly it will hold anything you hang.

why not use a ladder style to hang your picture, boards with what would look like rungs in between, it can rest on the wall and you pictures can be attached to the rungs. I can see it in my mind but I have a hard time explaining it.

I've thought about hanging a strip of wood with pegs. I need to ask my new landlord about drilling into the walls