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Breeze blocks for garage flooring	206 views
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TCarper

Posts: 4620

#9 9 Aug 2026 at 1.55pm

In reply to Post #8
No worries David.

That base you see has a lot of weight on it these days. Absolutely solid as a rock. Both we have done have been the same.

If the garage floor is permanently damp, just lay a bit of damp course membrane under the slabs first. On a level floor it will be so easy if there is no rocking on the slabs.

I was a plasterer before what I do now. We were always damp proofing basements that were ringing with water & soaking wet permanently. What you will do with those slabs will totally solve your problem on a wet floor.

0nslow

Posts: 1570

#8 7 Aug 2026 at 6.24pm

In reply to Post #7
Thanks Mark, that looks ideal for what I'm trying to do 👌

TCarper

Posts: 4620

#7 7 Aug 2026 at 1.15pm

Found you a couple of photos David.

Blocks would definitely be plenty strong enough, that's not the problem. Breeze blocks are mega porous. They soak up water like a sponge without a damp proof covering, like they get on the walls they are made for. They will transmit the damp straight up through the floor & be permanently wet on the ground.

vossy1

Posts: 8904

MODERATOR

#6 6 Aug 2026 at 10.31pm

In reply to Post #1
Stood the right way up breeze blocks are quite strong. I've 2 1000ltr ibc water tanks which collect water from my garage roof for the garden, they're raised off the floor with breeze blocks. I think theres 1 on each corner and 1 in the middle, mortared onto the concrete floor.

TCarper

Posts: 4620

#5 6 Aug 2026 at 3.54pm

In reply to Post #1
For completely different reasons, we have two outside garden rooms raised off the floor where we roll the hook baits. They are so attractive to mice we had too.

Paving slabs are what you need to raise it David, definitely not breeze blocks or pallets. Lay them on a bed of concrete to level. One of our rooms, 12ft x 10ft is on a very uneven surface for drainage reasons. It's so easy to level up with slabs. Make a timber frame on top of the slabs... Then just lay your flooring on top. Then you have a permanent raised, solid floor. Slabs are cheap.

I'll see if I can find a photo of one of ours being built.

0nslow

Posts: 1570

#4 6 Aug 2026 at 3.42pm

Thanks, I have been using wooden pallets doubled up, thought this would have been stronger

Baitman

Posts: 5121

#3 6 Aug 2026 at 1.24pm

In reply to Post #1
Have a look at plastic pallets, maybe 🤔

ip100

Posts: 12477

#2 6 Aug 2026 at 12.35pm

In reply to Post #1
Those blocks you are on about are only really strong when stood up on their end so the hollows are vertical. Personally for what you describe I'd be tempted to build 6 small piers from block or brick and then build a timber platform on top. Or just get yourself some old scaffolding and build a platform from that. You can get it cheap enough from a local firm and it's dead easy to construct something

0nslow

Posts: 1570

#1 6 Aug 2026 at 11.00am

I need to raise some stuff off the floor in my garage and figured a bunch of rectangular breeze blocks with the holes in them would be ideal - sufficiently lifting stuff up so when the area floods the water can pass through easily and my stuff is high enough not to get wet.

Stuff I don't know and wondered if anyone has any pointers

Are breeze blocks strong enough for someone to walk over and hold weights up to say 200kg?

I'm looking at covering and area of about 3m squared (I need to measure accurately) then cover with some kind of sponge garage flooring. Is there a better/cheaper way to do this?

Will the blocks sit next to each other without cement or something holding them in place? Doesn't need.to be flush, just stable.

What kind of price should I expect to pay for new or second hand blocks?

Thanks


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