Sloping workshop floor advice

[Monkey Mark]

Admittedly i have not read all the posts.
But could the higher end not be ground down or broken up and then re-concreted to a lower more even level?
If you're already thinking of self level compound, although more work to do this the cost would likely be similar as standard concrete is a lot cheaper.

Or, board it all level and make a removable channel as wide as your widest item that can be swapped with a ramp?

 

[Hemsby]

Had a similar problem back in 2014 I thought the initial problem was only that the floor was convex across the 8 foot width, but eventually discovered there was also a 4inch slope over its length mainly into an extension which had been knocked through. Thankfully all sorted now quite cheaply and easily. My garage is 24x8feet

Laying a new floor conventionally ie boards at 90 degrees to the “joists” would have been an issue with the machines etc in the garage I decided to lay both boards & “joists” parallel to each other across the garage but with 12” spacing’s to support the boards. This enabled me to lay 3 boards then move some equipment into that space and continue.

I used 1” flooring grade boards and 4x1 tanalised timber as the “joists” the only time consuming part was to find the highest point of the floor, then to fix one piece of 4x1 suitably packed to get it level.
It was then a simple process repeating this the length of the garage levelling every new “joist“. In my case it became necessary as I progressed to increase the number of stacked 4x1 to rectify the huge fall of the floor .

I secured the timber across the width of the garage about every 18” with varying lengths of concrete fixing screws. A good percussion drill was essential.

Due to height of my false ceiling joists (timber storage above) it was necessary to keep the new floor height to a minimum hence why I started with just one 4x1 (just thick enough to screw the board to)

It means I have a 2” step inside the garage door but that is a small price to pay for a now perfectly level floor. No longer do the machines roll away on their own while my back is turned.

If I could have had an increase in my new floor height I may have included insulation beneath.

The bandsaw was conveniently positioned and operational at all times to cut the large quantity of varying sized packing pieces.

I think the whole project took me 2 days working on my own. My only extravagance was a 6 foot level which made the whole process a doddle.