Surface preparation for vacuum attachment
Ten seconds of preparation buys the whole holding force.
Why it matters more than technique
Almost every disappointing vacuum attachment traces back to what was between the pad and the surface. Dust holds the pad off the surface, creating a leak path around the entire circumference.
The routine
- Brush or wipe the attachment area — a dry cloth or a quick brush is usually enough.
- Wipe the pad itself. It has been sitting in a van or on a floor.
- Check for standing water, slurry, oil, curing compound and loose coating.
- Confirm flatness across the whole footprint — see flatness and steps.
Repeat it every time
On a dusty site, the surface reconstitutes its dust layer within minutes. Prepare immediately before attaching, not once at the start of the job.
What preparation cannot fix
Porosity. No amount of cleaning makes an open-textured block wall non-porous.
Poor coating adhesion. Cleaning a flaking painted surface does not make it safe.
Questions about this
How clean does the surface actually need to be?
Clean enough that nothing holds the pad off the surface. A quick brush and a wipe is normally sufficient — you are removing loose dust and grit, not polishing.
Should I clean the pad as well as the wall?
Yes, and it is the step most often skipped. The pad has been in a van or on a floor and carries its own layer of grit.