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How to Set Up a Rotary Laser for Setting Out a Foundation

How to Set Up a Rotary Laser for Setting Out a Foundation
Get a foundation wrong and you don't find out until the brickwork starts telling you. Here's how to set up a rotary laser and set out a foundation right first time — the trade way.

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Groundworker in hi-vis holding a measuring staff beside blue ducting and rubble on an open site, with a Grettz green rotary laser level set up on a tripod in the foreground

Best Laser Level for Groundworks and Civils
How to choose a laser level that stands up to groundworks and civils — the specs that matter outdoors, and which Grettz rotary laser fits your work.

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Groundworker in hi-vis holding a levelling staff beside blue pipework and rubble in an open trench, with a Grettz green rotary laser level set up on a tripod behind

How to Set Falls for Drainage With a Rotary Laser
A practical guide to setting accurate drainage falls with a rotary laser, covering gradient calculations, the dual-grade method and the staff-and-receiver method.

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Grettz green rotary laser level on an aluminium tripod with an LR receiver and red-graduated levelling staff clamped alongside, ready for levelling a floor

How to Level a Concrete Floor With a Laser Level
A practical step-by-step guide to checking levels, setting a datum and pouring or screeding a concrete floor flat using a rotary laser level.

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Complete Grettz G80 green beam dual-slope rotary laser kit laid out — tripod, green hard case, laser unit, LR receiver, remote control, battery packs, levelling staff, target plate and charger

Dual Slope Rotary Laser: Grade, Fall and X/Y Explained
Dual-grade rotary lasers project a set gradient, not just a flat plane — essential for drainage falls, ramps and driveways. Here's how they work.

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Grettz green rotary laser level in its open green moulded carry case on the ground outdoors, with accessories bag alongside

How to Set a Datum Point on Site With a Laser Level
A datum is the single reference height every level on site is measured from. Here's how to establish one properly with a rotary laser and staff.

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Tradesperson in a white hard hat and hi-vis vest setting up a Grettz green rotary laser level on a tripod against dark cladding, with a levelling staff mounted alongside

How to Set Out a Foundation With a Rotary Laser
Setting out a foundation with a rotary laser is the most important hour of any build. This is the practical, no-waffle UK trade guide — from tripod placement to FFL datums, corner readings, dig levels and common mistakes to avoid.

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