Grettz Hub
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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Rotary vs Line Laser: Which Do You Actually Need on Site?
A plain-English guide to choosing between rotary and line lasers, with real examples from bricklayers, plasterers, groundworkers and shopfitters.
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Choosing a Builders' Stringline: 8-Braid, Twisted, and What Actually Works on Site
Why 8-braid stringline outlasts twisted, what colour to pick for which job, and a few habits that’ll make a reel last the whole season.
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How to Calibrate Your Laser Level (and Why It Matters)
An accurate laser is the difference between getting paid and going back. Here's when to calibrate, a 60-second check you can do on site, and what Service 72 covers.
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