Choosing a Builders’ Stringline: What Actually Matters on Site
May 19, 2026
Stringline is simple kit, but the setup still matters. A good line cannot correct badly positioned profiles or posts, and a premium construction does not remove the need to tension and recheck it.
Braided vs twisted
Braided and twisted lines use different constructions. Braided line is often chosen for its handling and resistance to unravelling when damaged, while performance still depends on the material, braid, diameter and manufacturer. Avoid assuming every braided line has identical stretch or abrasion characteristics.
The Grettz stringline range uses an 8-strand braided construction and comes on 100m reels.
Which colour?
There is no universal winner. Pick the colour that contrasts most clearly with the background and lighting on the job. Grettz offers yellow, pink and green 100m 8-braid lines for that reason.
Tension matters
The line needs enough tension to provide a useful straight reference without overloading the fixing points or damaging the line. Long unsupported runs are more susceptible to sag and movement, so recheck the reference rather than relying on an arbitrary maximum distance.
Protect the line
Sharp profile edges, rough masonry and dragging across aggregate can damage any line. Rewind it cleanly and inspect worn sections before using them as an important reference.
Stringline or laser?
They are not direct replacements. Stringline creates a physical straight line that can be worked to. A laser can transfer level, plumb or a datum without a physical cord in the way.
For brickwork, see Stringline for Bricklaying. For fencing, see Stringline for Fencing.
The bottom line
Choose construction you trust, colour for contrast and a setup that can be checked. The reference points and technique matter at least as much as the reel.
