Laser line
A laser line or line laser is an increasingly common construction tool that functions in the same way as a plumb line, chalk line or spirit level, to indicate a level line across a building element or site.
It is a small device, similar to a laser pointer that holds a laser and lens, which projects a line (or two crossed lines) of light against a surface. The device usually has a swing, hanger or level to ensure that the line remains horizontal ( with the crossed line perpendicular to this) even if placed on an uneven surface. The laser light is often red or green.
This is then used to find a level point across building surfaces, which might be needed in both structural elements such as the laying of foundations, or in finishing tasks such as tiling, to ensure the tiles remain horizontal. The laser line may also be installed with a clamp or tripod to allow the level to be move up or down as work progresses.
Rotating laser levels will project a level line around all surrounding surfaces.
[edit] Related articles on Designing Buildings
Featured articles and news
Designing Buildings reaches 20,000 articles
We take a look back at some of the stranger contributions.
Lessons learned from other industries.
The Buildings of the Malting Industry. Book review.
Conserving places with climate resilience in mind.
Combating burnout.
The 5 elements of seiri, seiton, seiso, seiketsu and shitsuke.
Shading for housing, a design guide
A look back at embedding a new culture of shading.
The Architectural Technology Awards
The AT Awards 2025 are open for entries!
ECA Blueprint for Electrification
The 'mosaic of interconnected challenges' and how to deliver the UK’s Transition to Clean Power.
Grenfell Tower Principal Contractor Award notice
Tower repair and maintenance contractor announced as demolition contractor.
Passivhaus social homes benefit from heat pump service
Sixteen new homes designed and built to achieve Passivhaus constructed in Dumfries & Galloway.
CABE Publishes Results of 2025 Building Control Survey
Concern over lack of understanding of how roles have changed since the introduction of the BSA 2022.
British Architectural Sculpture 1851-1951
A rich heritage of decorative and figurative sculpture. Book review.
A programme to tackle the lack of diversity.