Get a quote

How wide are the joints in concrete flag paving?

To allow for the flags dimensional tolerances and to create a gap to allow brushing in of kiln dried jointing sand flags installed unbound must have joints between 2-5mm.

Important: Straightness of lines is dependent on workmanship and any differences in sizes of the flags that result from the manufacturers permitted tolerances. Installing the flags using a 2-5mm joint can help achieve straight lines.

Tobermore do not recommend butt jointing flags. Butt jointing is when flags are installed tight together, touching. This will make achieving straight lines more difficult and causes the edges of the flags to spall.

Flags installed bound should have joints between 6-10mm.

Back to FAQs

Innovate your inbox

Subscribe to our bite-size email content for architects, engineers, housebuilders, groundworkers and contractors.

Every issue is packed full of ideas and inspiration for your next project. Plus we’ll keep you up to date on the latest industry standards and regulations, and in the know on the latest products and trends in hard landscaping.