Why nets age
Synthetic fibres lose strength over time. Sunlight is the main cause: ultraviolet radiation breaks down the polymer, even when it is stabilised. Weather, abrasion against the structure, concrete, chemicals and heat from welding add to the damage. A net that passed its test when new may no longer absorb enough energy after a year outdoors. That is why EN 1263-1 requires test meshes and EN 1263-2 requires regular inspection.
Before each shift
A quick visual check by the supervisor or a trained worker:
- the net is complete, with no cut or broken meshes;
- the border rope and tie ropes are intact and properly fixed;
- joints between nets and gaps to the structure are closed;
- there is no debris or stored material in the net or below it;
- the label is present and readable.
After every impact
A net that has caught a person or been struck by a heavy object is taken out of use until a competent person has inspected the net, the ropes and the anchors. Hidden damage, such as stretched meshes or overloaded anchors, is not always visible at first glance.
Every 12 months: the test mesh
Test meshes are extra meshes tied into the net during manufacture, made from the same twine. At least every 12 months, one is removed and sent for testing. The result shows whether the netting still meets the minimum strength for its class. If it does, the net can continue in use until the next test; if it does not, the net must be withdrawn.
When to replace a net
- a test mesh has failed, or there are no test meshes left;
- the label is missing or unreadable, so the net cannot be identified;
- meshes are cut, broken or heavily abraded;
- the border rope is damaged;
- there are burn marks from welding or cutting;
- the twine is brittle, faded or hard to the touch from UV exposure.
Storage between projects
Clean and dry the nets before storage. Store them in bags, out of sunlight, away from heat, chemicals and rodents, and off the floor. Record the net identification, the inspection results and the next test date in a register.
See also the complete safety net guide and our construction safety nets, which are supplied with test meshes.
Frequently asked questions
How often should a test mesh be tested?
At least every 12 months, counted from the date of manufacture on the label.
Who can inspect a safety net?
A competent person: someone with the training and experience to recognise defects in nets, ropes and anchors.
Can a net be repaired?
Minor repairs may be made by a competent person following the manufacturer’s instructions, using the same material. A repaired net must be inspected before use.