A hard hat is one of the most important pieces of personal protective equipment on any job site. It protects against falling objects, impact, and in some cases electrical hazards. But like most PPE, a hard hat does not last forever. Knowing when to retire one is just as important as wearing it in the first place.
This guide explains how to read the date stamped on your hard hat, how long a hard hat is meant to last, and the warning signs that mean it is time for a replacement.
Where Can You Find the Hard Hat Expiry Date?
Hard hats do not carry a printed expiry date the way food carries a best-before date. Instead, manufacturers stamp the date of manufacture on the inside of the shell, usually below the brim.
This stamp usually takes the form of a small circle called a date wheel. The number in the centre shows the year of manufacture, and an arrow points to the month.
To find it, flip the hat over and look at the underside of the brim. Once you know the manufacture date, you can work out the expected service life.
How Long Until the Hard Hat Expires?
The service life of a hard hat depends on the manufacturer and the model, so there is no single rule that fits every hat.
The most common standard is that hard hat shells should be replaced after no more than two years of regular use, or five years from the date of manufacture, whichever comes first. Some manufacturers, including 3M, recommend replacing the shell every two to five years depending on the work environment. Older guidance sometimes cites a three-year lifespan, so it is always best to check the specific instructions provided with your hard hat.
Suspensions, the straps inside the shell that hold the hat on your head, wear out faster than the shell itself. Most manufacturers recommend replacing the suspension every twelve months, even if the shell still has time left.
How Long Does a Hard Hat Last?
It is a common misunderstanding that a hard hat is safe to use right up until its expiry date. The expiry date represents the maximum possible lifespan under ideal conditions, not a target for replacement.
In practice, hard hats are exposed to sunlight, temperature changes, and regular knocks. Manufacturer instructions often state that a hard hat should be discarded immediately after any impact, even when there is no visible damage.
A hard hat’s service life begins the first time it is worn. It is good practice to record this date and carry out regular visual inspections for cracks, dents, and other signs of wear.
What’s the Maximum Time You Can Use a Hard Hat?
The maximum amount of time you can get out of a hard hat depends on two things: how long it sat in storage before you started using it, and what happens to it once it is in service.
A hard hat is rarely put into use the day it is manufactured. It typically spends time in transport and storage before reaching a job site. This time counts against the overall lifespan. For example, a hard hat with a five-year expiry from the manufacture date that spends six months in storage before its first use will only provide four and a half years of usable service.
If the hat is damaged at any point, whether after three months or three years, it should be replaced immediately, regardless of how much time was left on the expiry date.
What if Your Hard Hat Has Expired?
If a hard hat has reached its expiry date, it should be replaced even if it has never been worn and shows no visible signs of damage.
This is because the plastic shell of a hard hat breaks down over time, regardless of use. Exposure to cold, heat, or sunlight during storage can cause the material to become brittle and lose some of its ability to absorb and deflect impact. A hard hat that looks new on the outside may no longer perform the way it was designed to.
Once a hard hat has passed its expiry date, its protective performance can no longer be guaranteed. At that point, it should be taken out of service.
When Should a Hard Hat Be Replaced?
A hard hat should be replaced any time one of the following applies:
- The expiry date has passed
- The shell has dents, cracks, or scratches
- The hat has been painted or exposed to solvents, chemicals, or adhesives
- The shell appears warped, scorched, or discoloured
- The hat has been taped together
- The hat has sustained a noticeable impact, even without visible damage
Setting a Replacement Schedule
Many workplaces choose to set a blanket replacement schedule, such as every two or three years, and use a colour or marking system to track when each hard hat was issued. This is a useful way to make sure hats do not quietly exceed their expiry date. However, a fixed schedule should not replace regular inspections, since damage can occur well before a hat reaches the end of its planned service life.
Suspension Replacement
Even when the shell of a hard hat is still in good condition, the suspension should be replaced on its own schedule. Most manufacturers recommend replacing the suspension every twelve months, since it wears out faster than the outer shell and plays a direct role in how well the hat absorbs impact.
FAQ About Total Tools & Supplies
What does Total Tools & Supplies sell?
Total Tools & Supplies supplies tools, equipment, and personal protective equipment, including CSA-compliant hard hats and safety helmets, for contractors and tradespeople.
Where is Total Tools & Supplies located?
Total Tools & Supplies is located across 3 different branches, in Sudbury Ontario, North Bay Ontario, and Rouyn-Noranda in Quebec.
Does Total Tools & Supplies carry CSA and ANSI certified hard hats?
Yes. Total Tools & Supplies stocks hard hats and safety helmets that meet CSA Z94.1 and ANSI/ISEA Z89.1 standards, suitable for construction, industrial, and trade environments.
Can I order PPE in bulk for my crew?
We can fulfill any order size for jobs big and small. We regularly work with contractors and companies to supply bulk orders of PPE and safety equipment.
How can I contact Total Tools & Supplies with questions about PPE?
To reach out to your local branch and inquire with our staff click here
