Have you ever seen a bird’s nest on or over a wall-mounted fire sprinkler head?
Birds — particularly Cliff Swallows — build dense mud nests on sprinkler heads. These nests can insulate the heat-sensitive element, delaying activation, or block and distort water spray patterns.
In many commercial settings, this isn’t a one-time issue, either. It’s not uncommon to see the same sprinkler head cleaned multiple times a year, only for the birds to rebuild within weeks.
Fire protection system impairments are no small issue. These conditions can lead to failed inspections, code violations, increased liability, and costly ongoing maintenance from repeated nest removal.
And without a physical deterrent, the cycle continues.
HY-GUARD EXCLUSION® Nest Blocker™ is a simple, code-conscious solution that prevents bird nests from disabling sidewall sprinklers, helping customers avoid compliance issues, reduce maintenance, and protect the integrity of fire protection systems.
Nest Blocker is ideal for environments where bird activity commonly interferes with wall-mounted sprinkler systems:
While designed primarily for commercial applications, Nest Blocker can be used anywhere sidewall sprinklers are vulnerable to obstruction.
Designed with NFPA 13 requirements in mind, Nest Blocker installs directly above the wall-mounted sprinkler to prevent birds from nesting on the sprinkler head.
It’s engineered to remain outside the critical operating zones of the sprinkler, avoiding interference with:
In other words, it preserves spray pattern integrity and thermal response while remaining code-compliant. Additionally, Nest Blocker:
It’s also important to note that the final approval of any Nest Blocker installation is subject to the Authority Having Jurisdiction (AHJ), those responsible for enforcing code standards.
Nest Blocker is designed to maintain full sidewall sprinkler functionality while eliminating nesting surfaces.
These features create an effective bird-deterrent shield without compromising fire protection performance.
Nest Blocker offers a practical, high-demand solution for customers.
Nest Blocker pairs naturally with inspection visits, exclusion work, and recurring maintenance programs, making it a practical solution for both technicians and facility managers.
It’s better to be prepared. Don’t let a preventable issue compromise a critical life safety system.
Reach out to our sales team today to learn how Nest Blocker can support your customers and expand your offerings.