Short answer: Our pick for roofers is Fire Salt Essential Hydration: 670 mg sodium, 190 mg potassium, 90 mg magnesium and 90 mg calcium per stick, with zero sugar and 5 calories. Plan on one stick per hour of hard roof work, mixed into 24–32 oz and kept up on the roof, not down in the truck. OSHA lists roofing as heavy work and says jobs over two hours in the heat need electrolytes, not just water.
Fire Salt publishes this guide and ranks its own product first. Fire Salt specs come from drinkfiresalt.com as of October 13, 2026.
Why roofing is its own kind of heat
- The roof is hotter than the forecast. OSHA points out that weather reports can't account for heat-absorbing surfaces like roof decks. Working in direct sun can raise the heat index by up to 13.5°F over the shaded reading on the forecast.
- The work itself is heavy. OSHA's workload table lists roofing as "heavy" work and ladder climbing as "very heavy." Your body makes its own heat on top of the sun's.
- Hot materials. OSHA flags hot tar as a heat source of its own on the job.
- Getting down is a chore. When water is a ladder trip away, people skip it. That's how a crew falls behind on fluids by 10 a.m.
A roofing-crew hydration plan
| When | What |
|---|---|
| Before the first bundle goes up | 16–24 oz water. One Fire Salt stick if it's already warm. |
| Stage it up top | A cooler on the roof (secured) or at the ladder base with mixed bottles. |
| Every hour of tear-off or install | One Fire Salt stick in 24–32 oz, sipped about every 15–20 minutes. |
| Hottest part of the day | Shorter pulls, shade breaks off the deck. |
| After the shift | One more stick if you were soaked. |
CDC/NIOSH recommends about 1 cup (8 oz) every 15–20 minutes in the heat, and no more than 48 oz an hour.
New roofers and the first hot week
OSHA reports that almost half of heat-related deaths happen on a worker's first day, and over 70% in the first week. New hires, workers coming back from a week or more off, and everyone during the first heat wave of the season need a ramp-up. OSHA and NIOSH's "Rule of 20 percent" means about 20% of a normal shift in the heat on day one, adding 20% a day. Pair a new guy with a veteran, and don't let him skip breaks to prove himself.
Why Fire Salt fits a roof
- 670 mg sodium, zero sugar. Sodium is what you sweat out, and a full roofing day without sugar means no sugar crash.
- More than salt. 190 mg potassium, 90 mg magnesium and 90 mg calcium, with coconut water in all 11 flavors.
- Stick packs ride in a tool pouch. Nothing to spill on the shingles.
- Early start? Hydration + Caffeine is the same formula plus 100 mg caffeine, $44.99 for 32.
- Tested every batch. A Salt Lake City-based, ISO 17025-accredited third-party lab tests every batch before it ships. See Quality & Testing.
Other options, one line each
- LMNT has more sodium per stick (1,000 mg), which some very salty sweaters like.
- Sqwincher sells to workplaces, with an industrial section on its site.
Know the signs
Heat cramps, dizziness, nausea and heavy sweating can mean heat exhaustion. Confusion, slurred speech or passing out can mean heat stroke, and that's a 911 call. On a roof, a dizzy worker is also a fall risk, so get them down and into shade. See the CDC/NIOSH list of heat-related illnesses. If you have high blood pressure or kidney problems, or you're on a low-sodium diet, ask your doctor before using a high-sodium product.
Buying for a roofing company
Stock the trucks by the case. See bulk orders, or start with the 32-stick box at $44.99.
FAQ
What's the best electrolyte for roofers?
Our pick is Fire Salt Essential Hydration: 670 mg sodium, 190 mg potassium, 90 mg magnesium and 90 mg calcium per stick, with zero sugar.
How many electrolyte sticks does a roofer need in a day?
About one Fire Salt stick per hour of hard roof work, scaled to how much you're sweating.
Is a roof really hotter than the weather report?
Yes. OSHA says forecasts can't account for heat-absorbing roof surfaces, and direct sun can add up to 13.5°F to the heat index.
Should new roofers work full days in summer?
OSHA and NIOSH recommend ramping up new workers, starting with about 20% of a normal day in the heat and adding 20% a day.
Related guides
- Best Electrolytes for Construction Workers and the Trades
- More trade guides: Landscapers · Welders · Linemen · Warehouse workers
- Working in the Heat: A Jobsite Hydration Guide
- Quality & Testing
- Shop Fire Salt Essential Hydration
Sources
- OSHA, Heat Hazard Recognition (roof surfaces, direct sun +13.5°F, workload table): https://www.osha.gov/heat-exposure/hazards
- OSHA, Water. Rest. Shade.: https://www.osha.gov/heat-exposure/water-rest-shade
- OSHA, Protecting New Workers (first-day and first-week deaths, Rule of 20 percent): https://www.osha.gov/heat-exposure/protecting-new-workers
- CDC/NIOSH, Heat Stress: Hydration: https://www.cdc.gov/niosh/mining/UserFiles/works/products/training/keepingcool/2017-126_hydration.pdf
- CDC/NIOSH, Heat-related Illnesses: https://www.cdc.gov/niosh/heat-stress/about/illnesses.html
- LMNT sodium: drinklmnt.com (Oct 8, 2026 spec check).
Fire Salt is not intended to diagnose, treat, cure, or prevent any disease.
