Quick Answer
Building a fire under a tarp poses risks of soot, tarps catching fire, and poor ventilation, which can lead to smoke inhalation and carbon monoxide poisoning.
Ventilation Issues
When building a fire under a tarp, the primary concern is ventilation. Inadequate airflow can lead to the accumulation of carbon monoxide (CO) and other toxic gases. Aim for a ventilation ratio of 10-15 air changes per hour (ACH) in your shelter. To achieve this, ensure a minimum of 10 square feet of ventilation area per person. Consider using a tarp with a built-in bug screen or incorporating a separate ventilation system.
Soot and Tarp Damage
Tarps are designed to protect against the elements, but they’re not fireproof. Soot and embers can damage the tarp’s waterproof coating, compromising its integrity. To mitigate this risk, position the tarp at least 6 inches away from the fire and use a fire ring or fire pit to contain the flames. Regularly inspect the tarp for signs of soot or damage and address any issues promptly.
Fire Containment
To prevent the tarp from catching fire, keep a safe distance between the flames and the waterproof material. A minimum of 12 inches of clearance is recommended. Consider using a fire-resistant tarp or a separate fire suppression system. Additionally, ensure the fire is fully extinguished before leaving it unattended to prevent accidental ignition of the tarp.
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