Protecting Stored Goods from Wildfire Smoke and Ash

Alberta’s wildfire seasons have grown increasingly severe, and even properties hundreds of kilometres from active fires face the effects of smoke and ash. For farmers and business owners with valuable inventory in storage, smoke season creates risks that are easy to overlook until damage is already done.

What Smoke Does to Stored Goods

Wildfire smoke carries fine particulate matter, volatile organic compounds, and ash that can infiltrate any poorly sealed storage space. Hay and grain absorb smoke odour that reduces palatability for livestock and may cause grade downgrades at the elevator. Machinery is vulnerable to ash contamination in air intakes, filters, and electronic components. Lumber and building materials can absorb odour that persists for months.

The financial impact ranges from minor cleaning costs to total inventory losses, depending on the duration and intensity of smoke exposure and the sensitivity of the stored goods.

How Enclosed Storage Helps

A fully enclosed storage building provides the first and most important line of defence against smoke infiltration. Buildings with closed end walls and properly tensioned covers prevent the direct entry of smoke and ash that open storage or tarp-covered piles cannot avoid.

The 750 g/m² PVC covers used on quality fabric buildings are essentially impermeable to airborne particles. When the cover is properly tensioned over the galvanized steel double-truss frame with minimal gaps at the base and end walls, the interior air quality remains significantly better than the outside environment during smoke events.

Ventilation Management During Smoke

Buildings configured with open ends or ventilation panels for normal airflow may benefit from temporary closure during heavy smoke events. Simple solutions like hanging tarps over open ends or closing adjustable ventilation panels can dramatically reduce smoke entry without requiring permanent modifications.

For buildings that house livestock, balancing smoke protection with ventilation needs is more complex. Animals need air exchange to prevent ammonia and moisture buildup, but smoke-laden air is harmful to respiratory health. In these situations, partial closure that reduces but does not eliminate ventilation is usually the best compromise.

Ash Cleanup

After a smoke event passes, inspect stored goods and the building interior for ash deposits. Ash is mildly corite and can cause surface damage to equipment finishes and metal components if left in contact with moisture. A simple sweep or blowdown of building surfaces and stored equipment removes ash before it causes problems.

For hay and grain, ash contamination on exposed surfaces is typically limited to the outermost layer. Moving or rotating stock after a smoke event ensures that the most affected material is used first or separated for quality assessment.

Long-Term Considerations

As wildfire seasons become a recurring reality in western Canada, covered storage is increasingly viewed as essential rather than optional infrastructure. The cost of replacing smoke-damaged hay, cleaning contaminated equipment, or discounting smoke-affected grain can easily exceed the cost of the building that would have prevented the damage in the first place.

Frequently Asked Questions

Does my insurance cover a fabric storage building?

Most farm and property insurance policies can be extended to cover fabric storage buildings, though coverage isn't always automatic. Contact your insurance provider before installation to confirm coverage and understand any requirements — some insurers may require specific anchoring methods, fire separation distances, or documentation of the building's wind and snow load ratings.

How do fabric buildings hold up in hailstorms?

The flexible PVC cover on fabric buildings actually handles hail better than rigid metal cladding in many cases. While metal panels dent permanently and can have fasteners sheared off by large hail, PVC covers absorb impact and return to shape. Severe hail can still cause damage, but minor hail events that would dent metal leave no mark on a quality PVC cover.

Are fabric buildings fire-resistant?

Standard PVC covers are not fireproof but are fire-retardant — they resist ignition and self-extinguish rather than sustaining flame. This makes them safer than untreated wood structures. For applications near fire-prone areas, maintain adequate firebreak clearance around the building and avoid storing flammable materials near the cover. Check local fire codes for specific requirements.