Preparing Your Roof for Snow
Snow in southern Louisiana is a rare event that requires special attention, particularly because our local structures aren’t typically designed for heavy snow loads. This guide will help you protect your property during unexpected winter weather events.
Understanding Snow Load Risks in Southern Louisiana
Southern Louisiana homes face unique challenges during snow events because:
- Local building codes typically focus on hurricane resistance rather than snow loads
- Many older homes weren’t constructed with snow weight considerations
- The humid subtropical climate can create dense, wet snow that’s significantly heavier than dry snow
- Rapid temperature fluctuations can lead to freeze-thaw cycles that stress roofing materials
Snow Load Chart for Common Southern Louisiana Roofing Materials
Roofing Material | Safe Snow Load (lbs/sq ft) | Inches of Wet Snow | Inches of Dry Snow |
Asphalt Shingles (standard) | 20 | 4 | 8 |
Metal Roofing | 30 | 6 | 12 |
Tile Roofing | 25 | 5 | 10 |
Flat Roof (TPO/EPDM) | 15 | 3 | 6 |
*Note: These figures are general guidelines. Actual safe loads depend on roof pitch, age, and overall structural condition.
Immediate Pre-Snow Preparation Steps
- Clear All Drainage Systems
- Remove leaves, pine needles, and debris from gutters
- Ensure downspouts are properly connected and unobstructed
- Check that all drainage paths lead away from your foundation
- Inspect Critical Areas
- Examine flashing around chimneys and vents
- Check for loose or damaged shingles
- Verify seal integrity around roof penetrations
- Look for sagging or uneven areas that might indicate structural weakness
- Attic Preparation
- Ensure proper insulation distribution
- Check for and seal any air leaks
- Verify adequate ventilation to prevent ice dam formation
- Install an attic thermometer to monitor temperatures
During the Snow Event
Monitor these warning signs that indicate dangerous snow load:
- Creaking or popping sounds from the roof structure
- Interior doors that suddenly stick or won’t close properly
- Visible sagging in ceiling drywall
- Cracks appearing in interior walls
- Windows or doors that become difficult to open
Emergency Response Procedures
If you notice any warning signs:
- Safely evacuate the building
- Contact Delta Roofing’s emergency response team immediately
- Do NOT attempt to climb onto the roof to remove snow
- Document any visible damage with photographs for insurance purposes
Professional Snow Removal Guidelines
For professional roofers performing snow removal:
- Use proper fall protection equipment
- Work in teams of at least two people
- Leave 2 inches of snow on the roof to prevent damage to roofing materials
- Use plastic snow rakes and shovels to prevent membrane damage
- Remove snow in symmetric patterns to maintain balanced loads
Post-Snow Inspection Checklist
After the snow melts, schedule a professional inspection to check for:
- Displaced or damaged shingles
- Stressed or separated seams on flat roofs
- Damaged flashing or roof penetrations
- Signs of water infiltration in the attic
- Gutter system damage or separation
- Structural deformation
Long-Term Preparedness Recommendations
- Structural Reinforcement
- Consider adding collar ties or rafters in attic spaces
- Install ice and water shield during next re-roof
- Upgrade insulation and ventilation systems
- Professional Maintenance
- Schedule bi-annual inspections
- Document all repairs and modifications
- Keep detailed records of snow events and any resulting damage