Dealing with a snow-laden roof can be challenging. Winter brings unique roofing concerns, especially in northern climates where heavy snowfall is common. Excessive snow loads can stress roofing systems and, in severe cases, lead to necessary roof repairs.
Can you blow snow off a roof to repair or prevent further damage?
This guide explains when snow removal may be necessary, the risks involved, and the safest methods to remove snow while protecting your roofing system.
Understanding the Impact of Snow on Your Roof
Most roofs are built to handle a specific snow load according to building codes. However, excessive wet snow can exceed those limits — particularly on flat or low-slope roofs that do not shed snow easily.
Weight: The Primary Concern
Wet snow is significantly heavier than dry snow.
- Dry snow: ~5 pounds per cubic foot
- Wet snow: Up to 20 pounds per cubic foot
A few feet of wet snow can quickly exceed standard design loads.
Monitoring snow accumulation is essential to prevent structural stress, ice formation, and potential roof damage.
Ice Dams and Winter Roof Damage
Ice dams form when melting snow refreezes at the roof edge, preventing proper drainage. Trapped water can back up beneath shingles and cause leaks.
Preventing ice dams typically involves:
- Proper attic insulation
- Adequate ventilation
- Routine inspections
Professional insulation and ventilation services can significantly reduce the likelihood of ice dam formation.
If ice dams have already caused water intrusion, prompt roof repairs may be necessary.
Assessing When Snow Removal Is Necessary
Light, dry snow only a few inches deep rarely causes structural concerns.
However, removal may be warranted when:
- Snow depth exceeds 12 inches
- Snow is heavy and wet
- Ice accumulation is visible
- Your roof is already aging or damaged
- The structure is flat or low-sloped
Additional weight from ice buildup can increase stress even if snowfall totals seem moderate.
If you’re unsure whether snow load poses a risk, scheduling a professional roof inspection is a safe and effective option.
Safe Snow Removal Methods
Removing snow improperly can damage shingles or roofing membranes. Safety — both structural and personal — should always come first.
Use a Roof Rake from the Ground
A roof rake is generally the safest option.
- Stand on stable ground
- Remove snow from the lower edge
- Leave a few inches of snow to avoid damaging roofing materials
Avoid scraping directly against shingles or membrane surfaces.
Use a Shovel Only If Safe
For flat or low-slope roofs with safe access, careful shoveling may be possible.
- Use plastic shovels (not metal)
- Work gently
- Avoid stepping near roof penetrations such as vents or solar panels
Never attempt snow removal in icy, high-wind, or unsafe conditions.
Use Ice Melt Carefully
Calcium chloride pellets can help break up packed snow and ice.
Avoid rock salt, which may damage roofing materials and gutters.
When to Hire a Professional
Roof snow removal can be dangerous. Falls are one of the most common winter-related home injuries.
Professional contractors have:
- Proper fall protection equipment
- Experience working in winter conditions
- Knowledge of roofing systems
- Tools to prevent further damage
Snow removal relieves structural stress but does not repair underlying damage.
If leaks, damaged shingles, or structural concerns are present, permanent repairs — or even a full roof replacement — may be necessary once conditions improve.
In cases of severe winter damage, emergency protection may also be required. Professional emergency home repairs can prevent additional water intrusion until full repairs are completed.
Protecting Your Roof During Winter
Routine roof care is critical in preventing extensive winter damage.
Preventative steps include:
- Seasonal inspections
- Clearing debris before snowfall
- Maintaining proper attic ventilation
- Addressing minor repairs promptly
Timely snow removal — particularly for flat roofs — can significantly extend the lifespan of your roofing system.
Being proactive reduces the risk of premature deterioration and costly future replacements.
Need Winter Roofing Assistance? Contact RAM Exteriors
If snow accumulation has you concerned about your roof’s structural integrity, don’t take unnecessary risks.
RAM Exteriors — Serving Bucks County, Montgomery County & Surrounding Communities — provides professional roof inspections, winter damage repairs, snow-related emergency services, and full roof replacements to protect your home year-round.
When in doubt, consult experienced professionals who understand how winter weather impacts roofing systems. Contact RAM Exteriors today to schedule a professional evaluation.