Slate is an undeniably beautiful and classic roofing material.  It’s also a high-end, luxury roofing material that comes with a high-end, luxury price tag.  If you’ve been dreaming of a new slate roof for your Philadelphia home you’re probably wondering just how much it will cost.

Average Cost to Install a New Slate Roof in Philadelphia

The average cost to install a new slate roof in Philadelphia is between $$25,000 and $80,000 and can climb even higher.  There is a lot of variability in the cost to install a new slate roof, but you can generally expect to pay between $15.00 and $35.00 per square foot for a slate roof installation.

Philadelphia slate roofing professionals

How Roof Size Impacts Roof Installation Cost

Because roofing materials are priced by square, the size of your roof will ultimately be one of the biggest factors in determining how much it will cost to install your new slate roof in Philadelphia.  The actual surface area of your roof can be complex to calculate and a professional Philadelphia roofer like Industrial Roofing Contractors will take the time to get precise and accurate measurements.  In the meantime, you can generalize the size of your roof by finding out the square footage of the footprint of your home.

  • 1000 square foot roof: $15,000 to $35,000
  • 1500 square foot roof: $22,500 to $52,500
  • 2000 square foot roof: $30,000 to $70,000
  • 2500 square foot roof: $37,500 to $87,500
  • 3000 square foot roof: $45,000 to $105,000
  • 3500 square foot roof: $52,500 to $122,500

Other Factors that Impact Slate Roof Installation Cost

While the size of your roof will ultimately play the biggest role in the cost of your new slate roof in Philadelphia there are several other factors that will need to be considered.

House Structure

One thing to understand about slate roofs – they’re HEAVY.  If you’re looking to replace an existing roof with a slate roof, you costs could be far higher than what’s mentioned in this article.  The home underneath a slate roof needs to be built specifically to hold the excess weight of the slate.  If your home wasn’t built for this, the structure will need to be retrofitted to be able to handle the slate roof.


Roof pitch refers to how steep the roof is.  Roofers use an industry standard pitch multiplier that helps them calculate the affect the pitch of the roof has on the size of the roof.  In general, as the pitch of the roof gets steeper, the surface area of the roof gets larger.  This means your contractor will need more materials to complete the installation.

recommended Philadelphia slate roofers

New Installation or Replacement

Whether you’re installing your new roof on a brand new home or your existing residence in Philadelphia will play a big role in the final cost of your slate roof installation.  As mentioned, you may run into the need to retrofit home if you’re replacing an existing roof.  Even if your home doesn’t need to be retrofitted, a replacement roof will typically be more expensive than a new installation due to the labor and disposal costs associated with removing the old roof.

Are you ready to explore your options for a new slate roof in Philadelphia?  Or maybe you’ve decided a less expensive option like asphalt or metal would be better for you.  Call Industrial Roofing Contractors, today, and let us help you decide on the best roof for your home!