Switching from Shingles to Slate Roofing: What Preparations Does My Roof Need?
Most homeowners have asphalt shingle roofing. It remains the most popular roof material because of its appearance, availability, performance, and affordability. However, have you considered switching to a different roofing alternative, such as slate? As a homeowner, if you are evaluating whether to change your worn and dated asphalt shingles to a slate roof, consider several critical factors that could impact your decision.
Transitioning From Asphalt Shingles To Slate Tiles
Shifting to slate tiles requires the homeowner to embrace a “different” approach to their roofing needs. A slate roof will likely outlast the homeowner’s possession of the home. In other words, installing a new slate roof will mean that future home buyers must appreciate the qualities of this long-term roofing alternative.
The Longevity Of Slate Roofing
On average, an asphalt shingle roof lasts 15 to 25 years. In some cases, higher-end products (such as designer or luxury models) may generate as many as 35 or 40 years of life. On the other hand, slate roofing provides an extended lifespan of between 50 and 200 years. Two centuries of life before needing replacement? Absolutely! Slate roofing has existed for hundreds of years and remains the gold standard for longevity.
The Prevailing Climatic Conditions
Slate roofing generally performs well in most regions of the nation. However, homeowners should know that it may require additional upkeep and “minor” repairs in particular areas of the country. Places experiencing frequent rainfall, powerful winds, heavy snowstorms, damaging hail, or dramatic temperature extremes may observe slate tiles eroding more quickly than expected (unless the homeowner has facilitated routine maintenance).
The Price Of Slate Roofing
The average cost of natural slate roofing is between $10 and $30 per square foot. Comparatively, asphalt shingles range from $4 to $10 per square foot. This price difference adds up when installing hundreds of square feet of new roofing. Additionally, constructing a slate roof requires far more hours of time and labor than a typical asphalt shingle roof.
The Quality Of Workmanship
Installing a new slate roof requires technical proficiency. Few licensed roofing contractors have the knowledge or experience to attach slate tiles correctly. Avoid novices who claim they can add a slate roof but don’t have a proven track record (i.e., an established portfolio of previous customers) demonstrating their competence in this area. “Tiny” details missed during installation can cause short- and long-term problems.
The Roof’s Structural Integrity
Slate tiles are heavy by design. Engineers estimate that the average slate roof weighs up to four times as much as a standard asphalt shingle roof. This added mass exerts substantial pressure on the structural aspects of your roofing system and home. Many homes cannot accommodate a slate roof without retrofitted modifications to the underpinnings (i.e., the framing) that gird the roof.
Preparing To Install A Slate Roof
As a homeowner, ask yourself the following questions as you consider a new slate roof:
Does your home have the necessary structural support?
The most crucial consideration in constructing a slate roof is whether your home can withstand the additional weight. Your home’s foundational and structural components must have sufficient reinforcement (or professional assurances from a qualified structural engineer) to guarantee it can support a slate roof.
Generally, a steeper slope enhances a slate roof’s service life. A roof with a lower pitch may not be ideal for slate tiles. Strengthening connection points between beams, rafters, struts, and joists can help improve a roof’s structural integrity. Upgrading or repairing your foundation also can enhance your home.
Does your roof possess the appropriate underlayment?
A roof’s underlayment provides essential waterproofing to prevent moisture from seeping through the roof’s outer surface. It is also a secondary barrier from outside elements, including powerful winds and damaging hail. Selecting the appropriate underlayment ensures that the surface roofing material performs as designed.
Typically, a slate roof utilizes an asphalt-saturated felt underlayment that meets the thickness requirements set forth by the manufacturer. A double layer may be necessary. The underlayment should also have a Class A fire resistance rating and be able to cushion slate tiles as they are attached to the roof decking.
Finding An Expert Slate Roofing Professional
Homeowners in Richmond, VA, Norfolk, VA, and surrounding communities can trust Stevens Roofing to deliver the highest-quality slate roofing materials and craftsmanship. Few roofing companies possess the knowledge and experience to construct a slate roof, but we are the exception.
At Stevens Roofing, we have the training and certification to ensure a smooth, uninterrupted transition from asphalt shingles to slate tiles. Contact us today to schedule your consultation (and receive a free slate roofing quote) or to ask questions about the advantages of installing a new slate roof.
