District: Bywater - Full Control
Owner: Russell P Wolfe
HDLC Staff: Michala Daniels
Rating: Contributing
Applicant: Brigette Bruno
Permit #: 25-15311-HDLC
Description: Replace existing slate shingles with asphalt shingles at a Contributing rated, one-story, single-family residential building.
HDLC Guidelines: Section 5, Page 4 of the Guidelines for Roofing state that a slate roof can last 60 to 125 years depending on the roof slope, stone properties, formation, installation quality and regularity of maintenance. A failing slate often slowly delaminates, chips and absorbs moisture, causing the deterioration process to accelerate over time. Problems with slate roofs are typically the result of localized failure since many of the roof accessories and fasteners do not have the same 100- year life span as the slate itself. To extend the serviceable life of a roof, property owners are encouraged to address localized problems as they become apparent, using a qualified slate roofer. If over 20% of the roof slates are damaged or missing, replacement of the roofing might be warranted, although property owners are strongly encouraged to make every attempt to match decorative patterns and colors with replacement materials. Dimensional or architectural fiberglass asphalt shingles are manufactured by several companies, simulating the shapes, color and variegated color appearance of slate.
Staff Recommendations:
An exterior visual inspection of the roof was conducted by Staff on May 27, 2025, and confirmed the roof to be in poor condition from the public right-of-way. Overall, the current roof appears to have deteriorated. A majority of the slate tiles, especially on the left side of the building, show evidence of chipping, delamination, and scaling. Some tiles are visibly loose or missing. It is also possible that the slate roof is original or historic to the building and may be reaching the end of its intended lifespan.
Based on the current condition of the roof and the associated cost for repairing or replacing it with new slate material, replacement with asphalt shingles is likely an appropriate option in this case. Additionally, because the proposed new asphalt roof shingles will mimic the appearance of slate and allow for the retention of the existing roof ridge tiles, Staff has no objection to the request for replacement.
Staff Recommendation: No Objection