Project
Shingle and Flat Roof Replacement in Pittsburgh
A Pittsburgh row house with both steep-slope shingles and a flat roof section developed an active leak. The mixed roof design required different materials and details for each surface, while failed flashing, limited ventilation, and compromised gutter hangers added to the scope. My Pittsburgh Roofing replaced the shingled section, restored the low-slope section with a compatible coating system, repaired affected decking, and updated the vulnerable transitions.
Project Overview
- Location: Pittsburgh, PA 15203
- Property: Two-story row house
- Project: Replacement and restoration of sloped and flat roof sections
- Approximate roof size: 8 squares
- Existing roof: 3-tab shingles and a flat-roof membrane
- New roofing: GAF Timberline HDZ with silver roof coating on the low-slope section
- Color: Fox Hollow Gray
- Installation time: 2 working days
The Challenge
The homeowner requested an inspection to identify the leak source and understand the overall roof condition. The inspection found several compromised flashing details and evidence of water intrusion. The building also lacked adequate ventilation, and the combination of a shingled slope, a flat roof, masonry transitions, and shared row-house geometry required careful treatment at every connection.
Inspection and Project Plan
The crew removed the existing shingled roofing, repaired the deck where needed, and installed premium underlayment, ice-and-water protection, GAF Timberline HDZ shingles, and ridge ventilation. Step flashing, wall flashing, and chimney flashing were replaced or corrected at the main transitions. The low-slope roof section received a silver roof-coating system selected for that surface, allowing the two roof types to be addressed with materials appropriate to their pitch and construction.
Work Completed
- Removal and disposal of the existing shingled roof
- Roof decking repair or replacement where required
- Premium underlayment
- Ice-and-water leak barrier
- GAF Timberline HDZ shingles in Fox Hollow Gray
- Step and wall flashing
- Chimney flashing
- New ridge ventilation
- Silver roof coating for the low-slope roof section
- Final project inspection
Final Result
The active leak was resolved, and the home now has renewed protection across both the shingled and flat roof surfaces. Updated flashing addresses the transitions where water had entered, while added ventilation helps the upper floor and attic release heat more effectively. The mixed roofing scope was completed in two working days and verified at final inspection.
Need Help with a Shingle and Flat Roof Combination in Pittsburgh?
Mixed roof systems require different materials and careful detailing where slopes, walls, chimneys, and low-slope surfaces meet. My Pittsburgh Roofing can inspect the full assembly and recommend a coordinated solution for each roof type on the building.
