Slate roofs in Pittsburgh neighborhoods like Shadyside and Lawrenceville take a beating from the humid continental climate. Cold winters freeze water under the tiles and split them. We pull every piece, inspect the deck for rot, and replace any soft plywood before the new slate goes down. Cheap crews skip the copper step-down flashing at valleys and chimneys. That mistake shows up after the first big snow melt.
Allegheny County requires a permit once you tear off more than one layer on homes built before 1950. We pull the permit and schedule the inspection so the work stays legal. Most slate we use is 1/4-inch Pennsylvania black or gray from the same quarries that supplied the original roofs on Point Breeze houses. Anything thinner curls in the first warm summer.
Ice dams form fast along the eaves on Mount Washington and Greenfield roofs because warm air leaks from the attic. We add 6 feet of self-adhered membrane up from the gutter line plus new drip edge. Homeowners who skip this step watch water back up under the slate and stain ceilings every February.
Duquesne Incline area homes often have steep pitches that need extra toe boards and harness points. We set those up before we start stripping so the crew stays safe on 10/12 slopes. The whole job usually takes four to six working days once the old slate is off.
Slate Roof Replacement Services We Offer
✓Emergency Slate Roof Repair Pittsburgh
Same-day slate tile replacement and leak stop on active leaks in Oakland and South Side after storms.
✓Slate Roof Replacement Squirrel Hill
Full strip and re-slate on 1920s homes using 1/4-inch black slate and copper valleys.
✓Slate Roof Replacement Shadyside
Match existing slate color and thickness on historic Shadyside blocks with new underlayment.
✓Commercial Slate Roof Replacement Mount Washington
Low-slope commercial slate work on Mount Washington buildings with reinforced decking.
✓Slate Roof Replacement Lawrenceville
New slate installation on Lawrenceville row homes including ridge vent and copper step flashing.
Slate Roof Replacement Cost in Pittsburgh, PA
| Service | Typical Range | What Affects It |
|---|---|---|
| Full slate roof replacement 1500 sq ft house | $27,000–$42,000 | Price jumps with steep pitch or rotted deck boards. |
| Slate roof replacement 2000 sq ft house | $36,000–$56,000 | Includes copper valleys and new ridge vent. |
| Emergency slate tile replacement after storm | $650–$1,400 | Per 10-tile section plus leak stop. |
| Slate roof on commercial building Mount Washington | $45,000–$75,000 | Depends on square footage and deck reinforcement. |
| Free estimate and roof inspection | Free | Call 24/7 or stop by 2270 Roswell Dr Mon-Sat 7am-7pm. |
Ranges are typical for Pittsburgh, PA and confirmed with an exact written quote before any work starts.
How it works
- 1
Site Walk and Deck Check
We climb the roof, mark every cracked or missing slate, and test deck boards for soft spots. Takes 1 to 2 hours.
- 2
Permit and Material Order
We file the Allegheny County permit and order the exact slate thickness and color. Lead time is usually 5 to 7 days.
- 3
Tear-Off and Deck Repair
Old slate comes off, bad plywood gets swapped, and we add 6 feet of ice-and-water shield along the eaves.
- 4
Slate Install and Flashing
New 1/4-inch slate goes on with copper valleys and step flashing. Ridge vent added last. Four to six days typical.
- 5
Final Walk and Cleanup
We walk the roof with you, pick up every scrap, and run a magnet for nails. Job signed off same day.
Pricing
Slate runs $18–$28 per square foot installed in Pittsburgh depending on access and how much deck repair shows up.