Philadelphia flat roof replacement
Flat roof replacement for Philly rowhomes, usually done in 1–2 days
Talk to a local contractor about a full tear-off and a new EPDM, TPO or modified bitumen roof built to last 20–30 years. Get a written quote so you know the exact price before anything starts.
Is it time?
Signs you need a new roof, not another patch
- You've patched leaks more than twice in the last few years
- Soft or spongy spots when you walk on the roof
- It's a silver-coated tar roof with 2 or more layers
- The roof is over 20 years old (or you have no idea how old)
- Large areas of cracking, blisters or shrinking membrane
- Water stains in more than one room
Only one or two of these? A repair or coating may buy you years. See how to decide.
Replacement pricing
| Home | Roof size | Price |
|---|---|---|
| Rowhome | ~750 sq ft | Quoted on-site |
| Large rowhome / twin | ~1,100 sq ft | Quoted on-site |
| Single / large home | ~1,700 sq ft | Quoted on-site |
Your options
Choosing your new roof
All three are proven on Philadelphia rowhomes. Your roofer will recommend one based on your roof, budget and goals.
EPDM rubber
The most common modern flat roof in Philly. Durable, flexible in cold weather, and easy to repair years down the road.
TPO (white)
Reflects summer sun, so the top floor stays noticeably cooler. Seams are heat-welded for strength.
Modified bitumen
Tough, multi-ply roof that handles foot traffic well. Often the most budget-friendly option.
The process
What replacement day looks like
Inspection & quote
The roofer measures the roof, checks the layers and gives a written price with material options.
Tear-off
Old layers removed down to the deck. Any rotten boards are shown to you and replaced.
New roof installed
Insulation board where needed, new membrane, and new flashing at every wall and penetration.
Cleanup & paperwork
Debris hauled away and a magnet sweep for nails. Ask for the material and workmanship warranties in writing.
Replacement questions
How much does a new flat roof cost on a Philadelphia rowhome?
Pricing varies by project and is quoted on-site. The biggest factors are how many old layers need to come off, whether any decking is rotten, and the number of skylights, hatches and walls that need new flashing.
Can you put a new roof over the old one?
Sometimes a single existing layer can be covered, but most Philadelphia rowhome roofs already have multiple layers. A full tear-off lets the roofer find and fix rot and gives the new roof its full lifespan.
Do I need to be home during the replacement?
Usually not, as long as the roofer has roof access (a hatch or an approved ladder location). They'll walk you through the finished roof and photos afterward.
Does a new roof need a permit in Philadelphia?
Rules depend on the scope of work. Your contractor should know whether your job needs an L&I permit and should include it in the quote. Ask them directly.
Is financing available?
Many local roofers offer payment plans or financing. Ask about it when you call.