Flat and low slope roofs are common on row homes, additions, porches, garages and buildings in the South and West. Flat roof repair fixes leaking seams, blisters, punctures, failed flashing and ponding water, and decides when the membrane needs replacing instead.
Common materials include EPDM rubber, TPO, modified bitumen and older built up roofs with gravel.
When you need flat roof repair
- Leaks on the top floor or a porch ceiling
- Water that stays on the roof more than about 48 hours after rain
- Open seams, cracks or blisters
- Clogged drains or scuppers
- Damage after storms or foot traffic
What the job involves
- Inspect the roof and find wet insulation, sometimes with an infrared scan.
- Clear drains and fix ponding where possible.
- Repair seams, patches and flashing with matching materials.
- Replace wet insulation under the repair.
- Recommend replacement if damage is widespread.
What affects the cost
Sifixit does not quote prices, because every job is different. These are the things that move the price up or down, so you can compare quotes fairly:
- The membrane type and its age
- How much insulation is wet
- Number and size of repairs
- Access to the roof
- Drain and flashing work
- Coatings that extend the roof’s life
Insurance
Sudden storm damage to a flat roof is often covered. Leaks from age and wear usually are not. Keep records of maintenance, since insurers may ask.
Licensing by state
Rules differ a lot between states. Here is who licenses this work in the states Sifixit covers most. Always ask for the license number and check it with the state.
- Texas: no state roofing license. Check insurance, local address and manufacturer certification.
- Florida: roofing contractors are licensed by the Construction Industry Licensing Board.
- California: Contractors State License Board, C 39 roofing license.
- Arizona: Registrar of Contractors.
- Nevada: Nevada State Contractors Board.
- Georgia and Colorado: no state roofing license, though some cities such as Denver license roofers locally.
Read our guides: flat roof problems and Philadelphia row home leaks.
Local help for flat roof repair
- Roofing in Long Beach, CA
- Roofing in Los Angeles, CA
- Roofing in Washington, DC
- Roofing in Beaumont, TX
- Roofing in Burbank, CA
- Roofing in Dallas, TX
Quick answers: flat roof repair
How long does a flat roof last?
Often around 15 to 30 years, depending on the material and care.
Why is water pooling on my flat roof?
Low spots, clogged drains or a sagging deck.
Can a flat roof leak be patched?
Often, if the damage is limited and the insulation underneath is dry.
Should I coat my flat roof?
Coatings can extend life on some roofs. Ask a roofer which suits yours.
Who repairs flat roofs?
A roofer experienced with low slope roofs. Sifixit can connect you with a local roofer.
Looking for flat roof repair? Call the number on this page to be connected with an independent local provider. For more background, see Ready.gov’s severe weather advice.
This site is a free service to assist homeowners in connecting with local service contractors. All contractors are independent and this site does not warrant or guarantee any work performed. It is the responsibility of the homeowner to verify that the hired contractor furnishes the necessary license and insurance required for the work being performed. All persons depicted in a photo or video are actors or models and not contractors listed on this site.
Helpful guides
- Is a roof leak an emergency?How to tell if a roof leak needs help tonight or can wait for a normal repair, and...
- Flat roof problems: leaks, ponding water and repair optionsThe most common flat roof problems are ponding water, open seams, blisters, cracked flashing and clogged drains.
- Roof replacement: what to expect, step by stepMost home roof replacements take one to three days.
- How to choose a roofing contractor and avoid storm chasersChoose a local roofer with a verifiable address, the license or registration your state requires, liability and workers...
- Asphalt shingles vs metal roof: which is better for your homeAsphalt shingles cost less up front, are easy to repair and suit most homes.
- How to find a roof leakStart in the attic with a flashlight during or right after rain, and look for wet wood, water...