What causes leaks in rubber roofing systems?

Almost never the field of the membrane. Leaks start at the seams, the penetrations — pipe boots, vents, drains — the parapet flashings, or where the membrane has shrunk and pulled tight at the edges. Standing water from poor drainage accelerates all of it. When we walk a flat roof, those are the details we read first.

How often should I schedule rubber roof maintenance?

Twice a year for a Boston flat roof — once before winter and once after. Our freeze-thaw cycles are hard on seams and flashings, and a spring inspection catches the damage the cold left behind before it turns into an interior leak. A scheduled walk is far cheaper than the water damage it prevents.

Do you offer commercial roof repair in Boston?

Yes. We work on commercial and multi-family flat roofs as readily as residential ones — office buildings, retail spaces, industrial facilities, warehouses, and apartment complexes across Boston, Cambridge, and the Seaport District. The membrane systems are the same; the scale and the access are what change, and we plan for both.

How do you fix a rubber roof leak?

We find the actual source first — most leaks show up far from where they enter. Then we patch the damaged area, reseal the seam, or rebuild the failed flashing detail with manufacturer-spec primer and seam tape, not contact cement. The goal is to restore the system to watertight, and to tell you honestly whether a patch holds or the roof has reached the end of its life.

How do I know if I need rubber roof repair?

Visible cracking or shrinkage in the membrane, ponding water that doesn't drain, staining on the ceiling below, or a climbing energy bill from heat escaping through a tired roof. Any one of those is worth a diagnostic walk. We'll tell you whether it's a repair or whether the membrane is genuinely done.

Flat roofs. Diagnosed honestly. Patched or replaced — never sold up.

The flat roof you have is usually fixable

Most flat roofs we see are EPDM (single-ply rubber) installed in the 1990s or 2000s. They have 25-to-30-year service lives, and they fail at the seams, the penetrations, and the parapet flashings — almost never in the field. A skilled repair on a good substrate buys you years.

We work the same way on a flat-roof townhouse in Cambridge as on a commercial building in the Seaport District. Triple-deckers, apartment complexes, office and retail buildings, warehouses — they all run on the same single-ply systems and fail at the same details. What changes from a row house to a 20,000-square-foot deck is the scale and the access, not the craft. We install EPDM, TPO, and modified-bitumen — the three honest single-ply systems for Boston flat roofs — and we don’t reach for spray foam or coatings except as a last-resort, buy-time measure.

Flat roof installation in progress with copper-clad posts

How we diagnose and fix it

Full membrane diagnostic

We walk the field, the seams, every penetration, every flashing — and document what’s failing and what isn’t. Most leaks show up far from where they enter.

Patch or replace — the honest call

We give you the cost of each, the expected service life of each, and our recommendation. If it’s a leaking seam or a failed pipe-boot, we patch it and tell you it’s a patch. If the membrane is brittle or ponding in multiple spots, replacement is the right answer.