Jerome commercial roof repair where older masonry walls meet the roof: counterflashing, parapet caps, and base flashing repaired in materials that match.
On older masonry buildings, most leaks start where the roof turns up a wall. Counterflashing tucked into mortar joints works loose, parapet caps open at their joints, and base flashing pulls away as the wall and roof move differently.
The owner FAQ notes that all of Jerome is a National Historic Landmark district, and the Town's Design Review Board reviews exterior changes with a paint and roofing form. Repairs use matching materials and muted colors, and steep streets keep material deliveries small.
Wall-to-roof joints on Jerome buildings fail in a few repeat ways.
A metal strip standing away from the brick with an open mortar line behind it.
Water runs down the wall face and behind the base flashing. Resetting the strip into a cleaned, repointed joint closes that path.
Gaps or failed sealant between cap sections along the top of the wall.
Rain enters the wall core and comes out inside or under the roof edge. Joint covers or new caps in a matching finish stop it.
Membrane at the foot of a wall sagging or peeling off the masonry.
Wall and roof move at different rates. Re-adhering or replacing the base flashing, then tucking the counterflashing over it, rebuilds the seal.
Damp or crumbling plaster near the ceiling along an exterior wall.
Water entering at the parapet usually shows on the wall before the ceiling. That points the inspection at the cap and counterflashing.
Water backing up at a narrow scupper cut through the parapet.
Long scupper openings clog and overflow onto the wall flashing. Clearing them and resealing the liner keeps water moving off the roof.
Closing the wall line protects old masonry and the rooms behind it.
Dry wall cores hold their mortar longer than walls fed by an open parapet cap.
Interior plaster near the ceiling stays intact once wall leaks stop.
Sealed cap joints keep rain out of the top of the wall.
Matching materials and colors keep the repair in line with the paint and roofing form.
Water stopped at the wall line never reaches the boards under the membrane.
Clear scuppers stop overflow from soaking the wall flashing.
Planned flashing and membrane lists suit steep streets with little room to stage.
Dated photos of each flashing detail document the work for the town record.
Jerome repairs mix low-slope membrane work at wall bases with metal caps and flashing at the top of the wall.
Base flashing, open laps, and patches on low-slope roofs behind parapets, in membrane that matches the existing sheet.
Flat roof repair details
Parapet caps, counterflashing, and metal roof sections repaired or replaced in a finish that matches the building.
Commercial metal roof repairCall and describe which wall shows water and how high. A roofer checks the parapet cap and counterflashing above that spot first.
Work follows the water from the inside stain back to the joint in the masonry.
Parapet caps, mortar joints, counterflashing, base flashing, and scuppers along every wall get a close look and photos before materials are chosen.
Damp plaster and stains inside are measured from the ceiling and the corner, which tells the roofer which stretch of wall to test.
A controlled water test on a single cap joint or flashing run confirms the entry point without soaking the whole wall.
Base flashing is re-adhered, counterflashing reset into a cleaned joint, and cap seams resealed or replaced in a matching finish.
After the next storm the marked wall stains are rechecked. Dry plaster confirms the joint, and photos go into the repair record.
Jerome sits uphill from the valley floor on SR 89A.
Answers for owners of older Jerome commercial buildings.
Materials that match what is already there, in muted tones. The Town of Jerome's Design Review Board reviews exterior changes with a paint and roofing form, so caps, flashing, and patches are chosen to blend with the building before the work is scheduled.
Check with the Town before work starts. Visible changes to caps, metal, and wall finishes fall under exterior review, while like-for-like membrane work out of sight is a question to confirm with the same office.
Because water entering at a parapet cap or loose counterflashing runs down inside the masonry. It surfaces as damp plaster high on the wall, often well before a ceiling tile stains.
Usually, yes. The old sealant and loose mortar come out of the joint, the flashing is reset, and the joint is sealed or repointed. Badly crumbled masonry is flagged for a mason.
They get cleared, and the liner through the wall is checked for splits. Long scuppers through thick parapets clog easily, so keeping them open protects the flashing on both sides.
They limit where trucks can park and how much material can be staged. Repairs are planned with a full material list so one smaller delivery covers the job.
By checking the marked wall stains after the next storm and comparing them with dated photos. Dry plaster and a dry wall base confirm the joint is closed.
Tell us which wall shows water. A roofer inspects the caps and flashing above it and explains the repair in matching materials.
Leave a name and number and a roofing contractor will call you back about the leak or damage.
Or call now: (928) 436-4827