As a Columbia metal roof coating contractor, we restore patched metal roofs on older warehouses and downtown buildings, starting with the repairs already on them.
Columbia metal roof coating jobs often sit on brick buildings with decades of repairs layered on the roof. Tight streets and small lots also limit where a lift or trailer can park. We plan access first, then test each old patch for grip.
Loose patches come off, wet spots get opened, and the coating goes over a clean, firm surface.
Systems we use most here: Commercial Metal Roof Coating, Silicone Roof Coating, Shingle Roof Coating
Older buildings collect repairs. These are the signs we follow from the ceiling back to the roof.
A ceiling stain keeps returning next to a spot that was patched years ago.
The patch edge has lifted and water travels under it to the next fastener.
We remove the failed patch, dry and repair the panel, and prime before coating.
Inside walls stay dark along the top course of brick after rain.
Counter-flashing at the parapet has pulled away from the mortar joint.
Flashing is reset and sealed into the masonry, then the roof edge is coated.
Brown streaks show through an old painted roof surface.
The paint has lost its grip and rust is spreading beneath it.
Loose paint is scraped, rust is brushed to firm steel, and primer goes on before coating.
Puddles sit along one side long after rain.
Old gutters have sagged or clogged, so water backs up into the laps.
Gutters and outlets are cleared or repaired first so the coated laps can drain.
For an older Columbia building, coating over repaired metal brings these practical gains.
Tight old patches become part of one film instead of separate edges that lift.
Sealed edge flashing keeps rain from soaking into the brick below the roof.
Primed and coated panels keep rain away from rust that is still on the surface.
Work happens from the roof, so stores, offices, and storage below keep running.
A roof with one coating has fewer separate repairs to watch after each storm.
Light topcoats reflect more summer sun than old dark paint on the panels.
You get a record of which patches stayed, which came off, and why.
Lift and trailer spots near the roof edge are agreed in advance, which keeps sidewalks and lanes usable.
On Columbia's older roofs, four systems cover most of what we see. Condition and drainage decide which one we use.
Pitched metal roofs on warehouses take acrylic once old paint is stable and every lap is reinforced.
Flat rear additions and connector roofs where water lingers get silicone after drains are cleared.
Older flat roofs with dry insulation can take spray foam and a topcoat when added insulation helps.
Mansard faces with flat, flexible shingles can take a coating approved for shingles; curled ones need new shingles.
A patch that keeps failing usually has water under it. Call us with the building address and we will look at what sits beneath.
Five steps, in this order, with access and patch testing built in before any coating is mixed.
We walk the roof, map every old patch, check flashing at brick walls, and note where a lift or trailer can safely park.
Each patch gets an adhesion check; loose ones come off and any wet metal or insulation underneath is opened and dried.
Thin steel is patched or replaced, screws are upsized, and parapet flashing is reset into the masonry.
Pressure washing removes chalk and dirt, rust is brushed down, and primer covers bare steel and old paint.
Coating goes on section by section at the specified thickness, with extra build at laps, patches, and edges.
We coat commercial metal roofs in Lancaster and the towns below. If your building sits somewhere else, call us or send us a message.
Farm shops and equipment buildings.
Ephrata metal roof coatingWarehouses and storage roofs, coated in sections.
Mount Joy metal roof coatingShops and plants, coated in mild weather.
Lititz metal roof coatingChurches, schools, and offices.
Millersville metal roof coatingWe work from the roof and keep street-level doors clear. Washing and coating are scheduled around store hours and deliveries, and any lift sits where it blocks the least foot traffic. Wash water is caught and directed away from sidewalks and parked cars.
Ask how old patches will be tested, what happens to wet insulation, and how thick the coating will be. A clear answer names the repairs, the primer, the system, and the film thickness, and explains who plans access on a tight lot.
Old patches often use different materials than the panels around them, and they move differently in heat and cold. We test each one for grip and look for rust or trapped water beneath. Firm patches stay and get primed.
Loose or wet ones come off before coating.
Often a compact lift or a ladder setup works where a large machine would block the street. We measure the lot, check overhead wires and sidewalks, and plan where materials sit near the roof edge.
When a job needs a street space, we raise that with the owner early.
Yes, small storefront roofs get the same steps as large warehouses. The roof is inspected, patches tested, and the coating applied in one short stretch so the shop below is disturbed as little as possible.
Most older parapets need some. Loose counter-flashing, cracked coping joints, and open mortar at the roof line let water behind the coated edge. We reset the flashing into the masonry and point out mortar repairs for a mason before the roof edge is coated.
Send the address and a note about past repairs. We inspect, test the old patches, and coat the roof.
