Exterior Painting

Almost every failed exterior in this market comes down to one of four things.

Moisture underneath. Water gets in behind the coating through a failed caulk joint, an unsealed end grain, or a masonry wall that cannot dry, and the paint lifts from behind. This is the big one on rowhomes, where tight blocks and shared walls mean slow drying.

Freeze-thaw. Late winter and early spring cycle above and below freezing repeatedly. Anywhere adhesion was marginal because the surface was dirty, chalky, or unprimed, that cycling pries the coating loose.

Chalking and sun. South-facing walls take a beating. Old coatings break down into a powder, and painting over chalk without washing and priming means the new coat is bonded to dust.

The wrong product on the wrong substrate. Standard exterior latex on brick, stone, or older stucco traps moisture inside the wall. It looks fine for a season and then comes off in sheets.

Every exterior we do starts with cleaning, and on most jobs that means pressure washing.

Pressure washing is also where a lot of damage gets done by people who treat it as a power tool rather than a prep step. Too much pressure drives water behind siding, chews up soft mortar joints, gouges wood, and forces moisture into stucco. We match the pressure and the tip to the surface, and on delicate substrates we use a low-pressure soft wash with a cleaning solution instead of brute force.

Then it has to dry. Painting a wall that is still holding water from a wash is a guaranteed callback, which is why washing and painting are not the same day on most jobs.

We also do pressure washing as a standalone service for decks, walkways, patios, and siding that just needs cleaning rather than painting.

Wood siding and clapboard. Scrape the loose material, sand the edges so the transition is not visible, spot prime bare wood, and replace anything rotted. Wood also needs the end grain and the butt joints sealed, which is where water gets in first.

Vinyl. Vinyl can be painted, but only with products rated for it, and only in colors no darker than the original. Going darker makes the panel absorb more heat and warp. We will tell you no on a color rather than take the job and watch it buckle.

Aluminum. Aluminum siding chalks heavily with age. It has to be washed until the chalk is gone, then primed with a bonding primer. Done right it takes paint extremely well and lasts.

This is the mistake we see most often on Philadelphia rowhomes, and it is expensive to undo.

Brick, stone, and older stucco are porous by design. They take on moisture and release it. Painting them with a standard acrylic exterior seals the face, so the moisture that gets in through the back or through the mortar has nowhere to go. It pushes the coating off the wall, usually in large sheets, and takes some of the masonry face with it.

Masonry needs a breathable, vapor-permeable coating, applied over a properly cleaned and neutralized surface. On previously painted brick it also means dealing with whatever is already there, which sometimes means stripping rather than recoating.

We also handle brick and masonry painting where a customer simply wants the color changed, and we will be straight about the fact that painting brick is close to permanent. Once it is coated, going back to bare brick is a serious and expensive job.

Stucco homes in the suburbs around Philadelphia have a well-documented issue. Houses built roughly between 1993 and 2006 are the highest-risk group for moisture failure, frequently because drain screeds were left off the bottom of the walls, so water that gets behind the stucco has no way out. The damage happens to the sheathing and framing behind the wall long before anything shows on the face.

If you are in Lansdale, Harleysville, Souderton, Perkasie, Quakertown, Horsham, Churchville, or Princeton in a home from that era, this is worth knowing about.

What we do: stucco painting and repair on sound walls, crack repair, and elastomeric coatings where the wall needs a flexible membrane that can bridge hairline movement. What we do not do is paint over a wall that is visibly bulging, staining, or soft, because that is a moisture intrusion problem that needs to be investigated before anything gets coated. Ed will say so rather than take the job.

Upper Bucks and Montgomery County still have real barns, pole buildings, and metal outbuildings, and almost nobody in this market advertises painting them.

Metal roof painting means removing rust, treating the surface, priming with a metal-specific primer, and applying a coating built for thermal movement, because a metal panel expands and contracts far more than wood does. Barn and metal building painting is the same principle at larger scale, usually sprayed.

If you are in Quakertown, Perkasie, Harleysville, or Souderton with a barn or a metal building that needs coating, that is work we take.

Caulk is the cheapest part of an exterior job and it does more to keep water out than the paint does.

Old caulk hardens, shrinks, and splits. Every one of those joints is a path for water into the wall. We cut out the failed material rather than caulking over it, then reseal around windows, doors, trim, corner boards, and penetrations with the right sealant for the joint. Caulking and weatherproofing is included on full exteriors and available on its own.

Exterior painting here is a spring, summer, and early fall job, and the ends of that window are the ones to think about.

Late spring through September is the reliable stretch. August humidity slows cure, so schedules stretch. October can be excellent, but night temperatures start dropping below what most exterior coatings need to cure properly, and a coating that goes on too late in the season never reaches full hardness before it takes its first freeze.

Booking in winter for spring work is the right move. The schedule fills first at both ends of the season.

Square footage matters least. What matters is height, condition, and substrate.

Two stories and up means staging or ladder work and slower production. Heavy scraping and priming on a wall that has failed is far more labor than a sound wall. Masonry and stucco need specialty coatings that cost more per gallon than standard exterior. Carpentry repair for rot, which we handle, is priced separately once Ed sees how far it goes.

Ed walks the whole exterior, including the parts you cannot see from the sidewalk, and gives you a written estimate.