When painting is the right call
A proper job is not a spray-over. It is: pressure wash to remove dirt and loose oxidation, a scrub to take off the chalk that will otherwise stop anything from bonding, spot priming or full priming with a primer formulated for oxidized metal, then two coats of a quality exterior acrylic. Done that way it holds for ten to fifteen years. Done as a quick coat over unwashed chalk, it peels in two, and then you have a worse-looking house and a wasted budget.
The four conditions where painting is a waste of money
- Dents and creases. Paint does not fill a dent, it highlights it. A freshly painted wall of dented panels looks worse than a faded one because the uniform color removes the visual noise that was hiding the damage.
- Punctures and holes. Woodpecker holes, hail punctures and impact tears mean water is already behind the panel. Sealing the outside does nothing about that.
- Oxidation past the bonding point. There is a stage where the surface is degraded enough that nothing sticks reliably. We test it on site by scrubbing a section and seeing what comes off.
- Failed trim, corner posts and J-channel. If the accessories have separated, water is entering at the details. Painting the field of the wall does not address it and you will be back inside two years.
The question nobody asks first, and should
Before either decision: what is behind the panels? On most DMV homes clad in the 1960s and 70s, the aluminum went on over original wood siding, frequently with no housewrap. If there is rot at the base of the walls or around the windows, painting the outside is cosmetic work over a structural problem. That is a ten-minute answer from an opened test section and it changes the whole calculation.
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We inspect across Maryland — Montgomery, Prince George's, Howard, Anne Arundel, Frederick, Carroll and Baltimore counties. Free inspection, photo report within 24 hours, and the report is yours to keep whether or not you hire us.