Painting exterior masonry in the North East is a different job to painting a sheltered wall down south. Between wind-driven rain off the coast, salt-laden air, long damp spells and the granite and harling that cover so many Aberdeen and Aberdeenshire buildings, the wrong paint — or the wrong prep — can peel, flake or trap moisture within a couple of winters. Get it right, though, and a good masonry system will protect and smarten a property for a decade or more.
This guide walks through choosing the right masonry paint, preparing the surface properly, and timing the job around our weather — with specific notes for granite, harling and render.
Our climate does three things that punish exterior coatings. It keeps walls wet for long periods, so moisture needs a way out of the masonry. It drives rain horizontally into the surface, so coatings have to shed water without sealing the wall like a plastic bag. And near the coast, salt spray accelerates breakdown of cheaper films.
The single most important idea to take away is breathability. Masonry naturally holds and releases moisture. If you coat it in a cheap, non-breathable plastic paint, water still gets in through hairline cracks but can’t escape — it builds up behind the film and pushes it off the wall, often carrying the surface of the masonry with it. A breathable (microporous) masonry paint lets the wall dry out while still repelling driving rain. This matters more here than almost anywhere.
Not all masonry is the same, so match the paint to the surface:
Granite. Aberdeen isn’t the Granite City for nothing. Granite is dense and low-porosity, which means adhesion is the challenge — the paint has less to key into. A quality masonry primer or stabilising solution first, followed by a breathable mineral or high-grade acrylic masonry paint, gives the best grip and longevity. Mineral/silicate systems bond chemically with the substrate and are exceptionally durable and breathable, which is why they suit stone so well.
Harling (roughcast/wet dash). Harling is everywhere in Scotland, and its rough, textured surface actually holds paint well — but it drinks the first coat, so budget for extra paint and always apply a stabilising primer on older, dusty or previously limewashed harling. A flexible, breathable masonry paint copes best with the surface’s movement and texture.
Smooth render and pebbledash. Modern renders take masonry paint readily; just make sure any new render has fully cured (typically 4+ weeks) before painting. Pebbledash, like harling, is thirsty and textured — work the paint well into the surface.
For breathable, durable systems built for exactly this kind of exposure, our Caparol mineral and masonry ranges are a strong choice, and we stock breathable exterior options from Tikkurila too. You can see the full exterior masonry paint range here, and if you’re not sure what suits your wall, our team will talk it through with you.
Prep is 80% of the result. Rushing it is the most common reason exterior paint fails early.
Timing is half the battle up here. Aim for a settled, dry spell in the warmer months — roughly late spring through early autumn is your realistic window, which is exactly why now is a good time to plan the job.
A few rules of thumb: don’t paint below about 8°C (many masonry paints need this minimum to cure), avoid painting in direct hot sun on a south-facing wall as the surface can skin too fast, and never start if rain is forecast within the drying window — driving rain on a half-cured coat is a recipe for failure. Give each coat the full recoat time on the tin before the next; our weather rarely rewards impatience.
Sometimes the right advice is to leave stone bare. Traditional lime-based buildings and some historic granite are designed to breathe in a specific way, and the wrong coating can do real harm by trapping moisture in the wall. If you’ve got an older or listed property, or you’re seeing persistent damp, it’s worth getting advice before you commit — a breathable mineral system or a specialist approach may be needed, and occasionally no paint at all is the correct answer.
The formula for masonry that lasts up here is simple: a breathable paint, matched to your surface, over properly prepared walls, applied in a dry weather window. Do those three things and you’ll get years out of the job.
Pop into the shop in Bucksburn and bring a photo of your wall — we’ll help you pick the right system and the right quantity, whether it’s granite, harling or render. Browse the exterior masonry paint range to get started, and remember we offer free UK delivery on orders over £100.
