We bought a 1980s house in Breda last year. One wall in the living room is damp to the touch, especially in winter. We've had it checked—no rising damp from the foundation, but the exterior mortar is crumbling and letting rain in. We're worried about mold and want to know: what's a realistic budget to fix the outside wall and replaster inside? Should we do both at once, or is there a cheaper way?
You'll likely need two jobs: exterior repointing/mortar repair (€800–1,500 for 25m² wall) and interior replastering (€600–1,200 for prep, new plaster, and finish). Total: roughly €1,400–2,700. Cost drivers: severity of mortar damage, whether scaffolding is needed, plaster finish quality, and local labor rates. Don't skip the outside repair—it's the root cause. This is not a "Besluit kleine herstellingen" job because structural moisture requires professional diagnosis. Get 2–3 quotes from local masons on AstraNL; they'll inspect and tell you if you can do phases separately or must do both together.
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