Part of the house
Damp and the sea air
Answered by Asked in Ayrshire · Updated · Sources at the foot
Damp in coastal and rural Ayrshire houses usually comes from condensation, rain driven into exposed walls or poor drainage at the foot of old stone walls, and each needs a different fix.
This part of the site is about the walls, windows and air inside the house, and the outdoor kit that sits in the sea wind. Many coastal homes from Largs to Girvan are solid stone or old brick, which handle moisture differently from modern cavity walls, and many cottages stand empty for weeks in winter.
The main thing to know is that damp needs diagnosing before it is treated. The Scottish Government's guidance on traditional buildings warns that dampness should be properly diagnosed and not confused with condensation, and that injected damp-proof courses in solid masonry are usually found to be ineffective.
Home Energy Scotland gives free advice on condensation and keeping a home warm, and Historic Environment Scotland publishes guidance on looking after traditional buildings. The questions below cover why sea-front houses feel damp, how to tell condensation from rising damp, what salt air does to a heat pump's outdoor unit, and how to look after a cottage left empty over winter.
The 4 questions
- Why is our house by the sea so damp?
A house by the sea is often damp because moist air meets cold walls and windows, wind-driven rain soaks exposed gables, and salts in old stonework draw in moisture, especially in rooms heated only now and then.
- Is it condensation or rising damp?
Condensation or rising damp can look alike, but condensation appears on cold surfaces and comes and goes with cooking, washing and cold weather, while damp at the base of an old wall usually comes from poor ground drainage.
- Does salt air damage a heat pump's outdoor unit?
Salt air can damage a heat pump's outdoor unit, because salt spray and damp onshore wind speed up corrosion of its metal parts, so coastal models, careful siting and regular checks matter near the shore.
- How do we look after a cottage left empty over winter?
To look after a cottage left empty over winter, keep low, steady heat on a frost or holiday setting, have someone check it regularly, know where the stopcock is, and keep damp in check.