Bangor Damp and Mould: Gwynedd Heating Gaps, Student HMOs and Heavy Rain

In Gwynedd, 3.2% of households have no central heating, more than double the Welsh figure of 1.2%. Bangor's rental market is heavily shaped by Bangor University, with a large HMO sector in the cathedral city's Victorian terraced housing, and about 1,115 mm of rain falls each year at the nearest station, Aber, around five miles away. The census and flood figures below are for the whole of Gwynedd, not Bangor alone.

Gwynedd in numbers (compared with Wales)

• Private rented households: 17.3% (Wales 17.0%); social rented: 16.7% (Wales 16.5%)
• Terraced homes: 29.9% (Wales 26.6%); flats: 8.4% (Wales 11.7%)
• Homes with no central heating: 3.2% (Wales 1.2%)
• Overcrowded households: 1.9% (Wales 2.2%)
• River or sea flood risk: 4.1% (Wales 2.1%); surface-water risk: 5.6% (Wales 3.9%)
• Rainfall: about 1,115 mm a year at Aber No 2, roughly five miles away

Why is the heating figure the one to watch?

Condensation forms where warm, moist air meets cold surfaces. Homes without central heating rely on fires, portable heaters or a single warm room, leaving walls elsewhere cold. With overcrowding below the Welsh figure, the cause in an unheated home is more often cold than too many people. A fixed heating system and better insulation tackle the damp and the cost of keeping warm together.

Student HMOs in Victorian terraces

A large HMO sector in solid-walled Victorian terraces means many people living in cold-walled houses with limited drying space. Automatic extraction, heating that reaches every room and a written guide for each new set of tenants reduce condensation. Larger HMOs carry licensing and management duties of their own.

Rain and flood risk

Both flood measures are above the Welsh figures, at 4.1% for rivers and the sea and 5.6% for surface water, and rainfall is over a metre a year. Check ground floors and drainage in low-lying properties and keep gutters, gullies and roofs in good order. Because the figures cover the whole county, a flood check should be done at address level using Natural Resources Wales flood maps.

What landlords must do in Wales

In Wales, the Renting Homes (Wales) Act 2016 makes fitness for human habitation, including freedom from damp and mould, an implied term of every occupation contract. The Homes (Fitness for Human Habitation) Act 2018 is England-only.

Awaab's Law applies in England only. For the position across the UK, see our guide to Awaab's Law and the private rented sector.

To find a specialist, see our Bangor damp and mould page.