Your Annual Damp Maintenance Checklist: Keeping Your Midlands Property Dry Year-Round
After years of carrying out independent damp surveys across the Midlands, one thing has become consistently clear: the properties with the fewest damp problems are not necessarily the best-built ones. They are the properties that are best looked after. A regular, structured maintenance routine — carried out by the owner or a competent contractor — prevents the small defects from becoming large ones, and keeps the building envelope in the condition it needs to be in to manage the moisture that every UK building encounters.
This post is a practical annual checklist, organised by season, that I share with clients and would recommend to any homeowner or landlord.
Spring (March to May)
Clear gutters and check downpipes. This is the most important single maintenance task for preventing penetrating damp. After the autumn leaf fall and winter storms, gutters should be cleared and checked for leaks and incorrect falls. Do this in spring so any winter damage is caught early.
Inspect the roof from ground level. Walk around the property with binoculars if needed and look for slipped tiles, open ridge joints, lifting flashings, and any debris that has accumulated on flat roof sections.
Check external pointing. Look at the mortar between bricks at low level and around window and door reveals. Frost damage can open up joints during winter. Any sections where mortar is loose, missing, or crumbling should be made good before the next wet season.
Clear airbricks. Make sure all airbricks are free of vegetation, soil, and debris. This is particularly important in properties with suspended timber ground floors.
Check ground levels. Confirm that the external ground is at least 150mm below the DPC. Any garden borders, paths, or paving that has built up against the wall should be addressed.
Summer (June to August)
Inspect render and external coatings. Summer, with dry conditions and low moisture content in masonry, is the best time to assess the condition of render. Look for cracking, bulging, hollow sections (which can often be identified by a hollow sound when tapped), and areas where the render may have separated from the substrate.
Check chimney stacks. With scaffolding weather typically better in summer, this is the time to arrange chimney inspection and repointing if needed. The flaunching around pot bases and lead flashings at the base of stacks both deteriorate over time.
Assess window and door seals. Check all mastic seals around window and door frames. Any that have cracked, shrunk, or lost adhesion should be raked out and replaced.
Check flat roof coverings. Arrange an inspection of any flat roof sections, particularly those that are more than 15 years old.
Autumn (September to November)
Clear gutters again. With autumn leaf fall, a second gutter clearance in November is important. Blocked gutters overflowing over winter are one of the most avoidable causes of penetrating damp.
Check airbricks before winter. Before ground vegetation dies back and frost arrives, confirm again that airbricks are clear.
Test extractor fans. Check that kitchen and bathroom extractors are working properly and are ducted externally. Replace filters if fitted. If fans are noisy or have reduced airflow, consider servicing or replacement before the winter condensation season.
Start monitoring for early signs of damp. As temperatures drop and heating comes on, watch for condensation on windows, early mould at corners, and any new staining on walls or ceilings. Catching problems early prevents them from becoming established.
Winter (December to February)
Maintain consistent background heating. A property that is kept at a reasonably consistent temperature — even when unoccupied — is less vulnerable to condensation damage than one with large temperature swings.
Monitor for condensation and mould. Check north-facing rooms, areas behind furniture, and corners regularly. If mould is appearing, increase ventilation and investigate whether background ventilation provision is adequate.
Document any new damp patches. Photograph any new patches that appear after rainfall or during cold spells. Note which direction the rain was coming from, how long the patch took to appear, and how long it takes to dry. This information is very useful for a surveyor if you subsequently commission a survey.
Avoid drying laundry on radiators. A single laundry load releases approximately two litres of water vapour. Where possible, dry in a tumble dryer vented externally, or in a closed room with a dehumidifier.
When to Commission a Survey
If your annual inspections reveal signs of damp that you can’t easily explain or attribute to an obvious maintenance issue, an independent survey is the appropriate next step. It provides an objective assessment of what is happening and a clear basis for deciding what — if anything — needs to be done.
I carry out independent damp surveys across the Midlands throughout the year. If you would like to discuss a survey for your property, please get in touch.
Richard Bull MISSE is an independent damp and timber surveyor based in the Midlands.