Preparing Your Midlands Property for Winter: A Damp Surveyor’s Checklist

December is here, and with it comes the combination of cold temperatures, increased rainfall, and sealed-up homes that creates the ideal conditions for damp and mould. In over a decade of carrying out independent damp surveys across the Midlands, I’ve seen how a few simple checks in late autumn can prevent significant problems from developing over the coldest months.

This isn’t about expensive works or specialist treatments — it’s about understanding your building and taking sensible precautionary steps before the worst of the weather arrives.

Check Your Gutters and Downpipes

This is the single most important external check you can make before winter. Blocked gutters overflow against the wall and saturate the masonry, leading to localised penetrating damp that can travel through to internal surfaces. After the autumn leaf fall, gutters should be cleared and downpipes checked for blockages at ground level. Look for any sections of gutter that are pulling away from the fascia or sitting at an incorrect fall — standing water in a gutter will eventually overflow regardless of whether leaves are present.

Inspect Roof Coverings Visually

You don’t need to get on the roof yourself — binoculars or a drone are useful here. Look for slipped, cracked, or missing tiles, particularly at ridges, hips, and valleys where water concentrates. Check the condition of any flat roof sections and look for signs of ponding or blistering. A small roof defect in October can result in significant ceiling damage by January.

Check Flashings Around Chimney Stacks

Chimney stacks are exposed to the elements and are frequently the source of unexplained upper-floor damp. The lead or mortar flashings that seal the junction between the stack and the roof covering are vulnerable to cracking and lifting. Water penetrating here tends to travel some distance before presenting itself internally, which is why homeowners often fail to connect the chimney with a damp patch several metres away.

Clear Airbricks and Subfloor Vents

If your property has a suspended timber ground floor, the subfloor void needs ventilation to prevent moisture accumulation and timber decay. Airbricks in the external wall provide this ventilation, but they’re frequently blocked by debris, soil build-up, or — in some cases — intentionally covered by well-meaning but misguided previous occupants. Check that every airbrick is clear and unobstructed before winter.

Check Window and Door Seals

Failed mastic seals around window and door frames are a very common entry point for moisture during driving autumn and winter rain. Run your finger along the perimeter seals and look for cracks, shrinkage, or gaps. Where the seal has failed adjacent to masonry or render, check the surrounding area for staining or soft spots.

Address Any Known Ventilation Issues

Winter is when condensation problems peak. Kitchens and bathrooms need adequate mechanical ventilation — extractor fans that are working correctly and ducted to outside. If you’ve been meaning to replace a noisy or ineffective extractor fan, now is the time. Approved Document F (2021) sets out the minimum flow rates for kitchen and bathroom fans in domestic properties, and these are not particularly high — most modern fans meet them — but the key is that the fan must be functional and ducted externally, not just into a roof void.

Consider a Pre-Winter Survey

If you have any concerns about damp in your property — areas that have been problematic previously, or new signs that have appeared this autumn — it’s worth having a survey carried out now rather than waiting until spring. Problems identified in December can be addressed over winter, whereas problems discovered in February often mean you’ve been living with avoidable dampness for months.

I carry out independent damp surveys across Birmingham, Stoke-on-Trent, Wolverhampton, Coventry, Derby, Leicester, and the wider Midlands. An independent survey gives you an objective assessment of what’s happening, without any pressure to purchase a particular treatment or product.

Quick Reference Pre-Winter Checklist

• Clear gutters and check downpipes
• Visually inspect roof coverings and flashings
• Check chimney stack pointing and flashings
• Clear all airbricks and subfloor vents
• Inspect and re-seal window and door perimeters as needed
• Test kitchen and bathroom extractor fans
• Monitor for condensation in bedrooms and living rooms as heating begins

Winter doesn’t have to mean damp. A proactive approach to these basic checks will significantly reduce the likelihood of moisture problems developing or worsening over the coldest months.

Richard Bull MISSE is an independent damp and timber surveyor covering the Midlands.