The Autumn Once-Over: Ten Quiet Checks for an Old Brick House

Late autumn has a particular smell on a lane: wet leaves, cold brick, the first hint of woodsmoke. It is also the moment when an old house starts to tell you what it needs before winter. Not in a dramatic way. In drips, stains, draughts and the odd crumb of mortar on the path.

The frost-eve walk-around is not a renovation plan. Think of it as a slow lap with a torch, a notebook and a reasonably suspicious eye. You are looking for water on the move, air that has been blocked, and cracks that have changed since last year. Here are ten places to look.

1. Gutters: where winter usually starts

Stand back and look along the gutter line rather than up at it. Sagging runs, mossy clumps, seedlings and dark overflow stains on the brick below are all clues. Clear the leaves after most of them have fallen, not before. A hand scoop and a stable ladder are better than a pressure washer, which can be brutal on old joints and fascia.

If a joint drips steadily or a length has pulled away from the wall, note it now. A small repair in dry weather is much kinder than a frozen overflow in January. Call someone if the run is long, the access is awkward or the gutter is fixed to a fragile fascia.

2. Downpipes and their shoes

Follow each downpipe with your eye. Check the hopper head at the top, the brackets against the wall, and the shoe at the bottom. Water staining below a hopper often means the joint has failed quietly. A shoe that stops short of the drain, or discharges onto paving, is simply moving the problem to the base of the wall.

A loose bracket can wait a week. Water running down brickwork cannot. If the pipe is cracked or the drain is blocked, deal with it before the frost arrives.

3. The plinth and its drainage

Many old brick houses sit on a plinth — a slightly projecting base that is doing quiet structural work. Look at where the ground meets it. Soil, gravel, paving and mulch should not be piled up against the brick. Clear silt from gullies and channels, and check that water is running away from the house rather than sitting in a little pond at the corner.

If the plinth is buried, or if you can see a damp tide mark rising, that is a job for a specialist rather than a bag of gravel and good intentions.

4. Air bricks: do not block them

Air bricks are easy to ignore until a joist starts to suffer. Clear leaves, soil, planters and climbing plants away from them. Check that any periscope vents still connect properly and that a new patio or raised bed has not swallowed them. Old houses need to breathe under the floor, and a blocked air brick is a slow, expensive problem.

Whatever you do, do not seal them up for winter. A draught under the floor is doing a job.

5. Chimney pots and flashings

From ground level, look at the pots. A cracked pot, a missing cowl or a bird guard that has shifted is worth noting. Check the flashing where the chimney meets the roof, too. Frost can open small gaps, and a leaning pot is not a DIY climb.

If mortar is crumbling at the top or the pot looks unstable, call a chimney specialist. This is one of those jobs where a quick look from the ground is sensible and a ladder is not.

6. Door thresholds and steps

Water loves a threshold. Check the gap under the door, the step outside it, and any drain or channel nearby. If water pools against the door in heavy rain, it will find its way in when the frost comes and goes. A draught excluder is fine, but not if it traps water against the frame.

Look at the step level as well. If a new doorstep bridges the damp course or sends water back towards the wall, it needs rethinking. Small changes in level matter more than they look.

7. Garden levels and planted walls

Walk the perimeter with a gardener's eye. Raised beds, soil heaps, ivy and trellises can all hide the junction between garden and brick. Keep soil and mulch below the air bricks and the damp course. Ivy is not automatically the enemy, but it can conceal a problem, so check underneath it rather than letting it write its own version of events.

If a bed has been built up against the wall, lower it or make sure it drains freely. Old brick does not want a permanent damp blanket around its feet.

8. Hairline cracks: watch, do not panic

Old brick moves. Fine hairline cracks in mortar are part of the story. Photograph them, date the photo, and compare next spring. A crack that is a couple of millimetres wide and has been there for years is usually a watching brief, not a crisis.

Call a structural engineer if a crack is wider, diagonal, stepped, spreading quickly, or if doors and windows start sticking. Do not reach for resin or sealant just because a crack looks untidy. Diagnosis first, decoration later.

9. Pointing and frost damage

Look closely at the mortar joints, especially on south-facing or exposed walls. If the mortar is recessed, soft or crumbling, frost can pop the face of the brick. That does not mean you should rush out and repoint everything with cement. Old brick usually wants a lime mortar that moves and breathes with it.

Small areas can be watched. Larger areas of failure need a specialist who understands the wall, not a general builder with a mixer and a deadline.

10. The sealant question

Every autumn someone suggests sealing old brick before winter. Be cautious. A breathable wall works because moisture can move through it. A sealant applied to the wrong wall can trap damp and make frost damage worse. If a specialist recommends a product after looking at the wall, that is one thing. Smothering old brick as a seasonal ritual is another.

After the lap

Back at the gate, look at your notes. Sort them into three piles: watch, fix, and call someone. Most of the list is about moving water away from the wall and letting air do its work. The rest can wait for a dry spring day.

An old brick house does not ask to be wrapped up for winter. It asks to be understood. A slow lap now is worth more than a frantic repair later.