Lead Work in East Harling

Expert Lead Work
in East Harling

Why lead work matters on your roof

Lead flashing seals the gaps where your roof meets a vertical surface - around chimney stacks, along parapet walls, at the edges of skylights, and in the valleys where two slopes join. These junctions cannot simply be covered with tiles or felt; they need formed metal that can be dressed tightly against masonry and that will move with the building through changes in temperature without cracking.

When lead flashings fail, the result is water tracking into the roof structure at a point that is often difficult to trace from inside. A damp patch on a ceiling near a chimney breast is one of the most common presentations, but the entry point can be several feet away from where the water eventually shows. Getting the diagnosis right matters before any repair work begins.

What lead work covers

The main types of lead work on a domestic roof are:

• Step and soaker flashing at chimney stacks and abutments - individual pieces that interlock with the tile or slate courses and direct water away from the junction.
• Back gutters and front aprons - the lead behind and in front of a chimney where it sits on a pitched slope.
• Valley linings - a continuous formed lead channel running along the internal angle between two roof slopes.
• Skylight and rooflight perimeter flashings - the seal around the frame of a VELUX or similar roof window.
• Parapet and abutment flashings - horizontal lead covering the top of a wall at its junction with a lower roof.

Each type is cut and dressed on site. The lead code (thickness) used matters: code 3 is the minimum for most applications, but code 4 or code 5 is better for wider flashings and valley work. Using under-strength lead is a false economy - it splits earlier and needs replacing sooner.

Typical costs

A repair to one side of a chimney flashing typically costs between £150 and £350. A full chimney re-flash - replacing all the lead around a medium stack including step flashing, soakers, back gutter and front apron - generally runs from £400 to £900. A valley relining on a typical semi-detached property ranges from around £300 to £700. Prices vary with access difficulty, the amount of lead required and the condition of the mortar chases.

What to do while you wait for a roofer - and what not to do yourself

This section is specifically for homeowners in East Harling who have spotted a problem but cannot get a roofer on the roof straight away. Knowing how to manage the situation - and what actions make things worse - can save you significant repair costs.

First: work out whether you have a lead problem or something else

Not every damp patch near a chimney is a flashing failure. Before assuming the lead has gone, consider these alternatives:

• Cracked or slipped roof tiles above the affected area.
• A blocked or overflowing gutter causing water to back up under the eaves.
• Condensation in the loft settling onto the ceiling below - this tends to be widespread rather than focused.
• A cracked or porous chimney pot allowing rain in through the flue.

If rain is getting in only during driving rain from one direction, a cracked chimney stack or porous brick is often the cause rather than the flashing. If it leaks in all wet weather regardless of wind direction, flashing failure is more likely. Pass this information to the roofer when you call - it helps them come prepared with the right materials.

Managing water ingress while you wait

If water is actively coming in, place a container to catch it and protect the floor. Lay old towels around the container to catch splashes. If the leak is at a chimney breast and you have a working fireplace, keep it unlit - a lit fire creates updraught that can pull more moisture down through a damaged flue area.

In the loft, if you can safely access it, look for where the water is entering the structure. Do not attempt to walk across ceiling joists in the dark - use a torch and stay on the joists if you go up at all. What you find up there (wet felt, wet timber, daylight visible) is useful information for the roofer.

If the weather forecast includes prolonged heavy rain before the roofer can attend, a temporary roof sheet or tarpaulin can be placed over the problem area - but only if someone can safely access that part of the roof at low pitch from a ladder without going onto the roof surface itself. Never attempt to work on a wet or steep roof. A tarpaulin fitted badly can itself cause damage if it lifts in wind, so weigh the risks carefully before using one.

What not to do yourself

Several well-intentioned DIY approaches cause more damage than the original problem. Avoid all of these:

• Do not apply mastic or silicone sealant to a flashing. It looks like a quick fix but bonds differently to the lead and masonry under thermal movement. Within a year or two it cracks away and you are back to the same leak - but now the roofer has to spend time removing the old sealant before the proper repair can start.
• Do not use expanding foam. It traps moisture, is extremely difficult to remove cleanly, and will complicate any subsequent repair. It is not a roofing material.
• Do not attempt to re-dress lead yourself. Lead looks soft and workable, but dressing it correctly requires the right tools, the right technique and knowledge of where the lead needs to go. Pushing it with a screwdriver or similar tool can crack it or open up a new gap.
• Do not pressure wash around the chimney or flashing. Water forced under a flashing edge at pressure can dislodge the lead and saturate mortar that was otherwise holding.
• Do not re-point the mortar chase yourself with standard builders mortar. The pointing in a lead flashing chase needs to be flexible enough to accommodate movement. Standard Portland cement mortar is too rigid and will crack away with the first frost.

Questions to ask when you call a roofer

Getting the right information upfront helps you make a good decision. When you call, ask:

• Will you inspect the flashing and the surrounding area before quoting, or quote from the ground?
• What lead code will you use for this application?
• Will soakers be included where step flashing meets a chimney, or just cover flashing?
• How will the chase be sealed - mortar pointing or lead wedges and sealant?
• Will any disturbed tiles or slates be re-bedded as part of the job?

A roofer who is happy to answer these questions before starting the job is generally one who knows what they are doing. Vague answers about just "sealing it up" should give you pause.

Areas we cover near East Harling

We cover East Harling and the surrounding villages from our base in Thetford. Call us and we will confirm we can reach you.

Get a lead work survey for your East Harling property

If you have spotted a damp patch or can see a problem with a flashing from the ground, call Thetford Roofers. We will arrange to come out, inspect the roof properly and give you a clear price for the work before we start.