Rising damp treatment in Lincoln

Where rising damp actually happens in Lincoln

Downhill Lincoln sits barely above the River Witham, on ground that the Sincil Dyke was cut to drain because it would otherwise be marshy for part of the year. The terraced streets of Sincil Bank, the West End and St Giles were built quickly in the Victorian period, usually with a slate damp proof course that is now well over a century old. On ground like this, with a water table that stays near the surface, moisture wicking up through brickwork is a real and checkable problem.

Uphill is a different story. The Cathedral quarter and Bailgate stand on the Lincolnshire Limestone of the Lincoln Edge, roughly fifty metres above the river. Ground moisture drains down through the porous stone rather than pooling under floors. When an uphill stone house shows a damp band at low level, the cause is more often penetrating moisture, condensation forming on cold hard render, or trapped moisture behind a cement patch than true rising damp.

What true rising damp looks like

• A tide mark or salt band on the wall, typically stopping within about a metre of floor level
• Fluffy white salt crystals on plaster as the wall dries after wet spells
• Skirting boards that feel damp or show decay at the bottom edge
• Damp confined to ground-floor walls, worse where external ground levels have been raised

Common look-alikes include a bridged damp course, where a flower bed, path or later render has been built up over the original slate line, and condensation pooling at the cold base of a wall. Both are cheaper to fix than a chemical damp course, which is exactly why the diagnosis needs to come first.

How the specialist approaches it

The vetted specialist this site introduces you to starts with measurement, not assumption: moisture profiling up the wall, checks on external ground levels, sub-floor ventilation and plumbing leaks, and where needed salt analysis to confirm ground moisture rather than rain or condensation. Only then is treatment quoted, which may include:

• Repairing or reinstating the physical damp proof course where it has been bridged
• Lowering external ground levels or improving drainage against the wall
• A remedial damp proof course injection where a slate course has genuinely failed
• Salt-contaminated plaster removed and replastered with an appropriate specification
• Clearing and adding air bricks so suspended floors can dry

What it costs

Costs depend on how many walls are affected, whether replastering is needed and how the property is built, so a fixed national price list would be misleading. The specialist provides a written itemised quote after inspection. There is no charge for being introduced through this site, and no obligation to accept the quote.