Damp Proofing Sheffield
CSRT & CSSW qualified surveyors · PCA approved · TrustMark registered
Rising damp, penetrating damp, condensation and timber decay treated across Sheffield, from stone-built terraces in Crookes and Walkley to cellar conversions in Kelham Island and 1930s semis in Woodseats. We diagnose the cause before we quote for the cure.
Why damp is so common in Sheffield homes
Sheffield's housing stock throws up damp problems you rarely see elsewhere in South Yorkshire, and the reason is mostly the ground the city is built on.
Sloping streets and bridged damp proof courses
Sheffield is built across steep valleys. On terraced streets in Crookes, Walkley, Hillsborough and Nether Edge, the pavement or neighbouring garden frequently sits above the internal floor level. Where external ground has been raised over the years by new paving, a raised patio or decades of soil build-up, the original damp proof course gets bridged and moisture tracks straight into the wall.
Porous local sandstone and solid walls
Much of Sheffield's pre-1920s housing is built from local Coal Measures sandstone, with solid walls and no cavity. The stone is porous, and once pointing softens or a gutter overflows, water moves through the wall rather than being stopped by it.
Cellars, conversions and winter condensation
Two further problems come up on Sheffield surveys again and again, and neither one is solved by injecting a damp proof course.
Rooms below ground level
Cellars are near-standard in Sheffield's Victorian terraces, and the mill and works conversions around Kelham Island and Neepsend put habitable rooms below external ground level. Water under pressure finds any weakness, so these spaces need a designed waterproofing system rather than a coat of damp-proof paint.
Airtight homes and black mould
Retrofitted insulation, replacement glazing and blocked chimneys have made Sheffield homes far more airtight. Moisture that used to escape now sits in the air. In high-occupancy properties, particularly the student and HMO stock around Crookesmoor, Broomhill and Ecclesall Road, that shows up every winter as black mould on cold external walls and around window reveals.
The three types of damp we treat in Sheffield
They look similar on the wall and they are treated completely differently. Getting this wrong is the single most expensive mistake a property owner can make, which is why every job starts with a survey rather than a quote.
Moisture drawn up from the ground
Tide marks up to about a metre, salt bloom in the plaster, damp skirtings and lifting floor coverings. In Sheffield it is usually a failed or bridged DPC in an older stone or brick terrace. Treated with a chemical DPC and salt-resistant re-plastering.
Water coming through the structure
Appears at any height and worsens after heavy rain. Common causes here are eroded pointing on exposed stonework, defective rainwater goods and blown render on gable ends. Treated by fixing the defect first, then making good internally.
Moisture the building cannot shift
Black spotting in corners, on window reveals and behind furniture, worst between October and March. Resolved with improved ventilation such as extract fans, trickle ventilation or a PIV unit, alongside targeted mould treatment.
What happens when we survey your Sheffield property
Every job begins with a damp survey carried out by a CSRT qualified surveyor. You get a written report and a clear recommendation, including the times we tell you no damp proofing work is needed.
Inspection
External ground levels, pointing, rainwater goods and DPC line, then a full internal inspection including the cellar.
Testing
Moisture meter readings, salt analysis where rising damp is suspected, and timber probing for rot and woodworm.
Report
A written report setting out the cause, the evidence behind the diagnosis and the recommended remedial work.
Quotation
An itemised, fixed-price quotation. No pressure, no obligation, and no work booked until you are ready.
Damp proofing treatments for Sheffield properties
We are registered Safeguard and Sovereign users, and all remedial work is carried out to PCA standards using methods appropriate to the construction of the building.
- Chemical damp proof course injection for failed or missing DPCs in stone and brick walls
- Salt-retardant re-plastering, the essential second half of any rising damp treatment
- Cellar tanking and cavity drainage membranes for below-ground rooms and basement conversions
- External pointing and render repairs to stop penetrating damp at source
- Ventilation and PIV systems as part of our approach to condensation control
- Timber treatment for wet rot, dry rot and woodworm in joists and floor timbers
What our customers say
Verified reviews from homeowners, landlords and letting agents across Sheffield and South Yorkshire.
Qualified surveyors, a short drive from Sheffield
All Dry is based in Barnsley, straight up the M1 from Sheffield, and we have been treating damp across South Yorkshire for more than 25 years. That means a surveyor who knows the local building stock, and a team you can still get hold of years after the work is finished.
- CSRT qualified surveyors
- CSSW qualified for structural waterproofing
- PCA approved contractor
- TrustMark registered
- Registered Safeguard and Sovereign users
- Guarantee Protection Insurance available
- Building Regulations compliant workmanship
- Reports accepted by lenders and surveyors
Workmanship is guaranteed on every job, and Guarantee Protection Insurance is available on all completed work.
Areas of Sheffield we cover
We work throughout the S postcode area, including the city centre and all surrounding suburbs and villages.
- Crookes
- Walkley
- Hillsborough
- Broomhill
- Nether Edge
- Sharrow
- Ecclesall
- Fulwood
- Dore
- Totley
- Woodseats
- Meersbrook
- Heeley
- Norton
- Gleadless
- Handsworth
- Darnall
- Firth Park
- Stannington
- Chapeltown
- Stocksbridge
- Mosborough
- Beighton
- Kelham Island
Covering S1 to S14, plus S17, S20, S21, S35 and S36. Just outside Sheffield? We also cover Rotherham, Doncaster, Barnsley and Wakefield. See all areas we cover.
Damp proofing in Sheffield, common questions
The questions Sheffield homeowners, landlords and buyers ask us most often.
It depends on how much wall needs treating, whether re-plastering is required and how easy the property is to access. A single wall in a terraced house is a very different job from tanking a full cellar, so we do not quote before we have seen the property. After the survey you get an itemised, fixed-price quotation, and the figure you are quoted is the figure you pay.
Yes. A proper survey takes time and produces a written report you can use, including with a mortgage lender or your own builder. The fee is refunded in full against the cost of the work if you go ahead with us. We would rather charge for an honest diagnosis than offer a free inspection that only ever concludes you need work doing.
Often it is something else. In Sheffield the most common misdiagnosis is condensation or a bridged damp proof course being treated as rising damp. Raised external ground levels, a leaking gutter or eroded pointing will all produce damp patches that look identical from the inside. That is why we test for salts and inspect the outside of the property before recommending any injection work.
In almost every case, yes. Cellars in Sheffield terraces sit below external ground level and cannot simply be sealed with paint. We use tanking systems or cavity drainage membranes with a sump and pump where required, designed by a CSSW qualified surveyor to BS 8102. This is also the first step in any basement conversion.
A chemical DPC and re-plaster to one or two walls is typically two to four days on site. Cellar waterproofing usually takes one to two weeks. New plaster then needs to dry before decorating, so allow around one month per 25mm of thickness. Most walls are ready to paint after four to six weeks using a breathable emulsion.
Regularly. With a large rental and HMO market across Sheffield, we handle damp and mould reports for landlords who need to demonstrate compliance with the Homes (Fitness for Human Habitation) Act and Awaab's Law. We can report directly to the agent and work around tenant access.
Yes. Our reports are produced by CSRT qualified surveyors and we are a PCA approved contractor, which is what lenders and homebuyer surveyors look for when a retention has been placed on a purchase. If you are buying in Sheffield and your survey has flagged damp, tell us and we will prioritise the appointment.
All workmanship is guaranteed, and Guarantee Protection Insurance is available on completed work. That means the cover stands even if the company ceases trading, and the guarantee is transferable to a new owner if you sell the property.
Get your Sheffield damp problem diagnosed properly
Book a survey with a CSRT qualified surveyor and get a written report, an honest diagnosis and a fixed-price quotation.
07973 748566Start Your Online Quote