Damp Proofing Doncaster
CSRT & CSSW qualified surveyors · PCA approved · TrustMark registered
Rising damp, penetrating damp, condensation and timber decay treated across Doncaster, from the Victorian terraces of Balby and Hexthorpe to the interwar colliery estates at Bentley, Armthorpe and Rossington. We diagnose the cause before we quote for the cure.
Why damp is so common in Doncaster homes
Doncaster sits on the Humberhead Levels, some of the flattest and lowest ground in the north of England. That single fact drives most of the damp we treat here.
A high water table
Much of the borough lies barely above sea level with a water table close to the surface. Ground moisture is therefore under more pressure to move upward through masonry than it is in the hillier parts of South Yorkshire, so a damp proof course that has failed or been bridged shows itself faster and more severely. Cellars and ground-floor rooms are usually where it appears first.
Flood ground and lasting salts
Bentley, Fishlake, Toll Bar and Stainforth have all seen serious flooding, most recently in 2019. Where a property has taken water, salts drawn into the plaster continue attracting moisture from the air for years. Replastering over contaminated coats is the most common reason damp returns to a Doncaster home that has supposedly been fixed.
Colliery estates, cellars and winter condensation
Two further issues come up on Doncaster surveys again and again, and neither one is solved by injecting a damp proof course.
Interwar estate housing
Bentley, Armthorpe, Rossington, Askern and Edlington were built as colliery villages, largely between the wars. Many of those properties have solid or early cavity walls, minimal subfloor ventilation and airbricks that have since been blocked, rendered over or buried by raised garden levels. Restoring subfloor airflow often resolves more than any injected treatment would.
Airtight homes and black mould
Retrofitted insulation, replacement glazing and sealed chimneys have made Doncaster homes far more airtight. Moisture that used to escape now sits in the air, and every winter it condenses on the coldest surfaces, appearing as black mould in corners, on window reveals and behind furniture on external walls.
The three types of damp we treat in Doncaster
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 Doncaster the high water table makes this more common and more severe than in neighbouring towns, so accurate diagnosis matters. 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, defective rainwater goods and blocked or buried airbricks on estate housing. 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. Widespread across the borough's interwar estate housing where ventilation has been progressively sealed up. Resolved with improved ventilation alongside targeted mould treatment.
What happens when we survey your Doncaster 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 Doncaster 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 Doncaster and South Yorkshire.
Qualified surveyors covering Doncaster
All Dry is based in Barnsley, a straight run across on the A635 and M18, and we have been treating damp across South Yorkshire for more than 25 years. That means a surveyor who knows the local ground conditions and 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 Doncaster we cover
We work across the whole of Doncaster, including the town centre and all surrounding suburbs and villages.
- Bentley
- Armthorpe
- Bessacarr
- Balby
- Hexthorpe
- Cantley
- Wheatley
- Edlington
- Rossington
- Askern
- Adwick
- Conisbrough
- Mexborough
- Thorne
- Hatfield
- Stainforth
- Tickhill
- Bawtry
- Sprotbrough
- Warmsworth
- Finningley
- Dunscroft
- Woodlands
- Barnby Dun
Covering DN1 to DN12. Just outside Doncaster? We also cover Rotherham, Sheffield and Barnsley. See all areas we cover.
Damp proofing in Doncaster, common questions
The questions Doncaster 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 Doncaster 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.
It does. The borough sits on the Humberhead Levels with groundwater close to the surface, so moisture is under more pressure to rise through masonry than in hillier areas. A failed or bridged damp proof course tends to show itself sooner and more severely here, and cellars need a properly designed waterproofing system rather than a sealant.
Flood water carries ground salts into the plaster, and those salts keep drawing moisture from the air long after the structure itself has dried. If the property was replastered without stripping the contaminated coats back first, tide marks and damp patches usually return. We test for salts to confirm whether this is what you are dealing with.
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.
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 Doncaster 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 Doncaster 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