Damp Proofing Dewsbury
CSRT & CSSW qualified surveyors · PCA approved · TrustMark registered
Rising damp, penetrating damp, condensation and timber decay treated across Dewsbury, from the mill-workers' stone terraces of Ravensthorpe and Earlsheaton to converted mills and hillside housing at Thornhill and Chickenley. We diagnose the cause before we quote for the cure.
Why damp is so common in Dewsbury homes
Dewsbury was built by the woollen trade, and almost everything about its housing stock traces back to that. Two features in particular explain the damp we treat here.
Cleaned stone that now soaks up water
Most older Dewsbury property is solid-walled sandstone that spent a century turning black with mill soot. A great deal of it was cleaned during the 1970s and 1980s, often by abrasive blasting, which strips away the hard weathered outer skin the stone had formed over decades. The face left behind is markedly more absorbent, so walls that shed water for a hundred years now draw it in. It is one of the most common causes of penetrating damp in the town and one of the least recognised.
Solid walls and hard repointing
The mill-workers' terraces at Ravensthorpe, Savile Town, Westtown and Earlsheaton were built solid, with no cavity to interrupt water crossing the wall. Where those buildings have been repointed in dense cement rather than lime, moisture that gets into the stone can no longer escape through the joints and is pushed towards the inside face instead.
Mill conversions, hillsides and winter condensation
Two further issues come up on Dewsbury surveys repeatedly, and neither is solved by injecting a damp proof course.
Below-ground rooms and converted mills
Terraces built into the valley sides at Thornhill, Earlsheaton and Chickenley often have rear walls holding back earth, and the mill conversions along the Calder put habitable space below external ground level. In both cases the wall is below ground on one face, a damp proof course is irrelevant, and what is needed is a waterproofing system designed to BS 8102 by a CSSW qualified surveyor.
Airtight homes and black mould
Retrofitted insulation, replacement glazing and blocked chimneys have made Dewsbury homes far more airtight, particularly the smaller terraces where there was little spare ventilation to begin with. Moisture that used to escape now condenses on cold external walls, showing every winter as black mould in corners, around window reveals and behind furniture.
The three types of damp we treat in Dewsbury
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 Dewsbury it is usually a failed slate DPC in a Victorian stone terrace, or a DPC bridged by a raised yard, path or garden. Treated with a chemical DPC and salt-resistant re-plastering.
Water coming through the structure
Appears at any height and worsens after heavy rain. The most common problem in the town. Abrasively cleaned sandstone, cement repointing and defective rainwater goods on tall terraced elevations. 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. Common in the smaller mill-workers' terraces, where insulation and glazing upgrades have removed what little ventilation there was. Resolved with improved ventilation alongside targeted mould treatment.
What happens when we survey your Dewsbury 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 Dewsbury 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 Dewsbury and West Yorkshire.
Qualified surveyors covering Dewsbury
All Dry has been treating damp across Yorkshire for more than 25 years, including a great deal of work on traditionally built stone property in the Heavy Woollen district. That means a surveyor who can tell rain penetration from rising damp on a solid sandstone wall, 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 Dewsbury we cover
We work across the whole of Dewsbury, including the town centre and all surrounding suburbs and villages.
- Thornhill
- Thornhill Lees
- Ravensthorpe
- Savile Town
- Earlsheaton
- Chickenley
- Dewsbury Moor
- Westtown
- Hanging Heaton
- Staincliffe
- Scout Hill
- Shaw Cross
- Mirfield
- Batley
- Heckmondwike
- Liversedge
- Cleckheaton
- Birstall
- Gomersal
- Birkenshaw
- Whitley Lower
- Overton
- Middlestown
- Grange Moor
Covering WF12 to WF17. Just outside Dewsbury? We also cover Huddersfield, Wakefield, Leeds. See all areas we cover.
Damp proofing in Dewsbury, common questions
The questions Dewsbury 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 Dewsbury 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 is a real possibility and worth checking. Abrasive cleaning removes the hardened outer skin that sandstone develops over decades of weathering, leaving a much more absorbent face behind. Properties cleaned in the 1970s and 1980s often started taking in water afterwards. Where that has happened, a breathable water-repellent treatment and proper lime repointing usually resolve it, not an injected damp proof course.
Almost certainly because it was done in cement rather than lime. Sandstone has to release moisture as readily as it absorbs it. A dense cement mortar seals the joints, so water entering the wall can only escape through the stone face or into the building. On traditionally built property, lime mortar and breathable finishes are the correct repair.
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 Dewsbury 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 Dewsbury 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