Hillside damp understood
Retained walls, half-buried ground floors and water running downhill towards a building need waterproofing, not just a damp proof course.
Damp proofing in High Wycombe
Damp proofingin High Wycombefor hillside homes
High Wycombe sits in a chalk valley with steeply sloping streets, and that geography drives much of the damp here. Free survey, honest diagnosis, fixed price, ten-year guarantees on treatment.
Free survey in High Wycombe and surrounding villages · 10-year workmanship and QANW insurance-backed guarantees
10 years
Company workmanship guarantee on damp treatment
10 years
QANW insurance-backed guarantee
£0
Survey, diagnosis and fixed-price quotation in High Wycombe
£2m
Public liability insurance held
Local coverage
Covering High Wycombe and the surrounding Chilterns
High Wycombe is at the northern edge of our regular coverage, reached along the M40 and A404 from Harrow, and we work across the town and the surrounding villages including Hazlemere, Downley, Totteridge, Sands, Booker, Loudwater, Flackwell Heath, Penn and Marlow.
The town's housing runs from Victorian and Edwardian terraces around the centre and the old furniture-trade districts, through large interwar and post-war estates on the valley sides, to modern development and converted flats. Many of the older terraces are built on slopes, with one side of the house partially cut into the hill.
That hillside geometry is the single biggest local factor. Where a wall is retaining ground on one side, whether formally designed as a retaining wall or just built into the slope, it is in permanent contact with wet soil, and internal damp on that elevation is the predictable result.
The area also has a lot of chalk and flint construction, rendered elevations and older solid walls, all of which need repairs matched to the material rather than a standard specification.
Areas we cover within High Wycombe
- High Wycombe town centre
- Hazlemere
- Downley
- Totteridge
- Sands
- Booker
- Flackwell Heath
- Loudwater
- Tylers Green
- Penn
- Marlow
- West Wycombe
Property types we work on
Victorian and Edwardian terraces on sloping plots, interwar and post-war estate housing, rendered and flint village property, and converted flats.
Common High Wycombe requests
Damp on earth-retaining elevations, wet cellars and under-stairs stores, failed render, and penetrating damp on exposed valley-side walls.
Hillside drainage
We look at levels, surface water routes and drainage before treating a wall, because on a slope that is often where the problem starts.
When you can reach us
- Monday8am – 8pm
- Tuesday8am – 8pm
- Wednesday8am – 8pm
- Thursday8am – 8pm
- Friday8am – 8pm
- Saturday8am – 1pm
- SundayClosed
Services in High Wycombe
Every service available across High Wycombe
Rising damp treatment
A failed damp proof course is diagnosed, treated with an accredited Sovereign or Wykamol system and replastered to a decoration-ready finish, priced as a fixed sum before any work starts, and guaranteed for ten years.
Rising damp treatment in High Wycombe
Penetrating damp treatment
Damp that worsens after rain is coming in from somewhere. We find the route: pointing, render, sills, gutters or roof detail; correct it, then repair the wall inside. Free survey, fixed price, no guesswork.
Penetrating damp treatment in High Wycombe
Damp surveys & diagnosis
Find out exactly what is causing the damp, what it takes to fix it, and what it costs, in writing, at a fixed price, with no charge for the visit and no obligation to proceed.
Damp surveys & diagnosis in High Wycombe
Structural waterproofing & tanking
Below-ground rooms need a waterproofing system, not a coat of damp-seal paint. Membrane and cementitious tanking specified to suit the structure, installed as an approved Sovereign and Wykamol contractor, with a free survey and a fixed price.
Structural waterproofing & tanking in High Wycombe
Plastering
The replaster is half of any damp repair. We remove contaminated plaster, apply the specified salt-retardant system and leave a flat, decoration-ready finish, as part of a fixed price, by the same contractor that treated the wall.
Plastering in High Wycombe
Rendering
Cracked, hollow or blown render holds water against your masonry. We identify why it failed, repair or renew it with a system suited to the substrate, and fix the damp it was causing inside.
Rendering in High Wycombe
Brickworks & repointing
Open joints and spalled brick faces are the most common route for penetrating damp. We cut out properly, repoint in a mortar matched to your brick, and replace masonry that has broken down.
Brickworks & repointing in High Wycombe
Brick stitching
Helical stainless bars bonded into the bed joints tie cracked brickwork back into one structure, a repair carried out from the outside, without rebuilding the wall, and finished so the crack disappears.
Brick stitching in High Wycombe
General building
Damp repairs rarely stop at the damp. We carry out the associated building work: masonry, render, plaster, joinery repairs and making good, so the job finishes with one contractor accountable for all of it.
General building in High Wycombe
Small refurbishment & remedial works
Treatment stops the damp; remedial work makes the room liveable again. Plaster, joinery, floors, decoration preparation and making good, completed by the contractor that did the specialist work, at a fixed price.
Small refurbishment & remedial works in High WycombeWhy choose us
Why High Wycombe homeowners use Charge Building Services
Free survey and honest diagnosis
You get a clear explanation of what is actually happening, including when the fix is drainage or an external repair rather than treatment.
Two ten-year guarantees
10-year company workmanship guarantee plus a separate 10-year QANW insurance-backed guarantee on damp treatment.
Approved Sovereign & Wykamol contractor
Accredited tanking, membrane and damp proofing systems installed to the manufacturer's specification.
Repairs suited to old walls
Flint, soft brick and rendered elevations repaired with compatible materials rather than hard cement that traps moisture.
Fixed price, fully insured
Written fixed-price quotation, 50% deposit and 50% on completion by bank transfer, £2,000,000 public liability insurance.
Local damp problems
Why High Wycombe properties get damp
The valley setting is the defining factor. Streets run up steep chalk slopes, so a great many properties have ground higher on one side than the other. Any wall holding back soil is subject to lateral water pressure, and standard damp proofing will not control that.
The building stock adds the familiar problems: ageing slate and bitumen damp proof courses, bridged interwar cavities, failed render on exposed valley-side elevations, and reduced ventilation in houses that have been reglazed and insulated.
Earth-retaining walls
Where a wall holds back ground on the uphill side, water arrives under pressure and produces persistent damp that needs structural waterproofing.
Surface water running downhill
Rain running down steep streets and gardens collects against walls where drainage is inadequate or gullies are blocked.
Failed DPCs in older terraces
Slate and bitumen damp proof courses in town-centre terraces have reached the end of their life, producing tide marks and salting.
Exposed valley-side elevations
Walls facing the prevailing weather across the valley take heavy driven rain, and cracked render or eroded pointing lets it through.
Cellars and under-stairs stores
Part-buried stores in sloping-site houses are often wet and need tanking or a cavity drain membrane before they can be used.
Condensation in upgraded homes
New windows, insulation and blocked flues cut ventilation, and moisture condenses on the coldest surfaces as black mould.
Our process
The same five steps on every job in High Wycombe
Free survey and diagnosis
We inspect the property, identify the actual cause of the damp and explain it in plain terms. No charge, no obligation.
Fixed-price written quotation
A clear fixed price for the specified works, built around your property, never a day rate.
Works carried out
Accredited Sovereign and Wykamol systems installed, walls replastered and the area made good. 50% deposit, 50% on completion by bank transfer.
Verification and making good
Treatment checked for continuity, plaster left flat and decoration-ready, and the area cleaned down.
Guarantees issued
A 10-year company workmanship guarantee plus a 10-year QANW insurance-backed guarantee on damp treatment.
In detail
Damp proofing across High Wycombe in detail
Retaining walls and structural waterproofing
The most characteristic High Wycombe job is an internal wall that is permanently damp because the ground outside is higher than the floor inside. No injected damp proof course will solve that, because the water is arriving laterally under pressure rather than rising by capillary action.
The correct approach is structural waterproofing: either a cementitious tanking system bonded to sound masonry to resist water as a barrier, or a cavity drain membrane that accepts water and directs it to a perimeter drainage channel and then to a gravity drain or a sump and pump.
Both are installed as accredited systems, with the junctions, penetrations and floor-to-wall returns detailed carefully, those details are where waterproofing fails. Waterproof paint applied to a retained wall will peel, every time.
Drainage and external levels on slopes
Before specifying internal work we look at where the water is coming from. On a steep site that often means surface water crossing a garden or drive and arriving at the house, a blocked or missing gully, an undrained patio, or ground built up above the damp proof course.
Correcting levels, forming drainage channels, adding land drainage upslope and repairing gullies and rainwater goods can reduce the load on a wall dramatically, and sometimes removes the need for internal work entirely. We will tell you when that is the case.
Rising damp treatment in High Wycombe terraces
In the older brick terraces around the town, genuine rising damp is common where the original DPC has failed: an even tide mark, salt deposits, hollow plaster and soft skirtings.
Treatment is an injected chemical damp proof course using accredited Sovereign or Wykamol systems, followed by removal of salt-contaminated plaster and salt-retardant replastering. Without the replaster, hygroscopic salts keep the surface damp no matter how well the DPC performs.
Render, flint and brickwork repairs
Exposed elevations here take a lot of weather, and render failure is a frequent cause of penetrating damp. We cut out debonded and cracked render, repair or renew it with a suitable system, repoint in an appropriate mix, replace spalled brick and reinstate sill and drip details.
Where masonry has cracked, through movement on the chalk, at extension junctions or over openings, helical brick stitching restores continuity and closes the water path without rebuilding the wall.
Coverage around High Wycombe
As well as High Wycombe we cover the wider Buckinghamshire area, Marlow and the Chiltern villages, Slough, Middlesex and Harrow, Watford, London, West London and Surrey.
Calls are answered Monday to Friday 8am to 8pm and Saturday 8am to 1pm. Tell us if a sale, remortgage or tenancy start depends on the report.
Questions
Damp proofing in High Wycombe, common questions
Do you cover High Wycombe and the surrounding villages?
Yes: the town centre, Hazlemere, Downley, Totteridge, Sands, Booker, Loudwater, Flackwell Heath, Penn, Tylers Green, West Wycombe and Marlow.
How quickly can you reach High Wycombe?
It is a run along the M40 and A404 from Harrow. Calls are taken Monday to Friday 8am to 8pm and Saturday 8am to 1pm and surveys are arranged around your availability.
What does damp proofing cost in High Wycombe?
Sloping-site work varies a lot, from drainage correction to full structural waterproofing, so we survey free and quote a written fixed price for the actual scope.
Do you attend urgent damp problems in High Wycombe?
Active water ingress is prioritised for survey within our working hours of Monday to Friday 8am to 8pm and Saturday 8am to 1pm.
The ground outside is higher than my floor and the wall is always damp; what is needed?
That is lateral water pressure, not rising damp. It needs structural waterproofing; cementitious tanking or a cavity drain membrane with drainage, plus attention to external levels and drainage.
Will an injected damp proof course fix a retaining wall?
No. A chemical DPC addresses moisture rising by capillary action, not water pushing through a wall from higher ground. We will tell you that at survey rather than sell you the wrong treatment.
Can you repair failed render on an exposed elevation?
Yes: cutting out the failed areas, repairing or renewing the render with a suitable system, and reinstating details that shed water clear of the wall.
Is the work guaranteed?
Damp treatment carries a 10-year company workmanship guarantee plus a separate 10-year QANW insurance-backed guarantee. Building works carry a 6-month workmanship guarantee.
Are you insured?
Public liability insurance is held to £2,000,000.
Is the survey free in High Wycombe?
Yes: survey, diagnosis and written fixed-price quotation, with no obligation.
Free survey
Book a free damp survey in High Wycombe
Tell us the postcode and whether the ground outside is higher than the floor inside; that one detail usually tells us which way the job will go. We will survey and quote a fixed price.
- Free survey, diagnosis and written fixed-price quotation in High Wycombe
- 10-year company workmanship guarantee on damp treatment
- 10-year QANW insurance-backed guarantee
- Sovereign & Wykamol approved contractor
- £2,000,000 public liability insurance
Nearby areas
We also cover
Damp proofing in Buckinghamshire
Chalk hillsides, old brick-and-flint cottages and rendered village housing make Buckinghamshire damp its own discipline. Free survey, honest diagnosis, fixed price, ten-year guarantees on treatment.
View areaDamp proofing in Slough
Slough's post-war estates, interwar semis and older terraces each fail in their own way. Free survey and diagnosis, a written fixed price, and ten-year guarantees on damp treatment.
View areaDamp proofing in Watford
From Victorian cottages near the town centre to interwar and post-war estates on the edges, Watford damp has recognisable causes. Free survey, written fixed price, ten-year guarantees on treatment.
View area