07787983683

Your Local Damp Proofing Company in Darlington

Experts in Damp Proofing, Dry Rot and Structural Repairs and Home Renovations –

  • Low Price Guarantee 100%
  • Efficiency 100%
  • 30 Year Damp Guarantee 100%
  • 5 Year Building Repairs Guarantee 100%

Your property is one of the biggest investments you’re ever going to make. Safeguarding that investment is more important than ever before, and that’s what Harris & Mulloy Plastering Damp Proofing & Building are here to do. We’ve over 60 years experience working in this specialist area, helping home owners improve their properties through renovations and restoring any damp and dry rot issues. As an independent family run company we take pride in our high standards of workmanship. Our company offers a comprehensive range of property preservation and maintenance services across Darlington and the surrounding areas which includes all remedial works after treatment.

Rising Damp Darlington


Rising damp is the process of water rising vertically up from the ground and travelling by capillary action through porous material such as bricks and mortar. This will cause the wall to become damp as hygroscopic salts travel into the brickwork and plaster. As water evaporates, these salts are deposited into the wall attracting more moisture from the atmosphere. image shows a property afflicated with rising damp in darlingtonAs the process continues the wall and surrounding area becomes more saturated and signs of rising damp will become evident such as crumbling of plaster and white tide marks appearing on a wall up to a height of around 1 metre. Problems such as dry rot, wet rot and wood boring beetle infestations are also more likely to occur as surrounding timbers become saturated. It is a slow process and can be present for many years before any sign of a problem appears. Rising damp will typically occur due to:

  • No damp proof course (DPC) as is commonly the case with older buildings
  • Deterioration and failure of the DPC over time
  • Changes in external ground levels meaning the DPC becomes bridged. For example if a new patio has been laid
  • Moisture travelling in between the wall and the render so bypassing the DPC.

Penetrating Damp Darlington


Penetrating damp is an all too common issue with the potential to seriously damage both the exterior and interior materials of a property. It is generally classified as water that finds its way from the outside in and it can occur at all levels of the building. This is unlike rising damp which occurs only at ground level.

image shows a property afflicted with penetrating damp in darlington

Why does penetrating damp occur?

Penetrating damp can occur for a number of reasons as follows:

  • Faulty rainwater goods ie blocked gutters, faulty downpipes
  • Roof defects such as missing roof tiles
  • Damaged pointing, cladding, flashing or render
  • Walls exposed to wind driven rain
  • Long periods of rain and heavy winds
  • Flood water saturating masonry
  • Ongoing and undetected leaks from pipes

Condensation Darlington


Condensation is caused by an imbalance of airflow, heating and ventilation resulting in a rise in relative humidity within the atmosphere of a property.

As warm air, which holds more water vapour than cold air, hits a cold surface such as a wall or window the air cools and is unable to retain all the moisture. The moisture it cannot hold is released and deposited in the form of tiny water droplets onto the cold surface.

Where does condensation appear?

Condensation can appear at any height, on almost any cold surface and where there is little movement of air most commonly windows, north facing walls, corners and behind furniture. This distinguishes it from rising damp, which almost never occurs at heights of more than 1.2 metres over external ground level and which is confined to walls that are in contact with the ground.  Unlike condensation, rising damp normally results in the brickwork or masonry, being of higher moisture content, than the plaster/render.

your local damp proofing company in darlington

How Can We Help with Damp Problems?

You will only get the best independent and most qualified advice from Harris & Mulloy Plastering Damp Proofing & Building , as we deliver a professional standard of service to both commercial clients and homeowners. We assess, diagnose and provide the best treatments for damp proofing in Darlington, solving any existing problems while preventing future issues from occurring. You can learn more about us and our services here.

Booking a Damp Survey

From your initial enquiry for damp proofing Darlington, you will be working with an experienced member of our team who will offer advice and co-ordinate your survey appointment. This is carried out by one of our qualified surveyors who will assess and diagnose all issues in the property before providing the right solution. Any recommendations and quotations for work are detailed in an Inspection Report. We are able to price of plan or complete tenders as necessary.

Carrying out Property Preservation Work

Our Contracts Manager oversees all work carried out by our team or operatives, maintaining the highest standards throughout every project. All teams are fully trained and skilled in damp proofing, and they use the latest methods and best materials with every solution. We cover all areas on the Darlington and work throughout the North East.

For More Information on Damp Proofing Services Darlington

You can find out more about the services and treatments we offer by visiting the rest of our website. You can also call us directly and speak to a member of our team regarding your damp concerns.

“I would like to recommend you on the quality of building work completed and for the fast and efficient time taken.  The property was left in wonderful condition.  Collin Smith, Director.  Smith & Dunn Ltd Surveyors and Valuers”