Damp Proofing

What is Damp Proofing?

Damp proofing is a building technique used to prevent moisture and water from infiltrating the interior of a structure. It typically involves the installation of a barrier or treatment that resists water penetration, primarily in walls and foundations.

Damp proofing methods can include the use of moisture-resistant materials, coatings, membranes, and the implementation of proper drainage systems. The primary goal of damp proofing is to protect buildings from moisture-related issues like mould, rot, and structural damage, ensuring a dry and habitable indoor environment.

It is a crucial step in construction and renovation projects to maintain the structural integrity and longevity of a building, especially in areas prone to high humidity or water exposure.

damp proofing

Types of Damp

There are several different types of dampness that can affect buildings, each with its own causes and characteristics. The three main types of dampness commonly encountered are:

Rising Damp

Cause: Rising damp occurs when groundwater is drawn up through the porous materials (like bricks and mortar) in a building’s walls or floors. It is often caused by a lack of, or failure in, a damp-proof course (DPC) or membrane.

Characteristics: Signs of rising damp include watermarks or tide marks on walls, flaking paint or plaster, and a musty odor. It typically appears on ground floors or in basements.

Read more about Rising Damp

Penetrating Damp

Cause: Penetrating damp is caused by water infiltrating a building from the outside due to issues like leaks in roofs, walls, or windows, damaged or blocked gutters, or defective external rendering.

Characteristics: Penetrating damp often presents as damp patches on walls or ceilings, typically following a rain event. These patches can be intermittent and may expand or recede with weather conditions.


Cause: Condensation occurs when warm, moist air comes into contact with cold surfaces, causing the moisture in the air to condense as water droplets. This often happens in poorly ventilated or insulated spaces.

Characteristics: Signs of condensation include water droplets on windows, walls, or ceilings, often accompanied by mold or mildew growth. Condensation issues are most common in bathrooms, kitchens, and poorly ventilated areas.

When is Damp Proofing required?

Damp proofing is typically required in various situations where moisture infiltration poses a risk to a building’s structural integrity and indoor environment. It is often necessary during construction or renovation projects to prevent water ingress into the building.

Damp proofing becomes essential in regions with high groundwater levels or heavy rainfall, where it safeguards against rising damp and lateral penetration of moisture through walls and foundations. It is also needed when signs of moisture-related issues, such as mould growth, musty odors, or visible dampness, become evident within a structure.

In older buildings, damp proofing may be required to upgrade outdated or ineffective moisture protection. Essentially, damp proofing is essential whenever there is a potential for moisture damage to the building or when moisture-related problems are observed, ensuring the longevity and habitability of the space.


How do I know if I need it?

Recognising the need for damp proofing involves paying attention to signs of moisture-related issues within a building. If you observe visible dampness, water stains, peeling paint, or mould growth on interior walls or ceilings, it’s a strong indication that moisture infiltration is a problem.

Musty odours and a feeling of dampness in the air can also be warning signs. Additionally, if you live in an area with a high water table, heavy rainfall, or your building’s foundation is in direct contact with the ground, you should consider damp proofing as a preventive measure.

In older buildings or during construction or renovation, it’s wise to consult with professionals such as Shield Preservation to assess the need for damp proofing and determine the appropriate solutions to prevent further moisture-related damage and create a dry and healthy indoor environment.

Why choose Shield Preservation?

Shield Preservation delivers a top-quality damp proofing service based on a systematic and comprehensive approach. It starts with a thorough evaluation of the specific moisture issues in the building to determine the most suitable damp proofing methods.

Proper planning is crucial, involving the selection of appropriate materials, coatings, or membranes tailored to the unique needs of the project. Skilled and precise execution ensures that the chosen methods are applied effectively to create a robust moisture barrier.

Stringent quality control measures, such as inspections and testing, should be in place to guarantee the effectiveness and longevity of the damp proofing solution. Effective communication with clients, clear timelines, and post-service support are also vital in delivering a top-quality damp proofing service, ultimately safeguarding the building from moisture-related problems and ensuring a dry, habitable environment.



We call you back

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed imperdiet libero id nisi euismodac, finibus vitae dui.


    Give us a call

    Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed imperdiet libero id nisi euismodac, finibus vitae dui rem ipsum dolor sit amet, consectetur adipiscing elit.
    01923 650262
    0121 2967907
    Midlands Office/Head Office:
    1 Hurley Lane, Hurley, Atherstone, Warwickshire, CV9 2JJ
    London Office:
    CP House, Otterspool Way, Watford, WD25 8HR