We will have reduced staff on Friday 14th and Monday 17th April due to staff training. Orders will still be processed as normal. If you need to contact a member of staff urgently please contact us via WhatsApp.

We are closed Friday 9th June. All orders placed after 5pm Thursday 8th will be processed on Monday 12th June.






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Damp Proof Membranes

Damp-proof membranes are used to protect buildings against water and act as a barrier against moisture. They are used in nearly every construction project in the UK and are crucial for preventing dampness from getting into your insulation.

Our range of DPM membranes ranges in weight from 500g up to 2000g, so whether you are protecting against light rainfall or thunderous winds, you can do so in confidence.

Find a membrane that works for you; browse our product range below and benefit from next-day-delivery when you order before 12 pm (please see product page for more information on lead times.)


DPM Floor Membranes

DPM membranes are made from polyethylene and are essential for preventing residual construction moisture. They play a crucial role in ensuring the building’s longevity and stability. Simply cover the entire floor before you install your concrete layer and protect it against the outside elements.

Building structure

Any presence of moisture can pose a significant risk to structural integrity and longevity if it enters your building structure. Moisture will often result in mould and mildew, which when left, will spread throughout walls, insulation, and other materials, slowly destroying the building’s interior structure.

Using a damp-proof membrane will prevent water from penetrating the building structure, which increases lifespan and maintains the structural integrity of the building.

Building safety

Even the slightest of damp patches can result in mould and mildew which poses a significant health risk to the building’s occupants; with common respiratory issues such as asthma being affected.

Using a damp-proof membrane ensures enhanced indoor air quality and that the building is a safe and healthy indoor environment for anyone inside.

Without using a DPM, you risk causing long-term damage to the infrastructure of your building.

Trusted Supplier

UK Flat Roofing is a trusted supplier of damp-proofing solutions, with happy and trusting customers across the UK. We have nationwide delivery, and if you place your order before 12 pm, we'll dispatch it for delivery the next day, so you can start your construction project as soon as possible(please see product page for more information on lead times.) With over 35 years of experience, our expert team is on hand to help with any questions you may have; simply contact us on WhatsApp or visit our contact page.





Damp-proof membranes are an essential component in construction projects, to protect against residual construction moisture and rising dampness. They are crucial for maintaining the structural integrity and stability of the building and will increase its lifespan and indoor air quality.

Damp-proof membranes are regulated by British Standards, which specify the minimum thickness should be at least 1200 gauge. However, if you are undergoing a small renovation project and require a thin & temporary measure, 500 and 1000-gauge DPMs can be useful.

The benefits of using a damp-proof membrane include preventing moisture from penetrating the building structure, protecting against mould and mildew growth, increasing the lifespan of the building, maintaining its structural integrity, and enhancing indoor air quality.

Damp-proof membranes can be used in various applications, such as concrete slabs, below-ground structures, retaining walls, and more.

For the best protection against dampness, you should also use a damp-proof course such as EPDM rubber, which is placed within the brickwork to prevent dampness from capillary action.