Picking the right damp proof membrane for the job is crucial. It doesn’t just impact the construction itself, but it’s vital to consider the damp proof membrane price for any build.

In this article, we outline the different thicknesses available and what membrane is right for you.

What is DPM?

DPM stands for ‘damp proof membrane’. As the name suggests, DPM is a membrane-like material designed to protect structures from potential damp.

Damp proof membrane is usually made of plastic material, such as polyethylene. Plastic is notoriously long-lasting and resistant to moisture, helping to protect other elements such as brickwork.

Another common type of damp proofing is known as damp proof course or DPC. DPC does a slightly different job as it’s designed to help combat inside walls, whereas DPM is normally used in floors.

When should DPM be used?

Damp proof membranes can and should be used across many areas of construction, particularly in buildings that could experience issues with damp.

A damp proof membrane will commonly be laid during the construction of a concrete floor in a new build to protect the floor from rising damp.

UK Requirements for DPM Thickness

The use of damp proof membrane in construction is regulated by British Standards, which state that the sheet should be at least 1200 gauge (or 300 micrometres).

Using a thinner sheet could mean your building doesn’t comply with regulations, and it can be a costly fix, so 1200 is always recommended.

It is possible to get DPM sheets with a larger thickness than 1200 gauge. While there are some specific circumstances where this could be useful, generally, 1200 is enough for most jobs. Remember to check what is specified for your build with the architect or a structural engineer, or see what the local authority requires.

Choosing the Right Membrane for your Job

Making sure you have the right product for your needs is essential. DPM and DPC are just a few of the building membranes available, and each has its advantages.

Damp Proof Membranes

As mentioned earlier, DPM and DPC are designed to prevent damp and are commonly used in walls or floors.

Gas Membranes

Gas membranes are designed to stop the ingress of harmful gases such as carbon monoxide and radon into living spaces.

Whether you need a gas membrane depends on the building’s conditions (for example, if it’s a factory) or contamination in the surrounding area.

Vapour Membranes

Vapour membranes have many similarities with DPM. While damp proof membranes are designed to stop water from passing through, vapour barriers have the added feature of preventing water accumulation due to factors such as condensation.

A vapour barrier is a common feature in timber constructions and can be used within floor, wall and roof constructions.

Tanking Membranes

Tanking membrane is, again, similar to damp proof membranes. However, tanking is designed to provide unbeatable, heavy-duty water protection for particularly at-risk locations, such as basements.

Tanking membrane is often considerably thicker than DPM or DPC and is more expensive as a result.

Here at Fastbuild, we offer an unbeatable selection of membranes at great prices. To find just what you need for your next job, why not browse our range today?

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