Description
Damp Proof Course (DPC) – 300mm Wide x 30m – Pack of 3 Rolls
Help protect brickwork, blockwork and masonry against rising damp and ground moisture with this 300mm Wide Damp Proof Course (DPC), supplied as a convenient pack of 3 x 30 metre rolls.
Designed for installation within brick and block walls, this durable and flexible waterproof DPC creates a continuous moisture barrier that helps prevent ground moisture travelling upwards through porous masonry materials.
With a versatile 300mm width, this damp proof course is ideal for a wide range of wall, cavity, foundation and general building applications where a reliable moisture barrier is required.
300mm Wide Damp Proof Course
A correctly installed Damp Proof Course is an important part of protecting buildings against rising damp.
Installed horizontally within masonry, the DPC creates a waterproof barrier designed to interrupt the upward movement of moisture through bricks, blocks and mortar.
For customers searching for 300mm damp proof course, 30m DPC roll, wide damp proof course, or DPC membrane for brick and block walls, this three-roll pack provides a practical solution for domestic and trade building projects.
Product Details
- Product type: Damp Proof Course (DPC)
- Roll width: 300mm
- Roll length: 30m
- Pack quantity: 3 rolls
- Total linear length: 90m across 3 rolls
- Thickness: Approximately 0.4mm
- Weight: Approximately 380g/m²
- Surface: Serrated diamond-cut finish on top and bottom
- Watertightness: Greater than 2kPa
- Low-temperature resistance: Down to approximately -25°C
- Fire classification: Class F
- Durable and flexible
- Alkali resistant
- Non-hazardous
- Designed for brick and block masonry
- Suitable for horizontal damp isolation
Helps Prevent Rising Damp
Rising damp occurs when moisture from the ground travels upwards through porous construction materials such as brickwork, blockwork and mortar.
Without a suitable moisture barrier, this damp can eventually reach internal wall finishes and contribute to a variety of building problems.
Installing a suitable DPC within the masonry helps interrupt this upward moisture movement.
A correctly installed damp proof course can help reduce the risk of:
- Rising damp
- Damp patches on walls
- Moisture penetration
- Mould growth
- Mildew
- Fungal residues
- Damaged plaster
- Peeling paint or wallpaper
- Moisture-related deterioration of masonry
Versatile 300mm Width
At 300mm wide, this DPC is a useful intermediate size suitable for many common building details.
It provides greater width than standard narrow DPC rolls while remaining easy to handle and cut on site.
Typical applications can include:
- Wider masonry walls
- Cavity wall details
- Foundation details
- Wall junctions
- Structural damp-proofing details
- General building applications
- Areas requiring additional DPC coverage
The roll can also be trimmed where required to suit specific construction details.
Pack of 3 x 30m Rolls
Each pack contains 3 individual rolls, with every roll measuring 300mm wide x 30m long.
That provides a total of 90 linear metres of damp proof course per pack.
The three-roll pack is particularly useful for:
- House extensions
- New-build projects
- Garages
- Workshops
- Long masonry runs
- Multiple walls
- Property renovation
- Trade construction projects
Having three rolls available also provides additional material for overlaps, corners and detailed areas.
Serrated Diamond-Cut Surface
This damp proof course features a serrated diamond-cut texture on both the upper and lower surfaces.
The textured finish helps the DPC grip within the mortar bed, reducing the risk of the membrane slipping while bricks or blocks are being positioned.
Benefits include:
- Improved mortar grip
- Better installation stability
- Reduced membrane movement
- Easier positioning of brickwork
- More secure placement within the wall
This makes the DPC particularly practical for permanent installation within masonry construction.
Suitable for Brick & Block Walls
This DPC is designed for horizontal anti-damp isolation within brick and block construction.
It can be incorporated into a wide range of wall systems to create a continuous moisture barrier.
Typical applications include:
- Brick walls
- Concrete block walls
- Cavity walls
- External walls
- Internal masonry walls
- House extensions
- Garages
- Workshops
- Garden buildings
- New-build properties
- Refurbishment projects
Durable & Flexible Construction
A damp proof course must be durable enough for permanent installation while remaining flexible enough to work with during construction.
This DPC combines both qualities.
Its flexible construction makes it straightforward to:
- Roll out
- Position
- Cut
- Form around corners
- Fit around junctions
- Adapt to different wall details
while maintaining the durability required for long-term moisture protection.
Alkali Resistant
Mortar and cement-based building materials are naturally alkaline.
Because DPC remains permanently incorporated within masonry, resistance to alkaline conditions is important.
This damp proof course is specified as alkali resistant, helping it remain suitable for long-term contact with mortar, brick and block construction.
Watertight at Greater Than 2kPa
The DPC has a specified watertightness greater than 2kPa, helping it provide an effective barrier against moisture when correctly installed.
Continuity is essential for good damp protection.
Particular care should be taken around:
- Corners
- Wall junctions
- Door openings
- Window openings
- Changes in level
- Service penetrations
- Overlapping sections
to avoid leaving gaps that could allow moisture to bypass the barrier.
Low-Temperature Resistance to -25°C
This damp proof course is designed to resist temperatures down to approximately -25°C.
This helps maintain flexibility during cold-weather storage and installation conditions.
Ideal For
The 300mm Wide Damp Proof Course is suitable for a wide range of building applications, including:
- New-build houses
- House extensions
- Garages
- Workshops
- Garden rooms
- Outbuildings
- Brick construction
- Block construction
- Cavity wall details
- Foundation details
- Property refurbishment
- Masonry repairs
- General building projects
DPC Installation
Correct installation is essential for creating an effective moisture barrier.
When installing:
- Ensure the mortar bed is level and properly prepared
- Lay the DPC flat without unnecessary folds or creases
- Make sure the membrane covers the required wall width
- Maintain continuity around corners and junctions
- Allow suitable overlaps where separate sections meet
- Avoid puncturing or damaging the membrane
- Bed the DPC securely into the mortar
- Connect adjoining damp-proofing systems correctly where required
- Follow the project specification and applicable building requirements
A continuous DPC is important because gaps or damaged sections may allow moisture to bypass the barrier.
DPC vs DPM – What’s the Difference?
A Damp Proof Course (DPC) and a Damp Proof Membrane (DPM) both protect buildings against moisture, but they are normally used in different areas.
A DPC is generally installed horizontally within walls to prevent moisture travelling upwards through brickwork or blockwork.
A DPM is usually supplied as a much wider sheet and installed beneath concrete floors and slabs.
In many construction projects, the two systems are connected to create a continuous moisture barrier.
Connect the DPC to the Floor DPM
Where a building also incorporates a floor Damp Proof Membrane, the wall DPC and floor DPM may need to be correctly connected.
Maintaining continuity between the two systems helps reduce the risk of ground moisture finding a route around the damp-proof barrier.
Always follow the relevant construction detail and project specification when connecting DPC and DPM systems.
Suitable for New Builds & Refurbishment
The 300mm Wide DPC is suitable for both new construction and appropriate refurbishment work.
It is particularly useful when:
- Constructing new brick or block walls
- Building an extension
- Constructing a garage
- Completing cavity wall details
- Rebuilding damaged masonry
- Improving existing damp-proofing
- Carrying out foundation work
- Completing property renovation
Why Choose 300mm Wide Damp Proof Course?
- Versatile 300mm Damp Proof Course
- 30m length per roll
- Supplied as a pack of 3 rolls
- Total 90 linear metres per pack
- Approximately 0.4mm thick
- Approximately 380g/m²
- Serrated diamond-cut surface on both sides
- Helps protect against rising damp
- Designed for brick and block masonry
- Watertight at greater than 2kPa
- Low-temperature resistance down to -25°C
- Flexible and durable
- Alkali resistant
- Non-hazardous
- Suitable for cavity and wider wall details
- Ideal for domestic and trade construction
- Suitable for new-build and refurbishment projects
Choose Damp Proof Course 300mm Wide x 30m – Pack of 3 Rolls for a durable, flexible and reliable waterproof barrier designed to help protect brickwork, blockwork and masonry against rising damp and ground moisture.
