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18mm MDF Sheets

Cut to size, fast UK delivery.

18mm MDF Sheets

Order your MDF boards online.

Most Purchased 18mm MDF Boards

MDF Boards
Offer
MDF Boards, MDT-MDF
Medite Premier MDF
No grain
Size: 2440 x 1220 mm
Thickness: 3, 4, 6, 9, 12, 15, 18, 22, 25, 30, 36 mm
quick view MDT-MDF
MDF Boards
Offer
MDF Boards, FNS-MRMDF-H
Finsa Hidrofugo MR MDF
No grain
Size: 2440 x 1220 mm
Thickness: 6, 9, 12, 15, 18, 22, 25, 30, 36 mm
quick view FNS-MRMDF FNS-MRMDF
MDF Boards
Offer
MDF Boards, MDT-MRMDF
Medite MR MDF
No grain
Size: 2440 x 1220 mm
Thickness: 6, 9, 12, 15, 18, 22, 25, 30, 36 mm
quick view MDT-MRMDF MDT-MRMDF
MDF Boards
Offer
MDF Boards, MDT-PRMRMDF
Medite Primed MR MDF
No grain
Size: 2440 x 1220 mm
Thickness: 18 mm
quick view Medite MDT-PRMRMDF
MDF Boards
Offer
MDF Boards, MDT-EXTMDF
Medite Exterior MDF
No grain
Size: 2440 x 1220 mm
Thickness: 12, 18, 25 mm
quick view MDT-EXTMDF MDT-EXTMDF
MDF Boards
Offer
MDF Boards, MDT-TRIMDF
Medite Tricoya Extreme MDF
No grain
Size: 2440 x 1220 mm
Thickness: 6, 9, 12, 15, 18 mm
quick view MDT-TRIMDF MDT-TRIMDF
MDF Boards
Offer
MDF Boards, MDT-ECOMDF
Medite Clear MDF
No grain
Size: 2440 x 1220 mm
Thickness: 12, 18 mm
quick view MDT-ECOMDF MDT-ECOMDF

Medium Density Fibreboards.

18mm MDF Sheets

18mm MDF sheets are a popular choice for furniture making, cabinetry and shelving where strength, consistency and a smooth finish are essential.

Made from high-density wood fibres bonded under heat and pressure, our MDF boards provide excellent rigidity, flatness and a clean surface ready for painting, veneering or laminating. Ideal for wardrobes, bookcases, cupboards and internal joinery, our MDF boards are available as full sheets or precision cut to size for your project.

Order MDF Sheets

What is Medium Density Fibreboard (MDF)?

Medium Density Fibreboard is an engineered wood sheet made from fine wood fibres combined with resin and compressed under high heat and pressure. This process creates a dense, flat, and consistent board with no knots or grain, making it easy to cut, machine and finish. This process creates a dense, flat, and consistent board with no knots or grain, making it easy to cut, machine and finish.

Key Characteristics:

  • Engineered wood-based sheet material.
  • Made from wood fibres, resin and wax.
  • Pressed under high temperature and pressure.
  • Smooth, knot-free, consistent density.

18mm MDF Cut to Size

Made-to-measure MDF.

Cut-to-Size MDF Boards

Order MDF cut to size and receive boards machined exactly to your specifications.

Using advanced panel-saw machinery, we cut MDF 18mm panels cleanly and consistently, helping to reduce material waste. Whether you’re ordering a single panel or a full project’s worth of MDF sheets, our cut-to-size service removes the need for additional cutting, handling and setup.

CNC cutting service is available, allowing for detailed shapes, repeated components and professional results. Simply enter your sizes, get an instant quote and buy your 18 mm Medium-Density Fiberboard cut to size online.

Types of 18mm MDF

Standard MDF

  • General internal use
  • Best for furniture and joinery

Moisture Resistant (MR) MDF

  • Suitable for kitchens and bathrooms
  • Not waterproof
  • Often identifiable by green dye

Fire Retardant (FR) MDF

  • Slows flame spread
  • Used in commercial or regulated environments

Veneered or Melamine Faced MDF

  • Pre-finished surface
  • Ideal for modern furniture and shelving

Most popular boards.

Medite

MEDITE is trusted by professionals for consistent quality, reliable performance and excellent machinability. Offering specialist boards for moisture resistance, low emissions and extreme outdoor durability, MEDITE is chosen when finish, longevity and compliance matter.

Premier MDF
MEDITE Premier MDF is a premium interior board designed for projects where quality and finish matter. It offers a smooth, even surface and consistent density that’s easy to machine and ideal for painting, laminating and fine detailing. Commonly used for furniture, shopfitting, doors and interior joinery.

MEDITE Premier is available in a wide range of thicknesses, including 18mm, giving you the flexibility to create precise, professional-looking results every time.
MR MDF
MEDITE MR MDF is a moisture resistant interior board designed for projects where durability in humid conditions is essential. It offers a smooth, even surface and consistent density, making it easy to machine and ideal for painting, laminating and detailed profiling.

MEDITE MR is commonly used for kitchen and bathroom furniture, architectural mouldings, skirting boards, window boards and interior joinery in moisture-prone interior environments.

Tricoya Extreme
MEDITE Tricoya Extreme MDF is a revolutionary, high-performance panel designed for projects that demand durability and stability. Engineered using a non-toxic acetylation process, it is resistant to rot, fungal decay and extreme environmental conditions, making it suitable for both internal and external use.

MEDITE Tricoya Extreme is ideal for a wide range of applications, including external doors, outdoor kitchens, planters, garden buildings, fences, signage, shopfronts, artistic installations and internal wet rooms. Its lightweight, machinable panels allow designers and fabricators to create innovative solutions where standard MDF would not be suitable.
Clear - No added formaldehyde
MEDITE Clear MDF is a no added formaldehyde (NAF) interior board designed for spaces where low emissions and environmental responsibility are essential. Engineered to maintain consistent strength and stability, it is ideal for applications where air quality and safety are a priority. MEDITE CLEAR is commonly used for cabinets, display cases, furniture, fixtures and mouldings in schools, hospitals, museums, laboratories and other sensitive interiors.

MEDITE Clear is available in a range of thicknesses including 18mm, allowing designers and fabricators to create precise results while minimising formaldehyde exposure.

Common Uses for 18mm MDF

This thickness provides reliable strength along with a smooth, workable surface suitable for many interior applications.

Furniture Carcasses & Cabinets

  • Strong yet manageable, this thickness provides enough rigidity and load‑bearing capacity for kitchen cabinets, wardrobes and drawer boxes without being overly heavy or difficult to handle. Its smooth, uniform surface also takes paint, laminate or veneer finishes consistently.

Shelving & Storage Units

  • For medium‑duty shelves holding books, kitchenware or decorative items, 18mm thickness offers a good balance of strength and minimal sag over typical spans when supported correctly.

Doors & Panels

  • As a panel material for interior doors, wall panels and wardrobe fronts, it resist bending and provides a stable substrate for edge banding or decorative mouldings.

Bookshelf made from 18mm MDF

Manufacturing process.

How Our MDF Boards Are Produced

Our MDF range features Medite products, a benchmark for quality and Europe’s most respected MDF manufacturer.

Medite MDF Manufacturing Process Video

Dimensions & properties.

Technical Specifications

Our MDF sheets are supplied as full panels, suitable for standard joinery and furniture applications, manufactured to a consistent 18mm thickness, with optional precision cut-to-size, CNC machining and panel edgebanding services.

  • Available Sheet Sizes:
    2440 × 1220mm
    2440 × 1525mm
    3050 × 1220mm
    3050 × 1525mm

  • Thickness: 18mm

  • Material Strength: High rigidity and stability, flat surface ideal for painting, veneering, or laminating

  • Cut-to-Size Service: Available

  • Edgebanding: Optional

  • CNC Machining: Available

  • Cutting Tolerance: Approximately 0.5–0.8mm

FAQs

How strong are 18mm boards?
Can this thickness be painted?
Can MDF boards be used in kitchens or bathrooms?
What makes this thickness different from other options?
What sheet sizes are available for this thickness?
Can 18mm MDF be used for load-bearing furniture?
Can I screw directly into MDF?

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