15mm Knauf Performance Plus Plasterboard 1200x2400mm

When it comes to insulating your home and achieving a smooth, finished wall surface, insulation plasterboard thickness plays a crucial role. This innovative building material combines the benefits of traditional plasterboard with a layer of high-performance insulation, offering a streamlined solution for enhancing thermal efficiency and creating comfortable living spaces.

However, with various thicknesses available, choosing the right insulation plasterboard for your project can be challenging. In this comprehensive guide, we’ll explore the factors that influence insulation plasterboard thickness, answer frequently asked questions, and provide you with the knowledge to make informed decisions for your specific needs.

Understanding Insulation Plasterboard

Insulation plasterboard, also known as insulated dry lining or thermal laminate board, is a composite product consisting of a plasterboard layer bonded to a layer of insulation material. This insulation layer is typically made from rigid foam, such as:

  • Polyisocyanurate (PIR): Known for its high thermal performance and slim profile.
  • Expanded Polystyrene (EPS): A cost-effective option with good thermal insulation properties.
  • Extruded Polystyrene (XPS): Offers high compressive strength and moisture resistance.

The combination of plasterboard and insulation in a single product offers several advantages:

  • Improved Thermal Performance: Reduces heat loss through walls and ceilings, leading to lower energy bills and increased comfort.
  • Streamlined Installation: Eliminates the need for separate insulation and plasterboard installation processes, saving time and labour costs.
  • Space-Saving Solution: Provides effective insulation without significantly increasing wall thickness, ideal for projects where space is limited.
  • Enhanced Sound Insulation: The insulation layer also contributes to reducing noise transfer, creating a quieter indoor environment.
  • Versatile Applications: Suitable for various projects, including new builds, renovations, and extensions, in both residential and commercial settings.

Factors Affecting Plasterboard Thickness

Choosing the right insulation plasterboard thickness depends on several factors:

  • Desired R-value: The R-value measures the thermal resistance of the insulation. Higher R-values indicate better insulation performance. The required R-value will depend on the building regulations in your area and the desired level of thermal comfort.
  • Space Constraints: If space is limited, you may need to choose a thinner insulation plasterboard to avoid significantly reducing room size.
  • Budget: Thicker insulation plasterboards generally cost more. Consider your budget when making your selection.
  • Type of Insulation Material: Different insulation materials have different thermal conductivities. PIR insulation, for example, offers higher thermal resistance per inch compared to EPS or XPS, so you may be able to achieve the desired R-value with a thinner PIR board.
  • Existing Insulation: If you are adding insulation plasterboard to an existing wall with some insulation, you may not need as thick a board to achieve the desired thermal performance.

Common Plasterboard Thicknesses

Insulation plasterboards are typically available in a range of thicknesses, with the most common options being:

  • 25mm: This thin insulation board is the thinnest option and is often used in situations where space is limited or where only a minimal increase in thermal performance is required.
  • 37.5mm: This thin insulation board is a popular choice for providing a good balance between thermal performance and space-saving.
  • 50mm: This thickness offers a significant improvement in thermal performance and is suitable for most applications.
  • 75mm: This is a thicker option that provides even greater thermal insulation and is often used in areas with high heat loss, such as external walls.

Thin Insulation Board: When Space is at a Premium

In situations where space is limited, such as in small rooms or narrow hallways, thin board insulation options are available. These boards typically use high-performance insulation materials, such as PIR, to achieve good thermal performance even with a reduced thickness.

Thin board insulations are a valuable solution for improving energy efficiency without compromising on valuable space. They are commonly used in:

  • Renovations and refurbishments: Where adding thicker insulation may not be feasible.
  • Small rooms and extensions: Where maximising space is a priority.
  • Internal wall insulation: Where a minimal increase in wall thickness is desired.

FAQs about Plasterboard Thickness

Q: What is the best insulation plasterboard thickness for my project?

A: The best insulation plasterboard thickness for your project will depend on the factors mentioned earlier, such as the desired R-value, space constraints, and budget. It is recommended to consult with a qualified insulation installer or our expert team at Online Insulation to determine the most suitable thickness for your specific needs.

Q: Can I install insulation plasterboard myself?

A: Although installing insulation plasterboard is generally easy, a qualified installer should handle the job, especially if you are unfamiliar with the process or dealing with complex wall constructions.

Q: What is the difference between tapered edge and square edge insulation plasterboard?

A: Tapered edge insulation plasterboard has sloped edges that create a recess when joined, making it easier to achieve a smooth finish with jointing compound. Builders typically use square edge insulation plasterboard with straight edges when covering joints with a decorative trim.

Q: Can I use insulation plasterboard in bathrooms and kitchens?

A: Yes, you can use moisture-resistant insulation plasterboard in bathrooms and kitchens. This board’s design withstands high humidity levels and prevents the growth of mould and mildew.

Q: What is the difference between insulation plasterboard and standard plasterboard?

A: Insulation plasterboard has an additional layer of insulation material bonded to the plasterboard, providing enhanced thermal performance compared to standard plasterboard.

Q: Can I use insulation plasterboard for soundproofing?

A: Yes, insulation plasterboard can contribute to soundproofing by reducing noise transfer. However, for optimal sound insulation, you may need to combine it with other acoustic solutions, such as acoustic mineral wool or soundproofing membranes.

Q: Where can I buy insulation plasterboard?

A: Insulation plasterboard is available from various retailers, including builders’ merchants, DIY stores, and online retailers like Online Insulation.

Need Help Choosing the Right Plasterboard Thickness?

At Online Insulation, we offer a wide range of insulation plasterboards in various thicknesses and with different insulation materials. Our expert team is available to provide guidance and support, helping you choose the best option for your project and ensuring you achieve optimal thermal performance and comfort in your home.

Browse our selection of insulation plasterboards online or contact us today for expert advice.