How Long Do Different Types of Insulation Last?

by Joe Fisher on June 14, 2024

When choosing insulation for your home, longevity is a key factor. Understanding how long different types of insulation last can help you make an informed decision. In this post, we'll explore the lifespan of various insulation materials, including PIR, Kingspan, drylining, glass wool, and more.


Floor Insulation

PIR Insulation: This rigid foam insulation, commonly used in floor applications, can last up to 50 years. Brands like Kingspan and Ecotherm are popular choices for their durability and efficiency.

EPS Insulation (Expanded Polystyrene): EPS is another long-lasting option, with a lifespan of around 30-50 years. It’s effective for both suspended and solid floors.

XPS Insulation (Extruded Polystyrene): Known for its strength and moisture resistance, XPS can also last up to 50 years, making it ideal for floor insulation.


Wall Insulation

Cavity Wall Insulation: Typically made from glass wool or foam, cavity wall insulation can last between 20-30 years. Proper installation is crucial to ensure its longevity and effectiveness.

Internal Wall Insulation: Using materials such as drylining or insulated plasterboard, internal wall insulation can last over 40 years. This type of insulation is great for improving thermal efficiency within the home.

External Wall Insulation: Often comprising EPS or mineral wool, external wall insulation can have a lifespan of 30-50 years, providing robust thermal protection.


Roof Insulation

Pitched Roof Insulation: Insulation materials for pitched roofs, such as glass wool or PIR boards, typically last 40-50 years. Brands like Kingspan and Xtratherm are renowned for their quality in this application.

Flat Roof Insulation: Flat roofs can benefit from durable materials like XPS or PIR, which also offer a lifespan of around 40-50 years. Proper maintenance of the roof itself can extend the insulation's life.


Acoustic Insulation

Acoustic Partition Roll (APR): Used to reduce noise between rooms, APR insulation made from materials like Rockwool can last up to 50 years, maintaining its acoustic properties effectively over time.

Acoustic Plasterboard: This specialised plasterboard helps in soundproofing and can last as long as the building itself if properly maintained.



Other Insulation Materials and Lifespans

Glass Wool: Common in loft rolls and cavity batts, glass wool insulation typically lasts around 40 years. It's a reliable choice for various applications due to its thermal and acoustic properties.

Sheet Materials (OSB, Plywood, Cemboard): Often used in conjunction with insulation for structural purposes, these materials can also contribute to insulation effectiveness. Their lifespan is generally tied to the overall structural integrity of the building, often lasting 40-50 years.

Accessories: Elements like vapour plasterboard, fire-resistant plasterboard, and moisture-resistant plasterboard are essential for specialised needs and can last over 40 years with proper care.


Insulation Thickness and Performance

Insulation thickness plays a significant role in its performance. Common thicknesses are between 25mm and 150mm.

Thicker insulation generally provides better thermal performance and can contribute to the material's longevity.



Choosing the right insulation for your home depends not only on thermal performance and cost but also on how long it will last. Materials like PIR, EPS, XPS, and glass wool offer substantial lifespans, often up to 50 years. Brands such as Kingspan, Ecotherm, and Rockwool provide high-quality options that ensure your home remains energy-efficient and comfortable for decades.

For reliable delivery and installation of these insulation materials, consult reputable suppliers and ensure proper installation practices to maximise their lifespan.