Loft Insulation Regulations 2024

by | Jan 23, 2024 | Loft Conversion | 0 comments

Loft Insulation Regulations

Are you prepared for the upcoming changes in loft insulation standards? As we approach 2024, homeowners are undoubtedly curious about what adjustments they must make to comply with the latest regulations. What steps must be taken to ensure your home is energy-efficient and meets the loft insulation requirements? 

So, in today’s guide, we’ll discuss the Loft Insulation Regulations 2024 UK; building regulations, minimum insulation thickness, and more. So, stay tuned as we break down the key components and implications of these regulations, ensuring you’re well-informed of the latest rules.

Why Is It Important to Follow Loft Insulation Thickness Regulation?

Keeping your home cosy while being environmentally responsible is a key focus, and that’s where loft insulation regulations 2024 UK come into play. These rules are regularly revisited to ensure they bring the most significant benefits to your living space and the world around you.

Approximately 25% of heating energy through uninsulated roofs affects your comfort and the wear and tear on essential components like boilers and pipes.

To align with government loft insulation regulation 2023 UK, your loft insulation board must have a minimum thickness of 270mm. However, experts advise using materials with a lower U-value, representing thermal conductivity. The lower this value, specifically aiming for the recommended 0.16 W/mK, the better the insulation can prevent heat from escaping.

Adhering to these regulations and expert suggestions is not just about staying warm. It’s also about making a positive environmental impact by reducing CO2 emissions.

How to Calculate Loft Insulation Requirements?

When insulating your loft, understanding how much insulation to buy is crucial. Start by assessing the current insulation in your loft as it has evolved over the years.

In the 1980s, 25mm to 50mm was common, rising to 200mm loft insulation with building regulations. Today, the recommended thickness for new builds is 270mm, which is also suggested for other properties, though it is not mandatory. Check your existing insulation, ranging from 25mm to 200mm, and consider insulation values to determine how much more you need. Modern materials can offer efficient thermal insulation without excessive thickness.

Coverage should extend across the entire floor to optimise loft insulation benefits with a gap around the edges for airflow. For a quick estimate, measure all rooms directly below, add them, allowing for wall widths, and overestimate to ensure extra insulation. Avoid pushing insulation into the eaves to maintain airflow.

Precise measurement becomes crucial if opting for a warm loft, where insulation extends to the underside of the roof, gable, and party walls. This complex job may be best left to professionals.

What are the Types of Loft Insulation?

When it comes to loft insulation, various options cater to different needs, providing energy efficiency and comfort. Here’s a breakdown of the main types:

Blanket Insulation

Commonly known as roll insulation, this type is widely used for lofts. It is typically made from glass mineral wool or stone wool. It’s easy to install, even in challenging spots, making it an excellent choice for spaces between joists.

Insulation Boards/Sheets

These loft floor insulation boards or sheets offer high thermal performance and are easily fitted between joists or rafters. Suitable for accessible lofts, they can be cut to size. Options include standard EPS boards and alternatives like wood fibre insulation in board form.

Loose Fill Insulation

Loose fill insulation is versatile and made from various materials such as fibreglass, cellulose, stone wool, or cork granules. Products with high recycled material content are environmentally friendly, and the ability to be blown into place makes it ideal for hard-to-reach lofts.

Spray Foam Insulation

Perfect for challenging areas or lofts with restricted access, spray foam insulation is applied in liquid form. While effective, it’s not recommended for DIY installation due to its specific application process.

Insulation Slabs

Also known as insulation batts, these slabs offer high thermal efficiency and sound insulation. It is typically made from glass, mineral, or sheep’s wool. They come in rigid slab forms and can be DIY-fitted between joists, roofs, or walls.

Loft board thickness

5 Essential Steps to Follow Before Insulating Your Home

Prioritise Your Safety

Before diving into insulation, prioritise safety by wearing protective gear like skin protection, a dust mask, and goggles. This will protect you from irritating insulation. Also, ensure your roof is in good shape to prevent any potential issues with dampness.

Clear the Loft

Remove any existing insulation unless compromised. More insulation is usually better; eco-friendly options like sheep’s wool blankets or wooden boards work well.

Calculate Insulation Size

Measure loft area, minimum insulation thickness, space between joists, and height. Insulation should match the top of the joists. If unsure, oversize and trim later.

Proper Installation

Lay insulation between joists, leaving a 25mm gap around the bottom of rafters for ventilation. Avoid squashing the insulation, ensuring they fit easily.

Additional Considerations

  • Pipes and tanks should be insulated.
  • Consider a second layer of insulation crossways over the joists for unused lofts.
  • Draught excluders around the loft hatch can prevent heat loss.

Confused by the new Loft Insulation Regulations 2024? Our blog explains everything. Get a free quote for compliant loft insulation today.

Elevate Comfort and Savings with PowerPillar’s Premier Loft Insulation Services! 

Are you tired of increasing energy bills and inconsistent room temperatures? Our skilled professionals will provide top-notch insulation solutions tailored to your specific needs. With PowerPillar, you can enjoy a cosy home in the winter and a cooler one in the summer while saving energy.

Don’t let your attic become a source of energy waste; contact us today and experience the transformative power of expert loft insulation!


Homeowners must comply with the updated Loft Insulation Regulations 2024 UK standards. Adhering to the minimum insulation thickness and utilising materials with lower U-values ensures a warm home and positively impacts the environment. We hope that reading the above calculation methods, types of insulation, and essential steps will help you make informed decisions. Stay informed, stay warm, and make a positive contribution to both your home and the environment.


Emmanuel Nwaebo

Emmanuel Nwaebo is the Managing Director at Powerpillar Ltd and has more than 25 years experience in building construction and renovations. He has a bachelor’s in Electronics and Electrical Engineering with certification in Construction Health and Safety Technician (CHST). With an experience in managing construction and renovation services for years, he is extremely passionate about property management and loves helping people find their dream property.

Get Your Quote Now


Powerpillar offers customised solutions tailored to meet the individual style preferences of its clients.

The Top 5 Benefits of Choosing a Custom Home Builder

Purchasing a home is usually one of the biggest investments for many people. There are two options when buying a new home for yourself and family. One is to buy a pre-built home, and the other is to purchase custom built house. Choose a custom home as it has many...

How a 3 Metre House Extension Creates Your Dream Cooking Space

Adding more living space to your home and increasing its value is a popular choice, and a home extension is a great way to accomplish this goal. Who wouldn't want more room to enjoy?  Are you tired of adjusting to a cramped kitchen, dreaming of a space where you can...

Top Bathroom Tile Trends in the UK for 2023

As we enter a new era of interior design, the bathroom serves as a blank canvas for expression and creativity. In the area of bathroom floor tiles, the United Kingdom experienced a stunning combination of classic beauty and nostalgic charm in 2023. This year's trends...

Integral Garage Conversion – An Ultimate Design and Cost Guide

Ever looked at your garage and thought, "Man, there should be a better use for this space?" Well, you are not alone. You have this integral garage, probably housing more dust than anything else. But hold on, there's a cool solution. You can go for an integral garage...

7 Brilliant Benefits of Glass House Extensions

Imagine sitting at a table, finding inspiration to write a new song, and amid the struggle, a bird flies by and gives you thousands of words. Imagine being a nature lover and wanting to spend time outdoors without going out. It might seem delusional at first, but let...

What size extension can i build without planning permission

Building extensions to your property can be an exciting prospect, offering additional living space, increased functionality, and potential value appreciation. However, the process of obtaining planning permission can be time-consuming and costly.  Luckily, in the UK,...

Under Garden Basement

Are you dreaming of expanding your living space without sacrificing your beautiful garden? Well, we have some exciting news for you! You can now build an under garden basement extension right under your garden! In this article, we'll walk you through the entire...

Basement Conversions in London

A basement conversion is a process of transforming the often-underutilised space beneath your property into a functional and habitable area.  This step-by-step guide explores the advantages of basement conversions, how to build a basement, all tailored to adhere to...