TLA – Thermal Lightweight Aggregate

What Is TLA? 

TLA (thermal lightweight aggregate) is a free-flowing, pourable insulation combining coated EPS beads with cement and water. Its free-flowing properties provide a faster and more efficient way of installing insulation, which makes it suitable for many different applications. At Co-Dunkall Ltd we are proud to be East Anglia’s only approved installers of this innovative product, and believe it to be truly re-defining in the world of construction.


The Benefits Of TLA – Free Flowing Insulation


TLA can be adapted for a variety of solutions to meet requirements on thickness, weight and thermal performance to name a few.


One team can install 1000m2 + per day allowing for increased productivity on site.

Zero Waste

When batched to the exact requirements for a specific project, TLA is a zero-waste product. No offcuts are produced or skips are required meaning a reduction in your waste management costs.

A2 Fire Classification

TLA has an A2 Fire classification meaning it has limited combustibility.

High Strength

TLA has a strength of 750KPa, meaning a thinner finishing screed is required.


Installed density as low as 130kg/m3 and in some cases can provide a solution up to 10 times lighter than traditional solutions

Rapid Drying Times

It dries at a rate of 1cm per day which is up to 10 times faster than alternative methods. With rapid drying times, follow on trades can work more quickly resulting in an improved build programme.

Reduced Thermal Bridging

Reduced risk of thermal bridging due to it’s enhanced Psi values. Insulates all areas with no voids.   




TLA is a high-performance pourable insulation. It can be laid directly on to compacted hardcore and provides enhanced U-Value and Psi-values compared with traditional floor build-ups of the same thickness. With a faster install, drying time of 48 hours and reduced risk of thermal bridging, TLA is a flooring solution with maximum efficiency.

Timber Frame

TLA is a cement based pourable insulation which provides a level base without camber. By replacing traditional floor systems with TLA, it is possible to save significant weight whilst still meeting the loading requirements of the floor. TLA has lightweight, thermal and acoustic benefits which can lead to savings on structural design.


The unique combination of strength and insulation forming this product reduces the layers required in roof design, and therefore materials needed. This not only saves you on the cost of materials but also waste management, time and labour costs.  Although this product is liquid in state, it can also be installed at varying depths and angles therefore allowing for falls.

Underfloor Heating 

Due to its void filling, free-flowing form, this creates a single continuous thermal layer, meaning no gaps down the sides for heat loss like with insulation. The robust platform provided by this product leads to more responsive heat up times resulting in lower energy bills for the end-user. This is aided by the EPS beads.


Why Co-Dunkall

Here at Co-Dunkall we are proud to be one of the only certified installers of this specialist product in the region. Our highly skilled, professional operatives will ensure your project is completed to the highest standard. All training for the installation of this product is provided by Energystore Ltd and is supplied via our very own Transmix lorry (approx. 20m3 per lorry, 60m3 per day).

10 Year Guarantee 

We offer a 10 year guarantee on TLA when purchased as part of our underfloor heating and screed package! Contact us for more details.

TLA Insulated Screed Gallery

Now Recruiting

We are looking for an enthusiastic individual to join our team of floor screed installers. Experience in this field is preferred however not essential as full training will be provided.

Please send your C.V and cover letter to, or contact us on 01953 488224 for more information