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About Us

About Us

Established in 1987, RetroFit UK Ltd is a leading installer of external wall insulation and cladding. From the Head office in Cottenham, Cambridgeshire, we operate a nationwide team, providing external installation services for commercial clients and leading contractors.

RetroFit UK Ltd was bought by the SD Samuels Group in 2019. SD Samuels Ltd, a successful business that turns 27 years old in 2021, provides roofing and cladding services, working alongside us to form a seamless approach to combining the two businesses for the benefit of clients.

Now part of the SD Samuels Group, we can deliver a one-stop-shop for building envelope systems.
Working on projects of all sizes, RetroFit has customer service levels that create more clients and we retain our existing clients too!

We are driven to provide peace of mind for all customers and live by our promises.

For more information on the SD Samuels Group
SD Samuels Group


Our Core Values are the bricks that form the foundation of the group, how we act both internally amongst ourselves and externally with customers and suppliers.  They represent the regular behaviours of our best people, those who exemplify the culture of our company and what makes us special.

As a leadership team we have debated what are core values are and have agreed that the 5 following values best describe who we are, are the reason we are where we are today and will continue to help us build the business for the future.

1. Act with Integrity

This can be described as being reliable, trustworthy, respectful, honest, loyal, fair & reasonable.

Doing the right thing, in all circumstances even if no one is watching you.

2. Put the Company First

This can be described as putting the company and your work colleagues above your own needs.

Customers will never love a company until the employees love it first.

3. Do what we say

A person who does what they say they will do is a person who honours their commitments and keeps their promises.

Be on time, finish what we start, take personal responsibility

We are valued for what we do not what we will say we will do

4. Willingness to Learn

Willingness to learn is defined as a desire, wish or readiness to acquire new knowledge and develop. It means that a person does not want to stand in one place, wishes to be more qualified and keep up with the modern trends and tendencies

“The capacity to learn is a gift; The ability to learn is a skill; The willingness to learn is a choice.”

5. Uncompromising Safety

A safe working environment is at the heart of everything we do.  Our uncompromising approach to the safety of every employee, client, and supplier is a cornerstone of our culture.


To become the number 1 supplier of building envelope systems in the UK and an employer of choice within the construction sector, exceeding expectations of our clients and staff.

We want all of our staff to be as proud of working for RetroFit as RetroFit is of them. We will invest in, and support them, in all we do as we continue to deliver excellence to all our clients.

Leadership Team

144 years combined service

RetroFit, founded in 1987 was incorporated into the SD Samuels Group in 2019. Our joint mission is to be known for our integrity, exceeding all expectations from our employees and staff.

Fred Mills

Managing Director, SD Samuels Group

As an industry veteran, Fred Mills started from the bottom and climbed his way to the top. From working on the tools for American owned H.H. Robertson at the age of 21 to positions such as Contracts Manager and General Manager, Fred also obtained diplomas in Man Management and Psychology before eventually getting into his real passion of Quantity Surveying.

Fred eventually started his own business ‘Comet Roofing Ltd’ and then sold it in 1990 when he thought his cladding industry days were over. However, later that year, Fred’s son Wayne suffered a serious injury and became paralysed and wheelchair-bound. After a lengthy recovery and legal battle, both Wayne and Fred bought into S.D. Samuels and later became the major shareholders.

A proud family man, Fred enjoys watching his grandsons play football for their local teams as well as cheering on his four racehorses, one of whom, Ballyoptic, is a well-known winner.

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Mark Gibbs

Operations Director, RetroFit

With over 35 years’ experience in the construction sector, Mark initially worked on the tools in property and development, before climbing the ladder to become Operations Director of RetroFit UK Ltd.

A firm believer that happy and engaged employees/site personnel are the key to the success of all projects, Mark’s long career in construction has also seen him obtain diplomas in Management Studies, and he remains an active member of Chartered Institute of Building and Chartered Managers Institute.

Previously responsible for the successful delivery of construction projects in the high-end residential refurbishment and commercial fit-out sectors for many years, Mark brings a wealth of knowledge from H&S planning, to subcontractor selection and management, value reporting, and much more.

In his spare time, he likes to do as little as possible, but being a grandfather, who supports Tottenham FC and someone who also enjoys watching Formula 1, this isn’t always the case… So, when he wants to escape, you can usually find him fishing beside a river.

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Gary Bigg

Business Development Executive

The Group Sales Director for both SD Samuels and RetroFit UK Ltd with a proven track record for product and project procurement of high-quality Roofing and Cladding to the construction market, I am responsible for providing a one-stop-shop for building envelope systems.

Gary’s track record in both product and project procurement, evaluating, analysing requirements and formulating plans have culminated in the successful management and delivery of numerous high value projects across the Industrial, commercial and public sectors.

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Paul Webb

Senior Contract Manager

A highly skilled Contract Manager that started on the tools, Paul has a full in-depth knowledge of the systems and provide quality construction services for cladding, specialist renders and external insulation with RetroFit UK Ltd.

Paul is committed to ensuring his clients receive quality construction services at a fair price for cladding, specialist renders and external insulation and roofing.

With a track record in both product and project procurement, evaluating, analysing requirements and formulating plans, Paul’s career has culminated in the successful management and delivery of numerous high value projects across the Industrial, commercial and public sectors.

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