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IKO Polimar Seal for Gutter Lining: A Corrosion-Resistant Solution

Gutter Repair Services

The Challenge

This job was typical example of what we see every day on commercial buildings that use plastisol coated steel box gutters. The Business Centre had heavy debris and plantation growing in the box gutters accumulated over the years. As a result of this the gutters would have corroded and leaked at the joints.

Our Solution – IKO Polimar Seal

Renewing the box gutters normally involves a lot of work. The fixings are generally situated under the first sheet, which is half sitting in the box gutter, and the sheet needed to be removed in order to get to the gutter fixings.

The simpler solution was to coat the internal part of the gutter using IKO Liquid Polimar Seal (Liquid Roofing). The work involves cleaning out the defective box gutter and treating the corrosive areas. Once the box gutter is clean and dry, we simply applied IKO Polimar Seal roller to the whole internal part of box gutter at an even specified applied rate.

The Result

The finished product? A waterproof, weather-resistant system that stands strong against rain and the elements. Plus, it comes with an IKO Liquid Polimar Seal Waterproofing Plc 5-Year warranty—because quality matters.

Why choose DVC Commercial Roofing Contractors?

DVC Commercial Roofing Contractors are a family run business founded in 1995. Handing over watertight buildings to our clients over the last 26 years has built us a strong reputation, based on reliability and value. We deliver the highest quality work, on time, and with expert knowledge every step of the way, from project inception right through to project completion.

We are a multifaceted roofing contractor with offices in Newcastle and Manchester, meaning we have the capacity to deliver any size project, anywhere in the United Kingdom.

For any roofing enquiries, please do not hesitate to contact us.

FAQ: Gutter Repairs

What problems are common with plastisol coated steel box gutters on commercial buildings?
Plastisol coated steel box gutters are widely used across commercial roofing systems, but over time they often suffer from debris accumulation, standing water, and corrosion. Leaves, dirt, moss, and even vegetation can build up inside the gutter channels.

Without roof regular maintenance or a roof survey, this trapped moisture can lead to joint failure, rust formation, and ultimately leaks that threaten the building envelope.

What was the main issue identified on this project?
During the roof inspection, we discovered heavy debris and plantation growth within the box gutters of the Business Centre. This had clearly developed over many years. The organic buildup had trapped moisture against the plastisol coated steel, accelerating corrosion and causing deterioration at gutter joints — a very typical scenario encountered by commercial roofing contractors.

Why is traditional box gutter replacement often complicated?
Conventional gutter renewal can be extremely disruptive and labour-intensive. In many commercial roof installation designs, gutter fixings are located beneath the first roof sheet, which partially sits within the gutter.

Accessing these fixings typically requires removing roofing sheets, increasing project time, cost, and risk. For occupied commercial buildings, this approach can create unnecessary disruption.

What solution did DVC Commercial Roofing Contractors recommend?
Rather than pursuing a full commercial roof replacement or gutter removal, we recommended coating the internal gutter surfaces using the IKO Liquid Polimar Seal system.

This liquid roofing solution allows us to restore waterproofing performance without dismantling the roof structure, making it a highly efficient commercial roof repair strategy.

How does IKO Liquid Polimar Seal simplify gutter renewal?
IKO Liquid Polimar Seal is a cold-applied liquid roofing membrane designed to create a seamless, waterproof barrier. Because it is applied directly to the prepared substrate, there is no need for invasive strip-out works.

The system adapts to complex shapes, joints, and detailing commonly found in box gutters. This makes it ideal for projects where the goal is to fix commercial roofing defects quickly and effectively.

What preparation work was required before application?
Proper preparation is essential for long-term performance. Our team first removed all debris, moss, and vegetation from the defective box gutters. Corroded sections were treated, and the surfaces were thoroughly cleaned and dried. This ensured optimal adhesion of the liquid membrane — a critical step in any professional felt roofing or liquid roofing application.

How was the IKO Polimar Seal system applied?
Once the gutter surfaces were fully prepared, IKO Polimar Seal was applied by roller across the entire internal area of the box gutters. The material was installed at a carefully controlled, even specified coverage rate to guarantee consistent thickness and waterproofing integrity. The result is a seamless membrane free from joints or overlaps.

What advantages does liquid roofing offer over traditional repairs?
Liquid roofing systems eliminate many failure points associated with mechanical joints, seams, and fixings. They provide excellent flexibility, weather resistance, and durability. For commercial roofing and industrial roofing applications, this means reduced maintenance needs and improved long-term reliability. It is often a smarter alternative to disruptive industrial roof replacement works.

What was the final outcome of the project?
The completed system delivered a fully waterproof and weather-resistant gutter lining capable of withstanding harsh UK weather conditions. The gutters were effectively renewed without removing roof sheets, significantly reducing cost and downtime for the client.

What experience does DVC bring to commercial roofing projects?
Founded in 1995, DVC Commercial Roofing Contractors are a family-run roofing company with decades of expertise in commercial roofing, felt roofing, commercial roof installation, and industrial roof replacement. Our reputation has been built on reliability, safety, and delivering watertight buildings.

How can customers get in touch?
For any roofing enquiries — including roof survey requests, commercial roof repair, or solutions to fix commercial roofing issues, don’t hesitate to contact our team, we are always happy to provide professional guidance and practical, cost-effective recommendations.



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