Drainage

Patch Lining

The process of a drainage patch repair involves the use of a compressor, an inflatable rubber packer, thin woven textile matting and a 2-compound resin. The 2 resin compounds are mixed together then spread onto both sides of the matting. The matting is then folded and wrapped round the packer (which is covered with a film to prevent the patch sticking to the packer.) The patch is then pushed or pulled into position and the packer is inflated. The patch is then kept in the line under pressure until the resin has cured. The packer is then deflated and removed from the pipe. Finally, a CCTV camera is used to confirm that the patch repair has been installed successfully.

At DAMM, we have the capability to patch over faults found within drains previously surveyed. This is the process of lining the inside of a drain at a particular point where a fault has occurred either over time, or when it’s been initially laid. The first row of images below shows heavy water infiltration within a section of drain. The second shows this same section of drainage post repair, with a 450mm patch installed.

The second row of images again shows a ‘before and after’ scenario, where we repaired a badly broken joint in a 375mm pipe. This repair allowed the our client to have their housing development drainage system adopted (approved) by Scottish Water.

Project gallery

What our clients say

Over the past year DAMM have carried out numerous jobs for the service – from drainage jobs and CCTV surveys to civils works – and I couldn’t be more delighted with the outcome of the works. The knowledge, expertise and professionalism shown on each and every job is second to none, not to mention the continual focus on safety.

Barry Hollas @ Scottish Fire & Rescue Service

We had a drainage issue caused by works done. Sincere thanks to the DAMM team who were on site last night, to their credit they put a shift in to get the issue resolved. Genuine life savers. Please pass on my gratitude!

Tony Woods

DAMM Environmental have carried out full drainage cleaning works and civils for me over the last few years. It’s been a great working relationship. They have great help desk and on-site team. Online reporting is clear and precise, and this really helps show clients clear reports and works carried out. Quick turnaround on quotes and works when required.

Edward McGeown, Regional Facilities Manager @ Workman LLP

This firm is the best – kind, courteous and efficient.

Robert Neeson

DAMM have been assisting and undertaking Civils works at River Garden. This project involves multiple phases of civils works across multiple projects with residents living on-site, and public access to our social enterprise cafe. Across all aspects of this very challenging site DAMM have demonstrated a ‘can-do’ attitude and proven to be extremely responsive, helpful, collaborative and professional.

Roy Malcolm, G1 Architects

Highly recommend this company. Quick to respond and resolve our issue. Very polite, professional and knowledgeable. Great customer service.

Julie K Fisher

A great job and an extremely quick and efficient service provided by DAMM after an emergency left us requiring a lot of water removed. Any request was no trouble for the staff on site or from the office to accommodate. I would certainly recommend.

Fiona Paton

Excellent service from the two guys that came out to unblock my drain! I’d previously paid another company £250 for a call out, and they never fixed it – said I needed a tanker at a cost of £700! DAMM came out, fixed the problem in minutes, such nice lovely guys. I would definitely recommend them in future! Thank you!

We have been working with DAMM Environmental Ltd for over 8 years, and they are our main and principal supplier of gully and jetter services across Edinburgh, Glasgow, Falkirk, and beyond. Over this time, their professionalism, reliability, and consistency have made them an essential partner for our business.

Pedro Santos @ Locktel Limited

I contacted Damm, and they arrived the following day and fixed a long-standing drainage problem that I thought half my garden would need digging up to fix. They cleared the blockage within an hour or two, and left the garden as they found it. If I had not been present, I would not believe they had been there. I would not hesitate to recommend DAMM.

Leslie Williamson

DAMM brought clarity to a job three other firms had overcomplicated. Modern, straight-talking and seriously capable.

Estates Lead · Public Sector

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