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TRS Total Roofing Solutions
TRS Total Roofing Solutions
TRS-installed seamless commercial gutter

Gutters & Rainwater Systems

Commercial Gutters & Rainwater Systems

Leaking and overflowing gutters are one of the most common causes of internal water damage on commercial and industrial buildings. TRS investigates why the rainwater system is failing, then repairs, lines, replaces or redesigns it, covering gutter lining, replacement gutters, outlets and downpipes, gravity drainage assessment and syphonic drainage where it is suitable.

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Introduction

Repair, line, replace or redesign?

Gutter problems are rarely caused by one thing. Overflow can come from blocked outlets, inadequate falls, corrosion, failed joints, undersized outlets or downpipes, building movement, poor interfaces with the roof, or a drainage layout that no longer matches how the roof discharges. Repair, lining, replacement and redesign are all reasonable answers, but only after the cause is established.

TRS carries out the investigation first, then sets out the options: localised repair, cold-applied gutter lining, replacement gutters in steel or aluminium, outlet and downpipe upgrades, or a drainage redesign where capacity is the real problem. Ongoing clearance and inspection sit within our maintenance and PPM service, and condition is recorded through a roof and rainwater survey.

Because rainwater goods usually sit directly above production, stock or teaching space, access, containment and out-of-hours working are planned before work starts. Much of this work is on industrial buildings where the operation below cannot stop. TRS acts as Principal Contractor under CDM 2015, is SSIP-accredited, and provides a dedicated Contracts Manager on every project.

Why it matters

Why commercial gutters overflow or leak.

Blocked Outlets

Leaf litter, silt and debris restrict outlets, so water backs up and overtops the gutter sole.

Inadequate Falls

Flat or reversed falls hold water in the run, increasing corrosion and overflow risk.

Failed Joints

Movement, sealant failure and fatigue at in-run joints are a frequent leak location.

Corrosion

Standing water, cut edges and debris accelerate corrosion of steel gutters and bearers.

Cracked Liners

Previously lined gutters can crack or debond, particularly at joints and outlets.

Insufficient Capacity

Outlets or downpipes may be undersized for the roof area or current rainfall intensity.

Building Movement

Structural movement and settlement open joints and disturb gutter alignment.

Changed Drainage

Extensions, new roof areas or altered discharge can overload an existing layout.

What we do

Gutter and rainwater services

Our work runs from investigation and repair through to replacement and drainage redesign. No single cause is always responsible, so the scope follows the investigation rather than a standard package.

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Gutter Investigation & Repairs gutters & rainwater systems system installed by TRS on a UK commercial building

Gutter Investigation & Repairs

Investigation of leaks and overflow, including falls, outlet capacity, joint condition and corrosion, followed by targeted repairs to joints, outlets, bearers and rainwater goods where repair is proportionate.

Gutter Lining gutters & rainwater systems system installed by TRS on a UK commercial building

Gutter Lining

Cold-applied GRP and liquid liners installed within the existing profile where the gutter remains structurally sound, avoiding cutting out and reducing time above the operation below.

Replacement Gutters gutters & rainwater systems system installed by TRS on a UK commercial building

Replacement Gutters

Replacement of life-expired gutters in galvanised steel, aluminium or bespoke profiles, including continuous and site-formed options, detailed into the existing roof and interfaces.

Outlets & Downpipes gutters & rainwater systems system installed by TRS on a UK commercial building

Outlets & Downpipes

Replacement and upgrading of outlets, hopper heads, brackets and downpipes, sized against roof area and rainfall intensity rather than replicating what was there before.

Rainwater Calculations gutters & rainwater systems system installed by TRS on a UK commercial building

Rainwater Calculations

Calculation of roof area, rainfall intensity and discharge capacity to confirm whether the existing gravity layout is adequate or whether additional or larger outlets and downpipes are needed.

Syphonic Drainage Where Suitable gutters & rainwater systems system installed by TRS on a UK commercial building

Syphonic Drainage Where Suitable

Where roof geometry, outlet arrangement and hydraulic design make it suitable, syphonic drainage can provide high-capacity rainwater removal with fewer downpipes. It is not appropriate for every building, and suitability is confirmed through hydraulic design.

Technical note

Planned clearance and inspection are handled through our planned maintenance service, which is usually the cheapest part of any rainwater strategy.

Industries we serve

Where we work on rainwater systems.

Our process

From drainage investigation to tested rainwater system.

  1. Step 1

    Condition & Capacity Investigation

    Gutter condition recorded and the existing drainage layout checked against roof area and design rainfall.

  2. Step 2

    Repair, Line Or Replace Assessment

    Findings used to establish whether repair, lining, replacement or redesign is the proportionate answer.

  3. Step 3

    Material & Drainage Specification

    Material, finish, profile, outlet and downpipe sizing specified for the building.

  4. Step 4

    Access & Operational Planning

    Access, containment and out-of-hours working planned around the operation below.

  5. Step 5

    Installation & Testing

    Installed and water-tested, with joints, outlets and discharge checked in use.

  6. Step 6

    Handover

    Test records, warranty documentation where applicable and maintenance requirements issued.

Why TRS

Rainwater problems diagnosed before they are priced.

Gutter work is easy to specify badly. TRS investigates capacity as well as condition, so the scope addresses the reason water is getting in rather than simply renewing what failed.

Condition
Investigated before pricing
Capacity
Considered against roof area
Repair
Or replacement, decided on evidence
Testing
Documented on completion

  • Principal Contractor

    CDM 2015 Principal Contractor on complex live-building schemes.

  • Survey-Led Specification

    Specifications are written for the individual roof and project objectives.

  • Live & Occupied Sites

    Works planned and sequenced around buildings that remain in use.

  • Experienced Managers

    Dedicated Contracts Managers on every project, one point of contact.

  • Guarantee Options

    Where a system guarantee is available, availability and duration depend on the selected system, specification, substrate condition, preparation and manufacturer requirements.

  • Documented Handover

    Quality checks through the works, with O&M and maintenance information at completion.

Featured projects

Recent gutters & rainwater systems projects.

All case studies

FAQs

Gutters & rainwater, questions we get asked.

If your question isn't here, ask our team directly on the contact page, or read the technical guidance in our knowledge hub.

  • It depends on the condition of the gutter sole, joints, bearers and the substrate below. Where the profile remains structurally sound and the failure is in the waterproofing, a cold-applied liner can be a proportionate refurbishment. Where corrosion has perforated the gutter or affected bearers and fixings, replacement is normally the appropriate answer.

Speak to TRS

Gutter leaks damaging the operation below?

A rainwater investigation establishes the cause and capacity, then sets out repair, lining, replacement or redesign options with a budget and programme.

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Related services

Complementary TRS capabilities.