Case Study- Chorlton Baths

Project:            Chorlton Baths

Address:          Former Chorlton Baths, Manchester Road, Chorlton-cum-Hardy, M21 9PG

Contractor:       Caddick Construction

Roof size:

Block A 370M2

Build Up: IKO Ultra Gold Cap Sheet, IKO Ultra T-F Underlay, Entertherm Gold 250mm Insulation, IKO Ultra S-A VCL

Block B 290M2

Build Up: IKO Ultra Gold Cap Sheet, IKO Ultra T-F Underlay, Entertherm Gold 250mm Insulation, IKO Ultra S-A VCL

Lift Core Roof 6M2

Build Up: IKO Ultra Gold Cap Sheet, IKO Ultra T-F Underlay, Entertherm Gold Insulation, IKO Ultra S-A VCL

Access Deck Level 5 197M2

Build Up: IKO Ultra Gold Cap Sheet, IKO Ultra T-F Underlay, Entertherm Gold Insulation, IKO Ultra S-A VCL

Access Deck Level 4 197m2

Build Up: IKO Ultra Gold Cap Sheet, IKO Ultra T-F Underlay, Spectratex Fleece 300 GSM

Access Deck Level 3 197m2

Build Up: IKO Ultra Gold Cap Sheet, IKO Ultra T-F Underlay, Spectratex Fleece 300 GSM

Access Deck Level 2 197m2

Build Up: IKO Ultra Gold Cap Sheet, IKO Ultra T-F Underlay, Spectratex Fleece 300 GSM

Access Deck Level 1 197m2

Build Up: IKO Ultra Gold Cap Sheet, IKO Ultra T-F Underlay, Spectratex Fleece 300 GSM

Entrance Porch 6m2

Build Up: IKO Ultra Gold Cap Sheet, IKO Ultra T-F Underlay, Entertherm Gold Insulation, IKO Ultra S-A VCL

The Chorlton Baths redevelopment has now been successfully completed, transforming a former public baths site into a modern extra-care residential scheme. The £14 million development delivers 50 high-quality apartments designed specifically for residents aged over 55.

Split across two five-storey buildings, the scheme includes a mix of affordable rent, shared ownership, and neighbourhood apartments. In addition to the residential accommodation, the development incorporates a range of shared facilities, including a communal lounge, landscaped outdoor areas, and secure parking and cycle storage.

Backed by funding from MSV Housing, Manchester City Council, the Greater Manchester Combined Authority and Homes England, the project has created a sustainable, low-carbon living environment in a well-established neighbourhood with strong transport links.

Here at Enviroply Roofing, we were responsible for delivering all flat roofing and waterproofing elements across the scheme. Working in partnership with Caddick Construction, we installed a combination of IKO systems tailored to the different roof types and usage requirements throughout the development.

Each roof area required a slightly different specification, ranging from fully insulated warm roofs to protected deck systems and liquid-applied waterproofing.

All installations were carried out in line with IKO guidance, current British Standards, and NHBC requirements, ensuring consistent performance across the project.

Extensive preparation works were undertaken prior to installation, including substrate checks, adhesion testing, and moisture verification to confirm suitability for the specified systems.

For these areas, a full warm roof system was installed.

A continuous layer of IKO Ultra S-A VCL was installed as the air and vapour control layer. Being self-adhesive, it allowed for a consistent seal across the deck, helping to minimise the risk of moisture ingress and preventing the build-up of interstitial condensation within the roof construction.

IKO Enertherm Gold Insulation boards were then fitted above the AVCL, with a 250mm thickness applied to Blocks A and B to meet the project’s thermal performance targets. Prior to installation, all substrates were suitably prepared and primed using IKOpro Bonding Agent or IKOpro Sprayfast MPP to promote strong adhesion and ensure system compatibility.

The waterproofing build-up was formed using IKO Ultra T-F Underlay followed by the IKO Ultra Gold Cap Sheet. These membranes were torch-applied to achieve a fully bonded system, delivering a durable, high-performance finish with a life expectancy exceeding 25 years and compliance with BS EN 13707.

All hot works were undertaken in accordance with NFRC Safe2Torch guidance. In areas where open flame presented a risk, flame-free methods were adopted using compatible systems such as IKO Ultra T-F or IKO Ultra Stick to maintain safety without compromising performance.

Perimeter details, penetrations, and vertical upstands were completed using a two-layer detailing approach to ensure continuity of the waterproofing.

Upstand heights were formed to a minimum of 150mm in line with BS 6229 and NHBC standards.

These deck areas required a solution capable of withstanding regular foot traffic while supporting additional finishes.

A layer of Spectratex Fleece 300 GSM was installed directly onto the deck to act as a protective and separating layer. This helped absorb minor movement within the structure while shielding the waterproofing system from potential mechanical damage.

The main waterproofing was achieved using IKO Ultra T-F Underlay and IKO Ultra Gold Cap Sheet, both torch-applied to create a resilient and fully bonded finish.

Installation works followed IKO best practice and Safe2Torch procedures throughout. Particular attention was given to perimeter zones and exposed edges, where additional bonding and mechanical restraint were introduced to address increased wind loading, in line with BS EN 1991-1-4 guidance.

Falls were incorporated within the deck construction to achieve a minimum gradient of 1:80, ensuring effective drainage and reducing the risk of standing water.

Balcony areas were waterproofed using an IKO Ultra Gold system designed to perform beneath paving finishes.

Concrete substrates were prepared using either IKOpro Bonding Agent or IKOpro Sprayfast MPP, ensuring a clean, sealed surface ready to receive the waterproofing layers.

A two-layer system consisting of IKO Ultra H-A Underlay and IKO Ultra Gold Cap Sheet was installed to provide a robust and watertight barrier. Torch application was used across the main areas, while flame-free detailing techniques were applied at thresholds, upstands, and other sensitive interfaces using IKO Ultra T-F detailing underlay and IKO Ultra Stick Cap Sheet where required.

An IKO Protection Fleece was laid above the membrane to act as a separation layer beneath the paving system, helping to prevent damage during installation and in service.

Balcony detailing incorporated IKO ALU Angle Fillets, IKOFlash cover flashings, and IKO GRP edge trims where necessary. Upstands were generally formed to 150mm, with reduced heights of 75mm accommodated at level-access thresholds in accordance with NHBC guidance.

The walkway areas were completed using the IKO Metatech PMMA liquid waterproofing system, selected for its seamless application and durability under frequent use.

Priming: Depending on the substrate type, surfaces were prepared using either IKO Metatech Porous Primer or IKO Metatech Non-Porous Primer to ensure proper adhesion of the liquid system.

Waterproofing System: The IKO Metatech Waterproofing system was then applied as a cold-applied PMMA solution. Reinforced with IKO Polyester Fleece 110, the system created a fully bonded, flexible membrane with no joints or laps.

Detailing and Reinforcement: All critical details, including upstands, joints, and penetrations, were reinforced using a combination of IKO Metatech Detail Fibre, Surfacer, Mortar L+P, and IKOpro Bridging Tape to ensure a continuous and reliable seal.

Additional components used within the system included IKO Perkadox Catalyst, IKO Acetone Cleaner, IKO Trim L edge trims, and IKO Elite Internal Rainwater Outlets.

The completed surface provided a hard-wearing, slip-resistant finish, well suited to high-traffic areas and offering strong resistance to UV exposure and long-term weathering.

Throughout the project, strict quality control measures were implemented to ensure all works met the required standards. Installation was carried out in accordance with BS 6229, BS 8217, and BS 5250, alongside IKO and NHBC guidance.

All areas scheduled to receive finishes such as paving or decking were subjected to Electronic Leak Detection (ELD) testing prior to completion, confirming the integrity of the waterproofing system before it was covered.

The works were independently inspected by an IKO Technical Engineer at key stages and upon completion. As a result, the project was issued with a 20-year IKO Single Point Guarantee, covering materials, design, and workmanship.