The Thermal Insulation Contracting Association (TICA) is calling for tighter scrutiny of specialist contractors working on Higher Risk Buildings (HRBs), warning that competence across the supply chain is still too often assumed rather than properly verified.

The association says it has received multiple complaints about non-specialists installing thermal insulation to pipework and ductwork on HRBs. Reports include the use of flammable products instead of specification-compliant materials, as well as substandard workmanship resulting in overheating and condensation issues.

In response, TICA is preparing to launch TICA Assured, a new independent certification body that will provide UKAS-accredited audits for thermal insulation contractors. The scheme is intended to help TICA members demonstrate competence to their supply chain partners.

A recurring concern, the association says, is that some Mechanical & Electrical contractors are carrying out thermal insulation works in-house without engaging appropriately qualified specialist contractors.

TICA also highlights the growing use of Polyethylene pre-insulated pipework in communal areas of HRBs as an area of particular concern, citing a lack of clarity around reaction to fire testing and certification for many products currently on the market.

Chris Ridge, Technical Director of TICA, said:
“The client, principal designer and principal contractor all have duty holder roles on HRBs. For the duty holder, the case for compliance is only as strong as the weakest specialist sub-contractor employed on a project.

“All too often Mechanical & Electrical contractors are assuming their own organisational capabilities when it comes to the selection and installation of thermal insulation. In many cases, this has led to the selection of flammable products instead of specification compliant products, and poor workmanship leading to issues such as overheating and condensation.

“We should expect better for our residential sector. Initiatives like the BESA Pledge show us that there is a way forward. Leading Mechanical & Electrical Contractors are beginning to appreciate the value of managing competence within their own supply chain. This needs to be recognised by their clients also.”

TICA is clear that responsibility ultimately rests with the duty holder to verify organisational capability across the supply chain, including thermal insulation specialists. It also advises that duty holders should check the Skill Cards of all workers on site.

Chris Ridge added:
“With the exceptions of domestic plumbing (in dwellings) and commercial refrigeration using flexible foams, all thermal insulation should be carried out by a Thermal Insulator with the appropriate TICA CSCS Skill Card. Not by a labourer. And not by someone with a card appropriate to plumbing, ductwork or any other trade.

“There is a reason large multi-occupancy buildings have been designated as HRBs. We can do better than this, but we need to start with greater collaboration between duty holders and the various construction sector specialist trade associations. Let’s work together to pave a better way.”