External wall insulation retrofit programmes on existing housing stock are a specific category of work that scaffold contractors approach differently to new build. The buildings are occupied throughout, the works are typically funded through housing association or public sector programmes with tight budget constraints, and the interface between scaffold, existing services and the occupants matters much more than on a construction site.
What distinguishes EWI scaffold from new build scaffold
The specific requirements that distinguish EWI scaffold from new build scaffold include tenant access to entrance doors during the works, sequencing that minimises disruption to occupied properties, protection of existing services (satellite dishes, telecoms cables, gas meters, electricity supplies) fixed to the wall face being insulated, and reinstatement of these services onto the completed insulation surface at the end of the work.
Housing associations procuring EWI programmes should specify these requirements explicitly at tender stage rather than assume they are covered by generic scaffold provision. A contractor who has priced for tenant access provision, service protection, and reinstatement produces a different tender to one who has priced for standard scaffold erection.
Globe Cambridge's experience on EWI retrofit programmes includes specific approaches to each of these requirements. Tenant access is maintained through the works with fully lit, safely enclosed pedestrian corridors. Services are surveyed before scaffold erection and each service is either protected in place or temporarily disconnected with the tenant informed. Reinstatement is included in the scope, with services refitted onto the completed insulation surface with the correct fixing depth and weather sealing.
The tenant relationship on occupied schemes
The tenant relationship is a specific operational consideration. Occupants living in properties undergoing EWI experience noise, dust, restricted daylight, and unfamiliar workers on their site. Where the scaffold contractor's operatives are briefed on the tenant relationship expectations, the programme runs smoothly. Where they are not, complaints reach the housing association and slow the programme.
Globe Cambridge's operatives on EWI programmes receive tenant-facing briefings as part of their induction. Uniforms and ID cards are worn. Working hours are respected. Areas around plot access are kept tidy at end of each day. Tenants receive advance notice of any operations that will affect them directly.
There is a specific consideration around fire compartmentation that has become significantly more important since Grenfell. External wall insulation systems have to meet current fire safety standards, and the scaffold's role during install (which affects the sequence in which cavity barriers and fire breaks are installed) matters more than it used to. Housing associations procuring EWI should ensure the scaffold sequencing supports the fire safety installation rather than compromises it.
Documentation for the housing association
Documentation on EWI programmes serves both the housing association's asset management records and the scheme's ongoing compliance position. Each plot completed should have a documented record of the works, the operatives involved, the materials installed, the tests completed, and the tenant sign-off. Globe Cambridge's records structure supports this by default.
For housing associations procuring EWI programmes at scale, the choice of scaffold contractor is not a commodity decision. A contractor who understands the specific requirements of occupied-property retrofit produces materially better outcomes than one who prices for standard new build work. The cost difference is small. The programme, tenant satisfaction and compliance differences are meaningful.
For QSs pricing EWI programmes on behalf of housing associations, the specification of scaffold requirements should be explicit in the tender documents. Vague specifications produce vague tenders and variable delivery. Specific specifications produce comparable tenders and consistent delivery.
Talk to Globe Cambridge
To discuss scaffold for external wall insulation retrofit programmes on your scheme, contact Globe Cambridge on 01223 890727 or email enquiries@theglobegroup.co.uk.
