Most scaffold problems on housing developments are predictable from the pre-construction information that exists before the first plot is broken. Site dimensions, plot geometries, access constraints, adjacent properties, ground conditions and the developer’s build sequence are all knowable at pre-construction. A scaffold contractor that uses this information at pre-construction stage produces a scaffold strategy that supports the build. One that does not produces a scaffold strategy that fights the build.
Despite the obvious value of the pre-construction assessment, it is one of the most variably delivered items in the scaffold package. Some contractors do it thoroughly. Some treat it as a formality. The difference is usually invisible in the tender response, but it becomes very visible across the first three months of the live site.
A thorough pre-construction scaffold assessment covers several specific items. The geometry of the scaffold required for each plot type. The tie pattern against the actual wall construction in each plot type. The access routes for the scaffold trucks and material deliveries. The sequencing of scaffold erection across the development phases. The interface with the landscaping and external works that follow the build. The reinstatement strategy on strike. Each of these is best confirmed before the contractor mobilises rather than worked out on the day.
For housing developers, the question to insist on at tender stage is whether the bidder includes a documented pre-construction scaffold assessment. Globe Cambridge provides this assessment as part of the tender response on schemes of meaningful size. A developer can therefore compare the assessment quality across bidders, not just the unit rates.
The assessment typically surfaces issues that should be addressed in design rather than absorbed on site. A specific eaves detail that the scaffold cannot easily protect. A plot type where the scaffold tie pattern conflicts with the cavity insulation. A site access constraint that limits when scaffold trucks can attend. An overhead service that affects scaffold height. Each is a small issue. Each becomes a programme problem if discovered on the day.
Pre-construction assessment also surfaces opportunities to save scope. Where a single bespoke scaffold design can be reused across multiple plots of similar type, the design effort is amortised and the on-site adjustment is reduced. Where standard component lengths can be specified, the procurement is faster. Where the strike sequence can be optimised against the build programme, the duration of scaffold on site is minimised. Each is a small saving. Across a multi-phase scheme they add up.
The pre-construction assessment also affects the principal contractor’s CDM file. A scaffold contractor who has assessed the site before mobilisation produces RAMS that reflect the actual site conditions rather than generic ones. The principal contractor’s construction phase plan can be built around documented assessments rather than against speculative ones. Where the assessment is missing, the construction phase plan has gaps that surface during HSE inspection.
For larger housing developers running long-term framework relationships with scaffold contractors, the pre-construction assessment becomes a continuous activity rather than a one-off. The same contractor’s experience on previous sites informs the assessment of new ones. The framework partner gets better at predicting issues over time. That improvement is a real source of value that one-off competitive tendering rarely delivers.
There is also a programme certainty argument. A pre-construction assessment that has identified the likely friction points gives the developer’s project management team realistic dates to work to. The programme is set against the actual conditions of the site rather than against optimistic generalities. The dates hold more reliably as a result.
For developers procuring scaffold on price alone, the pre-construction assessment is often the casualty. The cheapest tender prices it lightly or not at all, because doing it properly costs the contractor time. The developer takes the saving and pays for the missing assessment on site, slowly, in friction the rest of the programme absorbs.
Specifying the assessment as a contractual requirement at tender stage is the way to make sure all bidders price it in. The cost of having it done properly is a fraction of the cost of not having it done.
Talk to Globe Cambridge To discuss pre-construction scaffold assessment for your housing scheme on your scheme, contact Globe Cambridge on 01223 890727 or email enquiries@theglobegroup.co.uk.
