Construction Sequence | RIBA Plan of Work

CLT Prefabrication

Cladding Prefabrication

Wood Fibre Insulation Prefabrication Floor Joists Prefabrication

The use of a panelisted CLT primary structure allows for the offsite prefabrication of the materials cut to precise dimensions, minimising onsite wastage.

The timber cladding can be prefabricated and painted offsite to ensure a precise finish under factory quality control conditions, ensuring minimal waste and high finishing standards.

Wood fibre insulation allows for the sustainable sourcing of offsite insulation, as it composed of waste wood products. These are prefabricated into panels and installed onsite.

As all the floor joists are a standardised measurement, these can be efficiently cut to size off-site, minimising waste and increasing the speed of production.

In RIBA Stage 5, it begins with the erection of the slab foundation as the site sits on loadbearing limestone, making it ideal for the building’s loadbearing capacity.

Secondly, the ground floor can be constructed, consisting of the panellised CLT structure and floor joists. The internal walls are also loadbearing, as they uphold the first floor mezzanine floor.

Next, construct the ground floor ceiling, first storey floor joists, panellised primary CLT structural walls, and staircase installation with easy crane access into the staircase core without a roof.

After both floors are constructed, the first floor ceiling and the CLT roof slabs can be installed. The veneer flooring of the outdoor garden space can also be installed at this stage.

Following the installation of the Roof Slabs, the roof can be finished, through the installation of roof joists, insulation and roof flashings and an EPDM roof membrane.

Next is the installation of the wall buildup, insulation, breather/ vapour layers and sheathing prior to the installation of the cladding. At this stage, doors and windows can also be installed.

As the structure of the building is now complete, the transition into the hadover stage begings and into the final finishes. The rainscreen cladding is installed around the building.

Finally, the building enters the use stage, where floor finishes, furniture and building services are installed. A post occupancy can be carried out to determine the buildings success.