Standing at one of the highest points in Dartmoor, Castle Drogo is a Grade 1 listed building built in 1911 and is the UK's newest castle.
Over the next five years renovations will take place to repair the roof, repointing and replacing windows.
In order for the renovations to happen complete access and containment around the historic building was required to prevent any further damage.
Due to the vast schedule of works taking place SRK had 14 weeks over two phases to erect a temporary roofing system, the support scaffold and access scaffold to fully cover and surround the Castle. SRK chose to use HAKITEC 750 temporary roofs and HAKI Universal system.
Two temporary roofs were erected, one 38m span in order to cover the vast main area of the castle to be renovated and another 16 m span for the rear of the building. To erect these safely, the roll-out with tie chord method was deployed. This enabled the scaffolders to erect the roof from a safe, guarded working platform at all times with no need to climb out onto the roof trusses.
Using this erection method reduces the chances of falling objects such as spanners and ensures that the roof is secure over a working platform before it is rolled out over the building. Likewise, dismantling is a much safer operation and removes the chance of damage occurring to the newly installed renovations.
As part of the refurbishment large Lantern Stone heads will be crane lifted into the building.
This will not need the removal of the roof, as the HAKITEC 750 temporary roof sheeting can be safely and easily pulled back to create an opening. In addition, should bad weather occur whilst the roof is open, it can be closed within 15 minutes.
The scaffold was designed in 3.05 m and 2.5 m sized bays reducing the number or components and therefore time taken to erect the scaffold. The system scaffold with advanced guard rails enabled the team to erect each lift securely without the need temporary guardrails ensuring that scaffolders were always working behind a guard frame.
A key requirement from the access scaffold was the close proximity to the workface in order to carry out the repairs to the walls and replacement of 900 windows. Using the HAKI Universal system's beam riders and the load bearing ledger beams, SRK were able to create a scaffold that could reach into recesses and move around obstructions in the building without the need for additional standards, all whilst maintaining the same 3 kN load capacity.
SRK using and supported by HAKI were able to erect the roofs and scaffolding well within the six week schedule using a team of only eight scaffolders. The roofs and scaffolding are to remain in place for 18 months providing a safe, well lit and dry working area.