Restoring a Grade I- (or, in Scotland, Grade A)-listed building is a delicate and painstaking process. And the delicacy demanded of the works extends to the access methods chosen for the specialists carrying out the work.
Since early 2019 Lyndon SGB has been working under contract to management contractor Lendlease to install access scaffolding for the 拢330m repair and refurbishment project at Manchester Town Hall. This is the first full refurbishment the building has seen in its 150-year history, previous works having been undertaken on a piecemeal basis.
Lyndon SGB is now more than half-way through its contract and the building is fully scaffolded, 聽encapsulated in shrink-wrap sheeting and protected with temporary roofs.
The company currently has around 20 scaffolders permanently on site, erecting the roof access scaffold.聽
At the height of the operation, Lyndon SGB had up to 55 operatives working there.
Craig Parry, project manager for Lyndon SGB, notes that Manchester Town Hall 鈥渋s among the top 2% heritage buildings in the UK鈥� and the restrictions this places on his job of scaffolding the structure are onerous.
For example: 鈥淲e have to keep ties to a minimum to avoid damaging the building聽
itself. We try to fix ties to stones that are due to be replaced,鈥� he explains.
鈥淲e plan the location of the ties, then we have to get them signed off by Lendlease, then Manchester City Council and then by English Heritage. Each tie is signed-off with four signatures before, during and after installation,鈥� adds Parry.聽
The building itself is large, complex and ornate. 鈥淣othing is sequential,鈥� says Parry. 鈥淣othing mirrors anything else; there are no square corners, nothing is parallel鈥︹��
But now Parry and his team have completed the full external scaffolding structure and installed the temporary roofs.
All the roofs on the building are being stripped and the natural slate tiles are being replaced. The underlying timber structures are generally in very good condition, says Parry, which is remarkable as they have hardly been touched since they were built. The slates, however, are weathered and need replacing.
The temporary roof 鈥� a proprietary third-party system 鈥� was erected in January; Lyndon SGB had to wait until Lendlease had signed off restoration work on the many brick chimneys. Roof access is provided by a Haki staircase system.
The scaffold sheeting, however, is a specialist system that is shrink-wrapped onto the scaffolding. This type of building wrap is usually the preserve of a specialist but Lyndon SGB has established its own division to carry out this work.聽
鈥淣o other scaffolding contractors supply their own shrink-wrap system 鈥� it鈥檚 usually a third-party operation,鈥� says Lyndon SGB regional manager Jon Cooke. 鈥淲e set up our own division for this because we want to control our own destiny,鈥� he adds.聽
Installing the building wrap system is a very different operation from traditional scaffold sheeting. Whereas traditionally the heavy-duty sheets are secured to the scaffolding and tensioned with ties, the wrap is fixed to a special subframe and tensioned by shrinking with heat guns.聽
鈥淚t鈥檚 a very skilled operation that takes a long time to master. It鈥檚 easy to burn a hole if you don鈥檛 know what you鈥檙e doing鈥� says Cooke. Luckily, Lyndon SGB鈥檚 building wrap division is managed by a specialist, Paul Maskin, who is experienced in the technique.
With the scaffold completed and sheeted, 聽and the temporary roofs in place, Lyndon SGB will now only need to make minor adjustments to accommodate the needs of the specialist contractors carrying out the restoration work.
Cooke believes the Manchester Town Hall project to be the biggest scaffolding contract in the UK, and possibly the whole of Europe, currently. 鈥淚t鈥檚 a unique project; you鈥檒l never see this done ever again because from now on, there will be a programme of scheduled maintenance. It鈥檚 a once-in-a-lifetime opportunity for us,鈥� he adds.
Cooke and Parry are already working on the next major operation: planning the scaffold decommissioning process which is due to start in September.聽
Whereas the scaffold has been installed progressively over several months, it will all need to be dismantled and removed in just a few weeks.
鈥淲e鈥檝e got 4,000 tonnes of scaffolding to dismantle and remove from the site,鈥� says Cooke. 鈥淎ccess is very difficult; we鈥檙e very close to the public realm and surrounded by neighbouring buildings. There are also three courtyards within the town hall and we can鈥檛 get any vehicles close to those.
Meanwhile, up in Glasgow, Lyndon SGB is working on another delicate heritage restoration project, supplying a bespoke scaffolding and access system for Glasgow School of Art鈥檚 famous Mackintosh Building.
The Mackintosh Building, a Grade A-listed building, was almost completely destroyed by a fire that ripped through it in the summer of 2018, only four years after another, smaller blaze had gutted parts of the building.
Lyndon SGB has been active on site from the start of reconstruction work, first as principal contractor and subsequently under main contractors including Taylor & Fraser, Kier and now Lanarkshire-based Reigart Contracts.
Lyndon SGB鈥檚 role on the project has seen it contribute through all phases, from delivering access for the west wing and a temporary roof following the first fire to fa莽ade retention and general access scaffolding following the second blaze.
The first scaffold works began in August 2014 when Lyndon SGB erected a bespoke structure incorporating soldier brackets to the rear elevations over adjoining roofs and a proprietary Coverspan roof over three roof pitches. It also supplied support scaffolds to the west piers 鈥� although these scaffolds were never completed, being destroyed in the second fire.
Phase two of the scaffolding began in June 2018 with the installation of a specially-designed heavy duty facade retention system. The temporary works phase is ongoing, with an estimated completion date of late 2025 or early 2026.聽
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