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Protecting Bolton's books

Castle applies Kemperol waterproofing treatment to Bolton School's turret library roof

Posted by Stephanie Broad | August 12, 2015 | Outdoors

A refurbishment of Bolton School’s Turret Library Roof by Kemper System has helped to protect books and interior finishes.

Roofing contractor, Castle Roofing Consultants, carried out the refurbishment on the previous waterproofing membrane, which had been used to overlay the original asphalt roof less than a decade earlier. Subsequent water ingress had started to damage the library ceiling and interior finishes.

The affected area of roof sits above the main entrance to the school’s neo-gothic red sandstone quadrangle, with a turret on each corner and a flag pole in the centre. Castle Roofing used Kemper System’s Kemperol V210 cold applied waterproofing system to overlay the existing roof and provide a suitable colour match to the lead flashings of the traditional building.

The installation team then cleaned the existing substrate and carried out patch repairs where the substrate was blistered or water ingress had occurred before applying Kemper System’s D Primer.

The Kemperol V210 was then applied to the roof in a single process involving the waterproofing membrane, followed by a 165g flexible reinforcement fleece and further resin to ensure full saturation of the fleece before the system was allowed to cure.

The new waterproofing system was dressed to the full roof deck and into the chases, along with the upstands, flag pole plinth and the plinth for the roofline. The chases were resealed using sand and cement to ensure a completely seamless, monolithic waterproof membrane that will deliver a BBA-accredited 25-year service life.

Ian Clarke, head of estates at Bolton School, comments: “Castle Roofing has successfully used the Kemperol V210 system to waterproof the Turret Library roof and protect its interiors in a project that took just one week to complete during the half term break.

“The scheme will provide a robust, long-term solution for the roof while ensuring that there is no aesthetic impact on the fabric of our beautiful building.”    

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