The roof of Stansted House, a Grade II Listed Edwardian country house was refurbished using a liquid waterproofing solution from Kemper System.
Located on a 1,800-acre estate within the South Downs National Park on the Hampshire/Sussex border, the historic Stansted House originally served as a hunting lodge in the 11th century. It has since been extensively redeveloped and is now used as a tourist attraction and for a variety of events, including weddings and corporate functions. It also offers residential and office space.
The 500 sqm roof had been laid with lead roll which were spread over three tiers and also used across nine dormer flat roofs. Over time, parts of the lead had become damaged due to age so were causing water ingress at several points.
A Kemper System solution
To replace the lead would have been expensive, so Kemper System’s Kemperol V210M liquid waterproofing system was specified to resolve the water ingress problems. This provided a cost-effective, reliable, and quick solution for this prestigious refurbishment project.
The existing damaged lead substrate was cleaned and prepared, and the Kemperol V210M was then applied over the top in a single, wet-on-wet process. This involved the use of an innovative polyester reinforcement fleece, designed to increase the speed of resin saturation and allow trapped air to escape quicker to save time on site and further improve the ease of application.
Once cured, the system formed a seamless, elastomeric waterproof membrane which bonded directly to the substrate.
The system eliminated the need to remove, and dispose of, the existing lead - and as it is cold applied, it ensured the waterproofing process was very time efficient. This was particularly important to minimise disruption for the occupants of Stansted House and its visitors, enabling the building to remain open throughout the works.
The existing lead flashing round the chimney breasts were raised to allow the Kemperol waterproofing to be terminated underneath. Once cured, the flashings were put back into position.
Challenges that faced the contractor was the great British weather. Application had to be sequenced to ensure that curing times and overcoating times were not affected by either wet weather or debris blowing over the coating.
A further benefit of the Kemperol was its ‘grey’ colour which emulated the weathered appearance of the original lead substrate. On the higher tiers of the roof, a Kempertec traffic coating was installed to allow easy access for maintenance of the roof area.
The Kemperol V210M has provided this historic building with a highly durable roof covering that cannot delaminate and is UV stable. Solvent free and tear resistant, the system is proven to last for at least 25 years.