Published: 01 March 2019
Prokil were approached by the South West Regional Works Manager for Landmarc Support Services Ltd who support the British Army on Training Estates. The toilet facilities situated in the basement at the Observation Tower at 5 Tips Ranges kept experiencing severe flooding whenever it rained with the basement having as much as 400mm of water.
Chris Atkey, South West Regional Works Manager said, “Past solutions to combat the flooding included numerous excavations around the perimeter of the building and various drainage solutions, none of which proved successful. It was agreed that a permanent solution from a specialist basement waterproofing company was needed. Based on a recommendation, I approached Prokil and I’m so glad I did, they have been professional and knowledgeable from initial survey through to job completion.”
Basement Survey Findings
Alex Marsango, our Certificated Surveyor in Structural Waterproofing (CSSW) visited the site to conduct a full investigation into the flooding issues. Following the assessment it was discovered that the basement didn’t have a suitable waterproofing system in place and a new British Standards Institute (BSI) compliant system with sufficient drainage was recommended to stop the flooding.
Getting to Work
Stage 1 – Health & Safety
The first stage involved the Prokil team undertaking a full risk assessment as the construction site would be on a live military training firing range. As part of the requirement Prokil would also need to supply and maintain a fully self-contained welfare unit and suitable secure fencing around the site to fully enclose the works area to comply with Construction Design and Management (CDM) Regulations 2015.
Stage 2 – Preparing the Site
The team started by isolating all plumbing and electrical fixtures and fittings from the basement area, itemizing and storing them for re-use if possible. Following this they removed and disposed of existing floor coverings and surface finishes and then excavated the basement area internally and externally to make space for the drainage system.
Stage 4 – Installing the Waterproofing System
A full “Type C” waterproofing system was installed to comply with BS 8102:2009 code of practice for protection of below ground structures against water from the ground and to include all associated plumbing, electrics and drainage.
Stage 5 – Reinstate & Decorating
After the basement waterproofing system had been installed it was time to plaster the walls, redecorate, install new flooring and reinstate the sanitary units.
Stage 6 – Rubbish Disposal
Prokil organised an onsite skips throughout the project and ensured all rubbish was removed and disposed of legally. On completion of the work the Prokil team carried out a thorough clean of the facility leaving the site tidy and ready for use.
The Finished Result
After 6 weeks on site the Prokil team transformed the bleak and flood damaged toilet facilities at the Observation Tower at 5 Tips Ranges into a pleasant and usable rest room for military personnel.
Selection of photos below of the basement waterproofing system installation at The Lulworth Ranges.
About Lulworth Ranges
The Lulworth Ranges are military firing ranges located between Wareham and Lulworth in Dorset, England. They cover an area of more than 2,830 hectares (7,000 acres), are leased in a rolling contract from the Weld Estate by the Ministry of Defence and are part of the Armoured Fighting Vehicles Gunnery School based at Lulworth Camp. The ranges were established in 1917.