"newton waterproofing systems"

The purpose: Water penetration into classrooms alerted theOfsted “outstanding” rated Colchester County HighSchool for Girls in Essex to a problem with its roofs.Its premises advisors, Archer Building Consultancy,turned to Langley to offer technical support for themost efficient best-value rectification, with fundingprovided by the school’s governing body, The AlphaTrust.Our solution: We carried out an in-depth roof condition report which highlightedthat the four flat asphalt and 10° pitched copper standing seamroofs urgently need repair.We advised the most efficient solution and use of resources wasto strip the copper roof back to the plywood deck and form a newwaterproof layer from our TA-30 Flat Roofing System and theasphalt roofs overlaid with TA-30 and our Liquid Roofing System.By leaving the original roof, we were able to minimise disruption.In the process, we assessed the roofs for their suitability forphotovoltaic (PV) installation, then helped address energy costs:one over a three-storey building was deemed appropriate. Finally,in partnership with Archers, we supported the detail required toapply for Salix funding to cover the supply and installation of thePV array.

Established in 1976, Corfe Hills School in Dorset welcomes over 800 secondary and sixth form students through their gates each year. Since achieving Academy status in 2011, Corfe Hills have been looking ahead, keen to develop a schedule of works for building improvements that support the school’s growth and ultimately safeguard the building’s future.Over time, the existing roofs across the site had experienced continuous water ingress issues that needed to be addressed. Multiple roof penetrations from the roof lights were leaking water; the existing waterproofing system and the overlaid bituminous membrane were failing in places resulting in splits and blistering, and the metal roof had rusted beyond repair. With rain seeping directly into the classrooms below, action had to be taken to ensure the site was remedied to a safe and comfortable learning environment for students and staff.Garland Technical Manager, Paul Boole, was instructed by building surveying firm Kendall Kingscott to support Corfe Hills approaching CIF bid for the critical roof refurbishment works. An essential part of the brief was to ensure that the buildings were not only fully waterproofed but to upgrade the overall thermal efficiency, alongside securing a robust 20-year guarantee.In support of the CIF bid, Paul carried out a thorough investigation of the school’s roof assets for Kendall Kingscott, producing core sampling data, detailed condition surveys and U-Value calculations to outline a clear specification for the works required. 

This project is unusual and offered an interesting scope. Delta was approached to give assistance on designing a robust waterproofing solution to a new build basement within a Synagogue in North London. The main contractor having previously worked with Delta, knew Delta would be able to provide this project with a high calibre waterproofing design whilst offering respect for the community it serves.

The brief for this project was to design, supply and install a bespoke and sympathetic waterproofing solution to a Grade II listed, commercial structure with an impractical damp basement.Delta Registered Installers, MacLennan Waterproofing worked closely with the Principal Contractor, HB Projects to achieve a Grade 3 habitable space whilst preserving this historic structure.The Co-op shop in Petworth Village, provides the local community with everything they need, whether its household essentials or a place to meet friends.The site incorporates two Listed Buildings, including part of a Listed Church. The store applied for listed building consent to reconfigure its ground and basement floors, to increase the retail floor space and improve the functionality of the store.When designing a waterproofing/damp proofing solution in a historic building or a structure of architectural interest, additional design considerations should be employed during the design stage to maintain preserve aesthetic and structural integrity of the structure/building. The waterproofing design should be sympathetic in application whilst offering a robust solution.Care consideration should be applied when specifying products to ensure they are ideally suited for meeting the complexities of listed building requirements.

To fulfil the requirements of BS8102:2022 and BS 8485:2015+A1:2019 a strategy to develop a specification which combines structural waterproofing and ground gas protection were required for this refurbishment project.The project involved creating additional living space to an existing mid terrace Victorian property in W12. The site of the property, whilst not being located on contaminated land was identified as being potentially at risk, it was near what is classed as contaminated land (an old brick yard).To satisfy Building Control requirements gas protection measures were required to meet BS 8485:2015+A1:2019.Site investigations at former brickworks and landfill sites are within expected UK guidelines for contamination. Ground investigations incorporate both soil sampling, ground gas and groundwater monitoring.In accordance with Table 3 of BS 8485:2015+A1:2019 a residential building is classed as a Type A building, creating a “high risk” requirement for ground gas protection. With the structure requiring a Grade 3 habitable environment attention as required to offer a system which meets all requirements.

Rising up from its Thames-side site at Pimlico at the meeting of Millbank and Vauxhall Bridge, River Walk is an elegant new development of 116 high specification apartments with 170 crescent-shaped balconies, all of which need to be carefully waterproofed. Specialist roofing contractor Knight Asphalte Co Ltd is carrying out this task, using Hydrostop AH-25 liquid waterproofing.

he NHS Trust commissioned Breath Energy to review its estate, recommend and manage a programme of works to significantly reduce energy costs and CO2 emissions.Central to the works was the external upgrade of the main Epsom Hospital premises, the Wells Building, to improve thermal performance and address failings in the building fabric. The existing roof areas had failed and were allowing water ingress, potentially not only damaging the building fabric and energy efficiency but essential hospital equipment.Langley’s project team had to devise solutions that enabled the whole building exterior- facades and roofs – to be upgraded while the seven-storey hospital remained operational. Added to the complexity, the project began while Covid-19 restrictions were in force.Our solution: Detailed roof surveys prior to work commencing enabled us to identify potential problems and advise on effective solutions in advance.We recommended full strip-up of the roofs, as the existing had perished beyond economical repair. We advised new construction with TA-25 W Flat Roofing System on the main roof, stairwell roof and plant room areas. The TA-25 system is independently certified by the BBA (British Board of Agreement) confirming Broof (t4) classification. It also has LABC assured accreditation to provide support with regard to building control. The inclusion of insulation meant the new roof achieved the current requirement of 0.18W/m2K.While a full strip-up of the two terraces and balcony would also have been the preferred solution, the depth of work would have been impractical as the hospital’s operating theatres were below, and in use. Our solution was to remove the existing top layer and replace with PC-20W Liquid Roofing System and install breather vents to address moisture within.

Delta Registered Installers Timberwise (UK) Limited were called upon to offer a waterproofing design to this Grade II Listed property to meet the requirements of BS 8102:2009 to achieve a dry habitable living space, defined as a grade 3 environment.

The TaskOriginally a garage for a local car showroom in the town centre, The Forum has most recently been a storage facility until the College began redevelopment of its kitchens in a 12th Century Grade 1 listed building. This provided improved and expanded catering facilities. During the works, the College still needed kitchen and dining facilities, prompting the re-purposing of The Forum.Northmores Project Management Consultants were contracted by the College to manage the project, designed by Paul Vonberg Architects, to future-proof the building.The Outcome“It was a very tricky project. Logistically, being right in central Cambridge, and during COVID, we had to ensure we were rigorous in our safe practice. Fortunately, the new internal design of the Forum meant it was easy to operate a one-way system for any internal workings making good the linings where the rooflights had been and redecorating. From a reroofing perspective too it was complex. The team at Langley devised a practical solution and were always on hand to support us with technical advice if needed.”

Salisbury Walk is part of the Girdlestone Estate in London, and the last phase to be upgraded by landlord the London Borough of Islington as part of their commitment to delivering decent homes standards.The TaskWorking to our detailed specification, Opus stripped the existing profiled metal roof and built up our TA-30 Flat Roofing System, installing insulation to achieve 0.18W/m2K as advised by current Building Regulations. Ventilation and rooflight hatches were also upgraded and new upstands fitted.The Outcome“Having achieved such a positive result in the refurbishment elsewhere on the estate by utilising the services of Langley and Opus, it gave peace of mind for all stakeholders to re-apply that formula in other works. It brings us a valued perspective, enabling us to make informed decisions going forward about the condition of the estate, knowing we have consistency in approach, design, materials and application. We also have the peace of mind, going forward, that the roofs are all upgraded to a high standard and are assured for decades to come.”Theo Petrou, Mears Group Project Manager

When specifying the most appropriate method of waterproofing for a new-build basement it is advisable to follow the recommendations within BS 8102:2009 ‘Code of Practice for Protection of Below Ground Structures Against Water from the Ground’. The standard advises on the types of waterproofing available and confirms the performance grade to be achieved. This project required Grade 3 protection – no dampness or water penetration acceptable.