Recent Projects

As the level of the deck was only around 50mm below the doors, the usual specification for this type of job (using Koster Deuxan/Delta Geo Drain Quattro system externally) was not an option as there was not enough depth available. In additon to this the builder had made cuts in the membrane to fit the drainage and gutters into the slab when laying concrete over the block and beam.

This meant that the only solution available was to remove the internal gutters and apply a Polysil Anti-Lime solution over the slab, before reforming the gutters using Koster Repair Mortar Plus along with a fillet around the perimeter of the deck, and applying two coats of Koster NB1 to the complete slab, lapping it up the walls. Once this had dried we then applied 3 coats of Koster 21 with flex fabric mesh applied to the first coat over the top of the NB1, returning over the fillet and up the wall.

Reformed Gutters:-

Our recent project at the Welbeck Estate involved a combination of Koster Deuxan 2c with a Delta Membranes Geo Drain Quattro system as a protection board being utilised to waterproof the ground slabs of the new Harley Gallery at the Welbeck Abbey site.

A new basement has also been constructed adjacent to the gallery which has the double protection of the Koster Deuxan/Delta Geo Drain Quattro system externally and a Delta Membranes System 500 on the internal side. Water ingress will subsequently be controlled by a Delta V4 pumping station with alarms and battery back up systems set into the basement slab.

At this property we were asked by the owner to inspect the basement areas due to the constant dampness issues he had experienced since the basement was 'tanked' by a previous contractor. Unfortunately it soon became obvious that the work done was sub-standard, with a cementitious system having been applied to the walls with very little protection which had already started to de-bond. We even found that the previous “specialists” had not even wired up/commissioned the sump pump, which didn't make for a very waterproof system at all!

The work to resolve these problems involved considerable disturbance from removing wardrobes, door frames, bathroom/shower facilities - basically going back to brickwork and starting over again. Once stripped, Delta MS 500 8mm membrane was installed to all walls, the vaulted ceiling in the main bedroom and hallway areas. Delta MS 20mm membrane was laid over the floor after cutting out necessary drainage channels and of course wiring up a new sump pump.

Oversley Castle is a development of four existing barns, converted to a very high standard into unique luxury homes designed for 21st century living, yet retaining many of the original features, along with the transformation of an existing house and swimming pool, into a four bedroom split level high specification property.

Since our initial site visit we have carried out nearly every aspect of work within our industry, from chemical injection to all existing buildings, to treatments for Common Furniture Beetle and Death Watch beetle infestations to all retained woodwork of the barns.

The most extensive work was being undertaken to the magnificent 17c Grade II listed “Tudor Barn”, where the external ground levels were an issue on a number of the existing walls, which required the use of cementitious tanking and internal cavity membranes. The new build garages and the existing underground garages (grade 1 BS-8102-2009) which were built/converted required the use of a Type A external tanking membrane, for which a design specification and schedule was provided and the work successfully carried out in 2016.

The last of the buildings to be completed is the “Pool House” which sits in the site of what was the original swimming pool and is to become a stunning split level property with part of the accommodation below ground and the main living areas on the ground floor with a hard-landscaped roof forming part of the garden area. Thorough knowledge and understanding of BS-8102-2009 was needed to provide a design specification to cater for this new build property and a specification was drawn up with the assistance of Delta Membrane Systems, to enable the developer to be confident that when finally constructed, the entire construction would be watertight and fully protected from the ground upwards! The external membrane work has been completed and the work to the roof and internal areas is scheduled to be carried out very soon.