Although there has been a substantial property on the site since 1791, Armsworth House in Hampshire dates from circa 1862. MacLennan were called in to provide internal cellar waterproofing to the vaulted winebasement cellar. Whilst there has been no history of flooding in this cellar, the client required it to be completely waterproofed and dry from any moisture or water, including condensation.
The cellar is of brick construction with a vaulted ceiling and brick paviour flooring. MacLennan technicians formed a sump hole and installed the sump chamber and sump pumps. We also formed the chase and installed Maclennan's basedrain channels into the floor chase, before installing Maclennan mesh membrane to the floors, walls, wine bin shelves and dividers ensuring all sides were done up to the vault crowns. Once all the membrane had been installed we fitted plasterboard to the walls and plastered all vertical and horizontal surfaces including the vault crowns and laid flooring grade chipboard to the floors.
Our client required the vault to be a useable addition to their property and the result of using experienced specialists such as Maclennn ensured that the vault cellar was completely waterproofed, with pumps to ensure any water coming into the property is pumped out before any damage can be done to the vault.
If you require cellar waterproofing or basement waterproofing in the Hampshire area please call us to discuss your requirement.
Further benefits of using Maclenan:
We accept design responsibility for the system if designed and installed by us.
We give insurance backed guarantees.
Ensure compliance with all relevant standards.
We do not use sub-contractors for specialist work – only our own fully trained staff.
We are recommended, trusted and endorsed by the foremost market leading architects, engineers and building contractors.
Habitable basement apartment, Devon Maclennan waterproofing systems used as a robust flood control system to prevent flood damage return and to habitable use.
This property is a cottage on the banks of the river Yealm. It is over 3 floors, with steps leading to a slipway and the beach. The property contains a basement apartment that in times past was used as a boat house, but has been converted into a habitable basement. Maclennan were called in to specify another waterproofing company's mistakes. The system had been installed incorrectly which meant that instead of having a habitable living space, for the past 18 months, the home owners were facing water ingress of approximately 5,500 litres per hour, which is 92 litres per minute.
Following a site visit, Maclennan's experienced waterproofing surveyors designed a waterproofing system to fit in with the re-usable aspects of the failed system, such as the base drain. It is always our aim to say our customers money where possible, as long as it doesn't impact on the quality ot the installation. As. if not fitted properly to our specifications by our qualified technicians we are unable to offer our comprehensive guarantees. The Maclennan 08M system was applied floor to ceiling and our 20M System was applied to the floor We also installed a Maclennan Hydro Sump Pro and 4 CWP 750 pumps two main pumps and two back up pumps. The CWP 400 is capable of discharging 300 litres of water per minute, which can adequately manage to discharge the 92 litres per minute rate of water ingress that comes in at high tide.
This Basement apartment is now a flood and water free habitable area, with the most comprehensive guarantees and insurances available protecting the client. The project shows the importance of using a specialist waterproofing contractor such as Maclennan If you use us from the beginning of your project to design, supply and install the appropriate waterproofing system, you can be assured of a waterproofed, liveable area that carries the most comprehensive guarantees and insurance available. We can ensure that any area is completely water proofed including somewhere that has a river coming in twice a day!
On the weekend of the 17th and 18th of November we headed over to the Bath & West showground to take part as an exhibitor in the Homebuilding & Renovating Show 2012. We had already set up our stand on the Friday evening with our green roof model and our cavity drain system model. The cavity drain system model showcased what system we put in place in a basement, including a sump pump and flooring. With the Green roof model we were showcasing a cut away model of what a green roof and its components would look like. So armed with a stack of brochures and leaflets with samples of Polyprufe (part of our polyurea range) we were ready to meet the approximately 5,000 self builders and major renovators who were expected. The self building and renovating market is worth approximately £270 million per year in the uk and according to the show organisers 82% of visitors have a project that is live or starting in the next 12 months.
The show started at 10 am and by 10.15 we were inundated with visitors, our green roof showcase which included our Dekogrip finish was a huge draw with a lot of visitors interested in learning more about it. Throughout the two days we had a steady stream of visitors many of whom had brought plans of their properties to show us. On Sunday our Managing Director did a master class on Basement Waterproofing. I left as soon as he had finished and in the few minutes that it took me to get back to the stand, there were already people there who had seen the masterclass and wanted further information!
All in all it was a successful exhibition for us and we thoroughly enjoyed our two days talking to people who were building or renovating their dream homes – and who mostly knew exactly what they were looking for, but were open to new ideas and being advised on the correct way to waterproof a basement. We also got to connect with a variety of professionals who were interested in both our basement design and green roof systems, they were also interested to realise that if we design, supply and install the basement waterproofing system that we can offer extensive guarantees which obviously protect both themselves and their clients.
Reduce the cost of basement construction without reducing waterproofing!
Creating a type B integrally waterproofed basement can be achieved far more effectively, and for less cost, than by using additives and additional steel reinforcement. Type B is notorious for leaking.
We work for waterproof additive companies, repairing failures with our injection systems and cavity membranes. Waterproof additive companies often have to employ injection specialists to put right their frequent failures. Additives do not stop leaks through cracks, honeycombing and joins. The additional reinforcement and joins required by most additive companies add unnecessary cost to the construction.
If you have a leak after construction phase, the additive companies will not return until fixtures and fittings and even internal walls are removed at the clients expense. They will not accept consequential damages.
A concrete structure without waterproof additives but with well compacted concrete and no honeycombing and well prepared (scabbled) joins with correctly specified reinforcement water bars will provide a Type B structure.
A concrete structure with additives and reinforcement to BS8007, but with less than adequate workmanship in any small area will leak. Honeycombing occurs due to lack of accessibility to poker due to the amount of steel. Water bars are difficult to detail and install surface prep of joins is difficult due to steel.
The Maclennan method does not affect programing which can save thousands. Our water bars are installed into ordinary concrete to BS8102 saving at least £20/m2 on additional steel, labour and additives.
The well placed concrete is compacted correctly around the properly installed water bars and crack inducement.
The work is inspected for honeycombing and cracks by either the engineer or MacLennan surveyor. Defects are repaired locally ( as they should be anyway ) All surfaces are then coated with a crystalline slurry which effectively waterproofs the concrete and promotes self healing up to 150mm into the concrete.
For Habitable type B basements a cavity drain system is installed. This is crucial to comply with BS8102 and get meaningful 20 year guarantees and insurance that covers consequential damage.
Old damp basments can be converted into dry habitable warm areas with athe right design and waterproofing. They are so often inappopriately waterproofed. Old brickwork in lime mortar basements and cellars should not be waterproofed with cement based products or resins.
Anything that relies on a bond to the substrate to resist water pressure cannot or at least should not be applied to friable lime mortar or old soft brickwork. This is an obvious basic building principle so often ignored by building professionals and waterproofing companies.
A well designed and installed waterproofing system would be a cavity drain membrane directly onto the brickwork or a spray applied shotcrete type systems to form a structural shell within the basmeent, which could then be waterproofed with a cement based system directly on the new concrete shell.
Ensuring that a basement or cellar is suitably waterproofed enables a property owner to extend the useable square footage of a property without building up or out - the space is already there to be used, it is just a case utilising the correct waterproofing measure to ensure it stays dry and functional.
Look below for a glimpse of what a converted basement or cellar could look like once waterproofed correctly and ready for Multi-usage:
DOMESTIC BASEMENT, WILTSHIRE Newton System 500 used as a robust flood control system to Prevent flood damage and treat damp.
HISTORY
This gorgeous cottage in Wiltshire required a robust flood control system to prevent it from flooding and to control the damp in the cob and stone walls. We were engaged by the cottage owner to carry out a site survey and to specify The necessary work to provide a guaranteed cure for flooding and to remedy a Damp problem.
METHODOLOGY
Our fully qualified staff carefully removed the stairs and floor. A concrete floor was installed with a Newton Basedrain set in at the wall floor junction and draining out at the front of the building. Newton 508 Cavity Drain membrane was installed over the concrete floor and Newton 508 mesh membrane over the walls, which were then finished with plasterboard. We also then refitted the stairs and joinery items.
RESULT
The cottage is now permanently free of the risk of flooding and the walls are decorated and free of damp.
ADVANTAGES OF USING MACLENNAN:
The contract designed and carried out by us under our insurance cover and PI.
Carries our 20 year guarantee.
The system was installed over friable stone and lime mortar where any other system such as cement, epoxy based systems would not be suitable.
The system could be ventilated to allow the walls to “breathe”
A large basement under a luxury property in Poole Dorset.
There was a stream running through the site to the sea. The waterproofing was designed by Maclennan and covered by Maclennan PI and Products Insurance. To comply with BS 8102 the ground had to be drained by means of land drainage. The outside of the building was protected with Grace Procure and Maclennan Geo Drain installed over the walls and draining to land drains at the toe of the footing.
The basement in Wilton was filling up with water so quickly that water from the basement springs was flooding out through the door and into the road in front of the house.
Maclennan installed a Cavity drainage system which channelled the water from the points of ingress into two sumps with powerful NP400 pumps individually piped to the outside for maximum performance.
Rivermead House basement flooded most years. Petra Developments needed to dig the basement out by a further 800mm to increase the head room for accommodation.
MacLennan were contacted by Adams Architecture, who MacLennan regularly works with on Projects. To provide a waterproofing design for this large detached property in Hampstead.
The client was refurbishing this very large country house. The cellars flooded to 600mm deep every year. The Maclennan qualified surveyor proposed the use of the Maclennan Cavity Membrane system and drainage to sumps and pumps.
Consero Homes contracted MacLennan to work with their Architect on the design of the waterproofing of this large property in Weybridge, Surrey. MacLennan have worked with Consero Homes on several projects, and we were glad to offer design expertise.
MacLennan worked closely with the Architects at Ascot Design to provide a robust waterproofing system that complied fully with BS8102 and was covered by Maclennan PI. MacLennan won the installation work at competitive tender.
Although there has been a substantial property on the site since 1791, Armsworth House in Hampshire dates from circa 1862. MacLennan were called in to provide internal cellar waterproofing to the vaulted winebasement cellar. Whilst there has been no history of flooding in this cellar, the client required it to be completely waterproofed and dry from any moisture or water, including condensation.
This property is a cottage on the banks of the river Yealm. It is over 3 floors, with steps leading to a slipway and the beach. The property contains a basement apartment that in times past was used as a boat house, but has been converted into a habitable basement. Maclennan were called in to specify another waterproofing company's mistakes. The system had been installed incorrectly which meant that instead of having a habitable living space, for the past 18 months, the home owners were facing water ingress of approximately 5,500 litres per hour, which is 92 litres per minute. 
