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Specialised Electro-Osmotic Damp Proof Course for new Outpatient Centre

Historic Restoration with Modern Methods

Peter Cox has been contracted to treat woodworm and fungal decay on a major refurbishment project in Huddersfield. Acre Mill is a listed wiremill which adjoins Huddersfield Royal Infirmary, and will eventually become a new outpatient centre. Peter Cox Yorkshire office is responsible for the project. Branch Manager Gary Laird said: “Acre Mill was once regarded by locals as the biggest mill in the world as it went three-quarters of the way around the “Globe” – the name of the local pub, now known as The Nightingale. The contractors are keen to preserve as much of what is left of the original structure as possible and with our considerable experience working with historical buildings, Peter Cox was the obvious choice.


Upon investigation of the rafters, the Peter Cox team found woodworm infestation and fungal decay. Woodworm-treatmentSome of the rafters were also damaged and split and the ridge was completely missing in places and provided no structural support. There was also further decay by Wet Rot to some of the rafter feet, wall plates to the front elevation and to several trusses. Wet Rot is caused by a number of Basidiomycetes fungi and attacks both softwood and hardwood. It usually occurs in persistently damp conditions and has been known to hollow out giant beams and is responsible for much of the wood decay within buildings.

In addition, the Peter Cox team also found evidence of infestation by the Common Furniture Beetle (Anobium punctatum) to all trusses. This wood-boring insect is responsible for about 75% of all woodworm damage in this country and will attack softwood and hardwood.Lectros Treatment In order to repair the problems, Peter Cox removed and replaced the timbers and all surfaces and then contact masonry was capped in a damp proof membrane. A stainless steel threaded bar was inserted from the top of the principle rafter into the two supporting blocks underneath and resin bonded to the timbers. A new wall plate was machined and fitted and all surfaces that contact masonry were capped in an appropriate damp proof membrane.

New rafters were fitted from the first purlin to bear onto the new wall plate and new purlin were formed from specialist timbers. The purlin was installed and the splice section of truss resin bonded back into place. All other timbers had high moisture content and also showed evidence of the common furniture beetle and so the team treated the bearing ends with a Deep Kill Timber Gel to prolong their life. We also injected Deep Kill Timber Gel into the bearing ends and fitted a plastic cap to prevent leakage. On the maisonette level, the team treated decay from Wet Rot by removing floor boarding, tongue and groove boarding and decayed stonework. A new beam end was formed from structural grade Douglas Fir and all surfaces came into contact with masonry were capped in a damp proof membrane.


Perfect for Heritage Buildings

Gary Laird said: “When dealing with rising damp in thick stone and brick masonry, and especially rubble-filled walls, Peter Cox advise using a remedial damp proof course using our Elektro+ Osmotic System, which is particulary ideal for historical buildings.” In the 18th century, a physicist named Reuss found that water moved from a positive to a negative cathode when an electrical current was applied.

Today the science has moved on considerably and by introducing a very small positive electrical charge on the wall it repels the rising damp moisture molecules down the walls and back into the ground. It is perfect for heritage buildings as it causes minimum disturbance and is ‘reversible’, making it acceptable to leading conservation and heritage organisations. No liquid chemicals are used so the wall is quicker to dry out and it does not cause problems on party walls. It is chemical free and immediately effective and can even be fitted with a monitoring system for additional reassurance.

Gary adds: “This completed development will provide a new 56,000 sq. ft. centralised outpatient centre, expected to serve over 200,000 outpatient appointments every year. It is due to be operational by mid-2014 and Peter Cox isdelighted to have played a part in securing the future of this old building for future generations.”




Restoration of Lisahoppin House

Nineteenth Century Splendour

This large, old house, dating from the 1860’s was an at risk gentleman’s residence, which had deteriorated due to being left vacant and unattended for a long period of time. Initial work consisted of complete re-roofing of the existing two-storey main house, construction of a new extension, internal refurbishment including upgrading of services.

The integration of steel work to Lisahoppin House ensured the buildings structural integrity and allowed the installation of precast concrete floor slabs at first floor level and precast stairs. The timely completion of bespoke timber conservatories and kitchen were critical to the success of this project along with exacting standards of craftsmanship.

Stronghold Preservation

Stronghold Preservation were contacted by the contractor, who requested a damp & timber survey for the entire house. On inspection, Stronghold Preservation found that there was rising damp in the external solid brick walls, and wet rot in various places. Active woodworm was also found in the first floor joists.

Wykamol Affiliated

Stronghold Preservation has nearly 30 years successful trading experience working on some of the most prestigious historical buildings and structures in Northern Ireland and the Republic of Ireland such as Dunluce Castle, Carrickfergus Castle and Malahide Castle to name a few. More recently the company has worked on unique projects in England and Scotland, such as Claridges Luxury Hotel in London.

They have worked closely with leading product and system manufacturers from The Wykamol Group, with the aim to develop a range of services and repair methods that are discreet or aestheticly pleasing, which maintain the historical integrity, increase the lifespan of the building or structure, are cost effective and minimise the disturbance to the fabric of the building.


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Complexul Brancovenesc

Lectros Chosen For Romanian Heritage Center Restoration

Lectros Chosen For Romanian Heritage Centre Restoration

Work was recently completed on one of Romania’s most important heritage buildings. The Complexul Brancovenesc is a 300 year old group of buildings situated in the the historical Romainian region of Wallachia. The Lectros Osmotic System was chosen from numerous solutions to correct extensive rising damp in two of the buildings in the complex – the Casa Domneasca and the Staretie.

How Lectros Works

The Lectros Electro Osmotic Damp Proofing System is a virtually invisable repellant of rising damp for properties of any age or structure using tiny electric anodes.

      Lectros - Initial switch on conditions

After the titanium damp course has been fitted using 2mm diameter wire, a small voltage is applied to the titanium via the power unit. Immediately all the titanium wire in contact with the wall and anode sections conducts electricity.

The net result is the equivalent to having one continuously conducting anode so enabling a very rapid build up in the wall potential.

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After a period of time an insoluble film of titanium dioxide builds up at the titanium/wall interface. Once this film has become established there is very little further electrical conduction from the titanium and corrosion ceases as long as the protective voltage is applied. The anodes will naturally continue to conduct so maintaining the wall.

To summarise, it can be said that the Lectros system is virtually self-healing – scratch or abuse the titanium and it will quickly form another protective skin.

  Lectros - Normal Operation

The Complexul Brancovenesc

The massive building built from stone, are of a 18th century monestarial design and was commissioned by Prince Constantin Brâncoveanu, the ruler of Wallachia between 1688–1714. Work was completed by his nephew, Mihail Cantacuzino who within included a royal court, prison cells and a display area for the families many works of art.

The complex can be seen in the town square of Râmnicu Sărat.





Renovation of Custom House in Derry

Renovation of Custom House, Derry.


Londonderry, Northern Ireland.

Stronghold Preservation, as a specialist damp proofing company, was asked to submit a tender for remedial works during the major renovation of the Custom House, Derry. Due to the successful tender submission, Stronghold Preservation carried out an electro osmosis damp proof course, cementitious tanking and woodworm treatment on the Custom House.


Electro Osmosis DPC

The architect had specified that an electro osmosis damp proof course be installed, to remedy the rising damp problem.  Electro osmosis was the chosen damp proof course, as it is generally a more suitable remedial damp proof treatment for rising damp in solid stone walls.  A 20 year guarantee was issued for the remedial damp proof course.



Cementitious Tanking

Due to the external ground levels being slightly higher than the internal finished floor in some places, the architect had specified certain areas to have cementitious tanking carried out.  A 10 year guarantee was issued for the tanking.


Woodworm Treatment

Also included in the tender was woodworm treatment, carried out to the first and second floor joists, and the timbers in the roof: all affected areas were sprayed with an insecticide.  A 20 year guarantee was issued for the woodworm treatment.



The Custom House, since its refurbishment, operates as a restaurant and wine bar.  It was built in 1876 and is a Grade B1 listed building.


Damp Solved At Prestige Development In Chester

Damp Solved At Prestige Development In Chester

The Gunnery has stood for several centuries and forms a distinctive landmark at the centre of Tarvin village. The Gunnery include a general store , a cafe and a bakery as well as buildings in the rear courtyard.

Whilst the shop has continued to trade other areas of the Gunnery have gone into decline, the bakery has not been operated for the past 30 years and the buildings in the rear courtyard  have fallen into a state of disrepair . In 2005 Matrec Developments Ltd acquired the site were given the task of regenerating the area.

The Problem

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The Gunnery presented a significant challenge. Due to the site being a prominent and important conservation area it was integral to the project the buildings were restored to their previous glory whilst maintaining their integrity. So when the structures needed damp proofing traditional techniques were not warranted.

The Solution

Wykamol Groups Lectros System was recommended to Matrec through one of their associates as it is their preferred choice when dealing with damp proofing. The system introduces a very small current into the wall through a series of anodes inserted into the brick wall. Its effect is to repel the rising moisture downwards though the wall harmlessly back into the ground. This technique provides little disturbance to the buildings structure.


Matrec have been awarded the Chester Civic Trust award for the quality of work that was done on the Gunnery development. The project was also recognised by the RICS and was made a finalist in the  North West Building Conservation Awards 2009.




Lectros solves damp problems in Cambodia

Lectros Solves Damp Problems In Cambodia

When specialist renovation company Hammersmith’s of Bangkok came up against severe rising damp problems in an old colonial house, they called in the specialists Lectros International Ltd.

Hammersmith’s were in the process of renovating the Australian Ambassador’s residence in Phnom Phenn, Cambodia when they realised the deterioration in the plaster was being caused by rising damp.
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After looking at many systems on the market they decided the non-chemical Lectros system would be the most effective and sympathetic system to install, in an old French brick built colonial house.

Floor plans were sent to Lectros International Ltd to design what eventually became two systems to be installed to the ground floor.

The design and method statement were then submitted to the architect for approval. Upon approval, Hammersmith’s who were wanting to become an approved installer for the Lectros system, flew out an installation technician from Lectros International to carry out the contract and at the same time train their team up to become approved installers.

The two Lectros systems contained a total of 140 anodes, split equally between two power supplies and took just over a day to complete the installation. Both the contractor and the client couldn’t believe the speed and the cleanliness of installing the Lectros system.

This is just one more property of architectural importance that won’t be suffering from a rising damp problem in the future.



Lectros Complete Kelingrove Art Museum Renovation

Lectros Complete Kelingrove Art Museum Renovation

Lectros are pleased to announce we have supplied and site managed the Kelingrove Art Museum in Scotland working with our approved contractors Wise Preservations. This was a complicated job as the external construction is dressed sandstone and the architects in chage of the restoration insisted that the damp proof course could not affect the outside face of sandstone so all the damproofing works were done from inside.


The walls were 3 feet thick so special anodes had to be used and these had to be powered in multiple systems, to keep the system working to its optimum performance.

As you can see from the images this is a beautiful and historic building and one that lectros are pleased to be associated with.

20mm holes were drilled and the damproofing anodes installed, which was then backfilled with a lime grout to optimize electrical conductivity.

The Kelvingrove Art Gallery and Museum is a museum and art gallery in Glasgow, Scotland. The building houses one of Europe’s great civic art collections. Since its 2003–06 refurbishment, the museum has been the most popular free-to-enter visitor attraction in Scotland and the most visited museum in the United Kingdom outside London.

The gallery is located on Argyle Street, in the West End of the city, on the banks of the River Kelvin (opposite the architecturally similar Kelvin Hall, which was built in matching style in the 1920s, after the previous hall had been destroyed by fire). It is adjacent to Kelvingrove Park and is situated near the main campus of the University of Glasgow on Gilmorehill.

The construction of Kelvingrove was partly financed by the proceeds of the 1888 International Exhibition held in Kelvingrove Park. The gallery was designed by Sir John W. Simpson and E.J. Milner Allen and opened in 1901, as the Palace of Fine Arts for the Glasgow International Exhibition held in that year.

It is built in a Spanish Baroque style, follows the Glaswegian tradition of using Locharbriggs red sandstone, and includes an entire program of architectural sculpture byGeorge Frampton, Francis Derwent Wood and other sculptors. The centrepiece of the central hall is a massive Pipe Organ installed by Lewis & Co.

There is a popular myth in Glasgow, that the building was accidentally built back-to-front, and the architect jumped from one of the towers in despair, when he realised his mistake. This is only an urban myth. The grand entrance was always intended to face into Kelvingrove Park.

Kelvingrove was reopened by Her Majesty Queen Elizabeth II on 11 July 2006 after a three-year closure for major refurbishment and restoration. The work cost over £28m and includes a new restaurant and a large basement extension to its display space to accommodate the 8,000 exhibits now on display.


Lectros Osmotic DPC – Highly Effective and Independently Approved

Lectros Osmotic DPC – Highly effective and independently approved

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The Lectros Osmotic DPC System is used across the world as a highly effective treatment for rising damp. The Lectros Osmotic DPC System has been tested and approved by CSIRO Appraisals, a founding member of the World Federation of Technical Assessment Organisations. (See attached CSIRO Report).


Lectros is the best way to solve your Rising Damp Problem because:

The Lectros Electro Osmotic System is not a masonry capillary coating or blocker, but a proven active method of reversing the moisture’s natural electric potential, which originates when water rises in a masonry wall.

The Lectros System is safe, simple and 100% effective!

The Lectros System dries below the installation height protecting masonry supported timber floor structures. Lectros repels moisture down to soil level below timber joists and bearers even when installed behind or above skirting boards, (where access below suspended timber floors is restricted). (An electro osmotic system is the only remedial damp course that will dry below the level of installation avoiding timber floor removal and replacement.)

The Lectros System desalinates masonry, solid plaster and render.

The Lectros System is clean, free of odours, perfectly safe, environmentally friendly, and, being fume and chemical-free, it cannot stain or discolour masonry or plaster.

The Lectros System minimises the need to remove sound plaster or render as most dissolved hygroscopic ground salts are carried back down into the soil

The Lectros System treats common or party walls, (without damaging your neighbours side of the wall), solid walls up to 600mm thick, and both sides of cavity brickwork walls from one side.

The Lectros System is suitable for any type of masonry, clay brick, sandstone, limestone, rubble filled, aerated concrete, precast concrete – even mud brick dwellings!

The Lectros System is simple and quick to install.

The Lectros System repels moisture down to soil level below timber joists and bearers even when installed behind or above skirting boards, (where access below suspended timber floors is restricted).

The Lectros System provides, observably, the fastest results as the damp is actively “driven” down out of the walls unlike other systems that rely solely on “passive” evaporation!

The Lectros Electro Osmotic Remedial Dampcourse System is a highly cost-effective alternative to all other correctly installed methods.

12. Lectros 12 page brochure Jan 2010

A review of the theory of Osmotic Damp proofing


For more details on this unique system please download the datasheets above. To place an order, or for technical enquiries please contact our sales office on 0845 4006666 or e-mail salesdepartment @wykamol.com . For export enquiries please e-mail your details to  export @wykamol.com

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