Vess Professionals, JetX Ltd, Waterblasting Specialists
May 27, 2020
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Past Projects
Cathedral of the Blessed Sacrament was cleaned in 1998
Cathedral of the Blessed SacramentThe building had a large build up of moss and pollution on the surface. Waterblasters in the past had cleaned the surface – pitting and gouging some of the wall surfaces. The Church did not want this to happen again. JetX the licensed operator of the VESS™ Restoration Cleaning System convinced Sir Miles Warren the Architect in charge to view our Restoration Cleaning Technique. Sir Miles Warren was more than pleased with the result. JetX removed the moss and crime without disturbing any of the fragile Oamaru Stone surface.

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The BNZ Bank Building Kaiapoi was cleaned in 2008
BNZ Bank Building KaiapoiThe Red Brick of the building was coated with a clear glaze approximately 10 years ago. The Glaze was holding moisture in the bricks and creating a mould build up on the inside of the Buildings Walls. The Glaze was also breaking down and looking very milky in colour. JetX the licensed operator of the VESS™ Restoration Cleaning System used our Paint Stripping Techniques. Removing the old glaze without harming the red bricks or the mortar. This brought out the original look and let the Building breath. The Decorative Facades were repainted at the same time.

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Sarjeant Gallery Wanganui Stage One was cleaned in 2009
Sarjeant Gallery, WanganuSarjeant Gallery an Oamaru Stone Building, JetX worked on in conjunction with Goldfield Stone. The Cap/Parapet on the building which is Oamaru Stone was Tarred, Fibreglassed and Painted 20 years ago to stop moisture penetration. This over the 20 years created more problems than it solved. The Cap sealed all the moisture in the Oamaru Stone creating very bad effervescence on the walls and ceilings with water dripping on the inside. JetX Stripped the Fibreglass off by hand and then using our Restoration Techniques pulled the tar out of the stone without damage to the substrate. The moisture form inside the building can now get out and the building can breathe.

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Time Ball Lyttleton was completed in 2007
Time Ball, LyttletonThe Time Ball is a historically sensitive Building. JetX the licensed operator of the VESS™ Restoration Cleaning System first did our initial test in 2000. JetX demonstrate our Restoration Techniques to Ian Bowman Architect and Conservator. It took till 2007 before JetX carried out this work; the Stonework was heavily mossed up and very dirty. JetX used the Moss Treatment then the Gentlest Cleaning Techniques so as to not disturb any of the Historic Fabric.

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Langlols-Eteveneaux House Akaroa

Langlols-Eteveneaux House AkaroaJetX the licensed operator of the VESS™ Restoration Cleaning System removed the paint from this Historic Building in April 2008.

This Building was the first building to be built in the area in the 1840’s and historically very important. There were up to 13 layers of paint in some areas. The wood was very soft in some areas and very delicate. JetX had to be careful not to destroy the Historic Fabric of the wooden weather boards, facings etc., which were heavily grained, with exposed nail heads and original saw cuts. This was all left intact when we had completed our restoration work. It looks like it had just been built. The Painter was amazed. The building was then recoated in a light buff colour similar to that found by microscopic study of the lowest layer.

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Christs College Dining Hall

Award for Christs College Dining Hall RestorationJetX the licensed operator of the VESS™ Restoration Cleaning System cleaned the inside of the Dining Hall Oamaru Stone Walls in 2005-2006. The Walls had not been cleaned since it was built in 1914. JetX completed this job in conjunction with Goldfield Stone who replaced the deteriorating stone and McTavich Painters & Restorers who cleaned and stained the woodwork. Christs College was award a Conservation & Restoration Award for the Dining Room Restoration. This was a special job as we were working inside and had to contain and control the residual water. As the Oamaru Stone was inside in this case the restoration work JetX did brought up the surface to an almost new look.

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The Old J. Gadsden & Co Building

The Old J. Gadsden & Co BuildingThis Building had been unused for about 20 yrs. There was a thick moss build up on the bricks, a painted band through the centre, brown paint ¾ of the way up and painted Oamaru Stone along the cornices. JetX the licensed operator of the VESS™ Restoration Cleaning System applied the Moss Treatment system to the surface then cleaned the moss off. JetX then did a restoration strip where we removed the paint from the Oamaru Stone and Red Brick. As JetX removed the white band it exposed the original sigh writing that was painted on the surface. The Architect asked JetX not to remove this last layer – our techniques are so gentle that we were able to do this.

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Protecting Your Building

Why Clean?

The health of a building is not just determined by its appearance but by what is happening on the actual surface itself. Pollutants, contaminants, inappropriate surface coating and biological growths can  degrade building surfaces, which can cause permanent atheistic and structural damage to the building. read more...


Why Remove Paint?

Old buildings when they where built utilized a system for dealing with rain and damp. If the builders utilized a building substrate that allows water vapour to enter but dry out again, or ‘breath’ then this means that damp can dry out harmlessly. read more...


Why Remove Moss?

The growth of biological growths (such as algae, bacteria, fungi, lichens and mosses) and higher plants over monuments and historic buildings can be one of the major problems faced by conservators. read more...
 
About VESS

VESS Restoration Cleaning Systems provide the means for cleaning stone, brick, marble, Omaru stone, concrete and wood surfaces that is effective and which doesn’t risk further damage to the building surface.

VESS Restoration Cleaning Systems are proprietary systems developed from 30+ years experience in the cleaning restoration of heritage buildings and building requiring a sensitive and/or innovative approach.

VESS Restoration Cleaning Systems provides building owners and restorer’s access to this expertise and to best practice cleaning techniques for removal of: dirt, grime, pollutants, biological growths, paint, graffiti and other surface contaminants effectively and safely.

 
Why use VESS

Cleaning a building is often critical for it restoration, its ongoing health, as well as its aesthetic appeal.

Cleaning of a heritage or important building without understanding or giving due regard to all the consequences of the cleaning being undertaken and techniques being used can lead to the building surface being irreparably damaged. Typical damage from using inappropriate techniques, over cleaning, abrasive high pressure sand / water blasting, over use or inappropriate use of chemicals can include – destruction of the building surface, colour changes or discoloration of the surface, changes to the chemical nature and porosity of the surface. And once the building has been cleaned, incidents of re-soiling, iron mobilisation, efflorescence, vandalism and graffiti further complicate matters.

VESS Restoration Cleaning Systems are proven effective and safe, and combined with the experience of an accredited VESS Cleaning Contractor to correctly match the correct cleaning technique for particular cleaning problems, the surface will restored as desired without any risk of further damage or unintended consequences.

 

Why Clean?

The health of a building is not just determined by its appearance but by what is happening on the actual surface itself. Pollutants, contaminants, inappropriate surface coating and biological growths can cause degrade building surfaces, which can cause permanent atheistic and structural damage to the building.

 

Cleaning a building is not just for aesthetic purposes, it is required so the buildings surfaces can be inspected for maintenance or repair, and used to remove, coating, biological growths and other contaminates causing ongoing erosion and degradation to the building surface.

Although stone cleaning may result in what is considered by some to be a visual improvement, cleaning carried out by unskilled personnel or by the use of inappropriate techniques can lead to permanent damage to buildings. It is therefore important that the potential risks associated with stone cleaning methods are fully understood by the building owner, the architect, engineer, contractors, and building conservatory / heritage bodies.

We often are called into advise on building that have by damaged by inappropriate cleaning processes,  in some case we can restore unfortunately in many cases the building is irreparably damaged. We can offer technical advice if you are planning to clean your valuable building or if previous cleaning has damaged your building.

Why Remove Paint?

Old building when they where built utilised a system for dealing with rain and damp. If the builders utilised a building substrate that allows water vapour to enter but dry out again, or ‘breath’ then this means that damp can dry out harmlessly. Old building usually rely upon surfaces and mortar joints that allow ‘breathing’, it is  when the porosity of a surface is altered that problems with dampness and degradation of the buildings surface and structure can occur.
Most modern paints and coating are in many cases the hardness and impermeability of these applied materials is incompatible with the soft, porous and moving structure beneath. Non porous coatings will lock moisture in the walls, and if the coating develops tiny cracks, as a result of movement or of loss of adhesion, then water could enter and begin the process of decay: evaporation is concentrated at cracks where any salts present crystallize, causing decay.  Damp patches may appear on the inside wall as more moisture is forced to evaporate here.

Paint, by inhibiting the drying action of the exterior surface of the building, will itself encourage the rapid deterioration of Stone surfaces and age them by generations in a few short years.
If you are planning to paint a heritage building particularly with a stone or masonry surface contact us and we can advise on the suitability of your plans.

If your stone or masonry building is already painted, this may be need to be removed to restore the integrity of the buildings system for dealing with water and damp, as halt any further degradation or damage to the building.

Why Remove Moss?

The growth of biological growths (such as algae, bacteria, fungi, lichens and mosses) and higher plants over monuments and historic buildings can be one of the major problems faced by conservators. They will colonise stonework wherever conditions of moisture, light, temperature and nutrition are suitable. A general indication of stone requiring treatment is when mould, moss or lichen begins growing on the surface, causing green or greyish discolouration of the stone. Dark soiling on a surface is often equated with particulate soiling when closer inspection would reveal soiling of a biological nature

Biological growths as well as being often atheistically unpleasing, can trap dirt particles from the atmosphere, as well chemical react with the surface increasing the rate of soiling or damage of the building surface, and aiding the establishment of higher plants. These in their turn may increase water retention and block gutters and downpipes, leading to further defects.

Damage to stone may be caused or initiated by the presence of biological growths, and if these growths are contributing to the deterioration of stone, there removal is necessary to halt the process of erosion and degradation of the building surface.

Where control of growths on the surface of stone is considered necessary for reasons of safety, decay or aesthetics, it can be achieved though;

 

  • Controlling surface wetness,
  • Removal of the growths using high temperature water / steam cleaning applied at a gently at low pressure. Often this technique will not only remove algae, bacteria, fungi, lichens and mosses, but also kill the spores that cause re-growth
  • VESS biocide washes are also used in the removal of biological growths, as well as in the protection of the surface against re-growth