RESTORING THE PAST, CONSERVING THE FUTURE
Stone Restoration
Remmers Restoration Mortar system - stone substitution and reproduction
Broad application range:
The Remmers Restoration Mortar system was specially developed for supplementing mineral building materials or replacing them.
As the composition of mineral building materials can vary greatly (structure, pore space, colour, grain etc.) and the substitute mortar needs to be matched to the subsurface for long-term measures, Remmers offers a very comprehensive pacakge that meets the large number of application cases. Its structured design allows users and architects to select a Restoration Mortar that is ideally matched to the structure.
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There are two strengths available for all cement-based restoration mortars.
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All restoration mortars are available in three grains sizes for optical matching.
Binder
Only quality-tested and high-quality raw materials are used to produce Remmers Restoration Mortar. The binding agent usually comprises of several raw materials. These include different cements and also different limes. To adjust specific properties, dispersion additives are used. This applies in particular to Remmers Restoration Mortar SK that can be processed ‘until it peters out to nothing’.
Primer mortar
In the case of deeper flaws, we recommend using ‘primer mortars’ that have been specially developed for this task. Special steps must be taken to ensure a balanced strength gradient from the inside outwards.
Therefore, specially designed primer mortars are available for the restoration mortars. The Remmers Primer Mortar ‘soft’ also has salt accumulating properties.
Restoration render
Durable special renders for the optimum protection of the building
Buildings change. Dirt and air pollutants collect on the façades over time. Moisture can penetrate. If renovation work is scheduled the façades are usually cleaned, but sometimes this is not enough.
Over the years salts build up that cannot be removed by cleaning. If the render is replaced in these cases, the undercoat and the top coat must be able to deal with this damage potential as sustainably as possible.
The task of restoration render systems is to ensure a dry and efflorescent plaster surface for a long period and offer the brickwork long-term protection by allowing the salts to be stored in the plaster and therefore removed from the brickwork.
To achieve this, restoration render systems work in one of two ways:
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Restoration renders are water repelling but also highly breathable. This relocates the evaporation level from the surface into the plaster cross-section
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Undercoat renders assume the function of a storage layer. Liquid moisture and the soluble salts it contains should be able to penetrate the render and leave the salts
in the undercoat when the restoration render diffuses
Remmers Restoration render systems are optimally suitable and proven. The permanently water repelling and highly breathable restoration render allows the brickwork to dry out, but keeps back the salts so that no efflorescence occurs. If there is a high level of salt, the surface can be equalised with a (pore) undercoat render that allows the salts to crystallize without causing damage. Alternatively, Remmers compress render, which is breathable and capillary-active, can be applied as a real dehumidification render. It ensures permanent moisture regulation and with 60% more pore volume, it offers enough space to store salts.
Active principle of the restoration render - single-layer
Relocation of the evaporation level for the moisture in the masonry from the cleaning surface into the render layer. Restoration renders are water repelling and highly breathable at the same time
Active principle of the restoration render - dual-layer
Salts coming from the masonry are stored without damaging the render. The undercoat render is not water repelling so that, thanks to 50% more pore volume, the salts can penetrate and the render offers enough space to store the salts without causing damage.
Active principle of the compress render
In contrast to restoration render, there are no water repelling properties to ensure dehumidification and desalination. The render receives an even larger pore volume to store / or let through as much salt and moisture as possible, and discharge them quickly and efficiently to the air.
Monument Restoration & Preservation
Permanent protection of valuable cultural assets
Monument preservation is the most prestigious of all building protection disciplines. Be it detailed structural analyses of buildings by the Remmers specialist planning department or special product solutions for durable building protection - the portfolio of the Remmers is diverse. With more than 65 years of experience in monument preservation, we have in-depth expertise in historical construction methods and materials.
The aim of monument preservation is to sustainably preserve cultural monuments. Cultural heritage is extremely important for society so we can identify with our history based on material and perceived historical treasures and form our social identity. Monuments are essential for us all.
Anyone who masters the difficult task of preserving monuments both technically and also with an eye to conserving the substance of the building, are capable of solving problems that normally occur in problematic monuments. Such as repairing façades, installing permanent waterproofing of buildings, likewise wood preservation.
Concrete Repair
Permanent protection of valuable cultural assets
Despite the high quality and special qualities of concrete, damage can occur that requires maintenance, repair and protection. A distinction must be made between environmental influences and production faults with respect to concrete damage. Environmental influences can include exhaust fumes, acid rain, frost and de-icing salts. Here, the chemical properties are changed so that the steel reinforcements in the concrete start to rust. Shrinkage cracks, pipes, gravel pockets and insufficient concrete cover are typical production faults that also promote corrosion of the reinforcements.
Due to the wide range of potential causes of the damage and the damage profiles on reinforced concrete structures, different repair principles have been practised for many years. These are documented in the guidelines ‘Protection and repair of concrete parts (repair guide lines’ by the German Committee for Reinforced Concrete (DAfStb) and the Euro norm series EN 1504 (in Germany DIN EN 1504) ‘Products and systems for the protection and repair of concrete structures’.
The correct planning (structure design and details) and also the selection of building materials and careful construction all have a huge impact on the durability of a construction work.
Protection against driving rain
Reliable protection for dry brickwork
Water plays a central role in the weathering of mineral building materials. The purpose of a hydrophobic impregnation is to significantly reduce the capillary water absorption, e.g. where areas are exposed to rain or splash water. It is a sensible damage-preventing (prophylactic) measure, if the capillary absorption of precipitation or splash water is the underlying cause of damage or if it leads to an acceleration of any existing damage. With a reduction of the moisture content, improvement is made to the heat insulation of the façade brickwork. A Funcosil hydrophobic impregnation allows you to protect brickwork against damage and save valuable energy.
Regardless of the composition of the active ingredient, the effect of hydrophobizing impregnation aims to reduce the adhesive forces between the pore walls and penetrating water molecules. By reducing the interaction, the capillary suction that normally exists is decreased. The range and properties of an hydrophobic agent based on organosilicon is very large. The chosen material should therefore be matched to the requirements of the substrate. In the past, hydrophobic agents were always liquid and were only suitable for weakly absorbent bricks. Remmers has solved this problem with the Funcosil FC cream technology that gives all surfaces the time it needs to absorb the necessary protective active ingredient.
What is hydrophobizing? Water resistance and vapour permeability
A thin glass tube is placed into a basin of water. Capillary forces will cause the water in the glass tube to rise. If the glass tube is made hydrophobic, the effect is reversed and the water is no longer ‘absorbed’ but is pushed out.
As this is the result of only one nanoscale molecular layer of the Funcosil impregnation in the walls of the pores, the transportation of vapour is practically unrestricted. It does not compromise the diffusion capability.