FAQ

What is it and where does it come from?

Richter REVOslate is a natural stone surface obtained from quarries around the world and is split from real slate. Different geographical locations result in different the colors. The raw split surface of the slate and the interchanging colors of each stone layer are absolutely unique and a stimulation for the senses. Color and surface variations are quite normal and do not constitute a fault. Natural slate has a content of minerals and metal oxidants which are not visible underneath the surface. Pressure can cause fractures. These fractures are also quite normal and do not constitute a fault. Some quarries contain a high degree of quartz combined with the slate bedrock. We use the soft rock from various quarries and from these quarries we derive our Stone-Veneer® Quartzite With different quarries having this quartz content with layers of silicate there are different color hues as seen in the Quartzite products, all with a natural glimmer and shine. Currently the available size of Quartzite is limited to a maximum size 24″ x 48″ +/- 0.2″ due to geological conditions in nature. It also requires a high degree of skill and additional “hands-on” labor to split. The natural structure of the Quartzite slate also gives it a rougher surface than slate. All of these slate products are as natural as nature created millions of years ago. RICHTER does not create or add to any of the texture, coloration, pigmentations. This is why every piece is different in stratus, three dimensional accentuation and feel, graining and variances of color hues. Do not expect to “sequence” or match any two pieces for applications. Just as nature grows no two flowers alike there is no duplication of slate. Each piece has its own natural and individual beauty.

Where does the slate become Richter REVOslate?

We actually split the slate into very thin layers while applying a glass fiber reinforced polyester resin (GRP) for a strong bond producing the backing for the Richter REVOslate sheets. Due to the high degree of adhesion accomplished between the slate and the GRP, the product now becomes stable and somewhat flexible. With the application of different backers the range of applications for Richter REVOslate increase.

What is Sandstone and Where does it come from?

Sandstone is a sedimentary rock consisting of grains of sand which mainly contain quartz. It is mined from sand pits in Northern Germany. Once mined the sand is bonded vertically with thermoplastic binders onto large sheets. The color variances of the sand are from white quartz to dark brown. We do not “place” the colors, it just occurs naturally. Sandstone is approximately 90% pure quartz and a versatile product. It is applied to a fabric mesh-structure allowing for great flexibility. Sandstone is approximately 90% pure quartz and a versatile product. It is applied to a fabric meshstructure allowing for great flexibility. This natural product is the classic in our stone product portfolio. Produced with great efforts and only from selected and suitable sand pits. The relief-like progressions of the sediment layers make each sheet a very unique piece. Thickness also varies for the Slate from 1mm to 2.5mm +/- because of the three dimensional surface texture.

What are the different backings and What adhesives do they use?

– GRP (Glass fiber Reinforced Polyester resin) This is the standard backing for all Slate and Quartzite products. It is durable and recommended for exterior as well as interior use. One type of adhesive used with this backing is PUR (short for PolyURethane). PUR adhesives are found in most woodworking businesses commonly known as PUR Hot Melt adhesives. This adhesive is typically applied from a heated cartridge or roller coater. It is applied hot (about 250°F is typical) and sets quickly as it cools. PUR Hot Melts are used for general assembly and lamination of panels. PU adhesive (short for PolyUrethane) is a liquid Polyurethane and is applied at room temperature. They normally offer excellent water resistance. Franklin’s Polyurethane Wood Glue and “Gorilla Glue” are some examples of liquid polyurethane. Most people are familiar with the cartridge dispensing applications of PU commonly called construction adhesive such as Liquid NailsTM . Ceramic tile adhesive is another form of PU. – Fleece This is the standard backing for Richter REVOnano and an optional backing for Slate and Quartzite. Although durable, it is not recommended for exterior use, only interior use. The fleece backing is perfect for contact cement as used in about every woodworking and cabinet business. Also good for any typical wood glue. When using with any hot or cold hydraulic veneer press it is best to place some kind of rubber between the Stone-Veneer and the metal plate. This way the pressure will distribute evenly compensating for the three dimensional surface. Any PUR adhesive will work as well.

Who installs Richter REVOslate?

The equipment required for cutting and trimming Stone-Veneer®, Sandstone is common carpenter and home-owner tools. A circular saw with a carbide tipped blade. Any hand held router with a carbide tipped cutting tool. A little bench-top table saw and a portable miter saw with carbide tipped saw blades. All of these tools are available at any home improvement store, hardware store and lumber store. The answer to the question is anyone can install it. A professional carpenter would be the first choice. A painter with wall paper experience can also install it. Mr. and Mrs. Homeowner can do it as well as their D.I.Y. friends. That tells you it can be used anywhere for anything by anybody. This is a very, very broad based market.

What is Sealer

A sealer cures as a film on the stone surface. Since the material is actually covering the stone, the appearance of the stone surface may be altered by the application of this type of product. This material will provide somewhat of a sacrificial layer over the stone, and will absorb most of the wear on the countertop. Since the sealer is softer than the stone, normal use of the countertop will result in abrasion of the sealer surface and dictate reapplication to maintain the original luster of the surface. A properly applied topical sealer will normally reduce, although not eliminate, the vulnerability of calcareous stones to attack from mildly acidic solutions. General Precautions. When any surface protection product is used, care must be taken to read and follow the Manufacturer’s written instructions accurately. This will provide the greatest benefit from the application and will guarantee safe handling of the product. If you still need more information about care and maintenance or go to “Care & Maintenance”; page or email us your questions.

How do I prevent staining on Natural Stone?

Most stones are porous and readily absorb liquids and moisture. Materials like limestone and sandstone are extremely absorbent, whereas granites and serpentine (green marble) are denser, but will still absorb liquids that are allowed to remain in contact with them for extended periods of time. The use of a sealer will help prevent staining in most situations. Even a sealed surface can stain if left in contact with a staining agent for a long period of time. Therefore, all spills should be wiped up as soon as possible, and coasters or napkins should be set when serving food or drinks on a stone bar, table, or counter top. Soft drinks, coffee, tea, and fruit juices contain mild acids and can etch the polished surface of a stone and stain quite rapidly. These should be cleaned off immediately with mild soap and warm water.

How much material do I need to order for my jobs?

Before making final selection of a stone, take wastage into account to make certain there will be enough material to complete the project. An often-forgotten fact is that the material from a quarry today may be different from what was available six months ago. Further, there may be more than one quarry of the material. It is always recommended to order what is typically referred to as “attic stock”, a little amount of material to be kept on the side if future repairs are needed.

What is Quartz?

Quartz is the second most abundant mineral in the Earth’s continental crust, after feldspar. It is made up of a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2. There are many different varieties of quartz, several of which are semi-precious gemstones. Especially in Europe and the Middle East, varieties of quartz have been since antiquity the most commonly used minerals in the making of jewelry and hard stone carvings.

What is Slate?

Slate is a metamorphic rock exhibiting “slaty” cleavage, which allows it to be split in thin sheets. Slate is formed in the water of rivers and ponds from clay accumulating in thin, flat layers at the bottom of these waterbeds. Slates are softer than granite and therefore vulnerable to scratching and abrasion. Slate has a natural cleft (not a smooth surface). The same precautions mentioned for marbles with regard to damage should be applied to slates.

What is Natural Stone?

Natural Stone is not manufactured; it is a product of nature. Blocks are removed from the quarry, slabs are cut from these blocks, and the slabs are further fabricated into the final stone to be installed. Each block is different; each slab is different. Skillful blending or matching of the dimension stone blocks, veneer panels, tops, etc., results in a beautiful blending of nature’s variety and man’s design. In contrast to the uniformity of materials produced by machine or assembly line, stone’s naturally varied appearance has wonderful character. “Uniformity of material,” when applied to natural stone, is a term of relative value that needs to be understood when making a selection.

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