Services – Flagstone (Exterior and Interior)

Cleaning • Coating • Restoration

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The term "Flagstone" actually refers to the cut of the stone, not the type of stone. Flagstone is almost always a Sandstone. Flagstone refers to the cuts and the installation with large irregular shaped pieces of stone and large grout lines. Any stones can be cut and installed as a Flagstone pattern.

Sandstone is a sedimentary stone that is deposited as mountains are turned into sand grains by erosion. After time, the sand grains are compacted together and bonded together by minerals to form a solid rock.

Interior flagstone is usually sealed with a coating. This will give it shine and protection from water penetration and stains. Coatings are not bulletproof and once a coating is applied it needs to be maintained regularly. If the coating breaks down and starts to peel off, it is llikely that a new coating will be very patchy and uneven.

Stripping is a common treatment for Flagstone that has begun to deteriorate. Stripping flagstone can be very expensive and often, not all of the old coating is removed. If the Flagstone coating is maintained before deterioration is obvious, the stone can be restored and might never need to be stripped. We use only top quality commercial grade topcoat sealers. These sealers are strippable insuring that, if necessary, can be removed in the future.

Our Service: "Clean Right & Recoat"

During this process a specialized cleaning chemical is used. It is designed to prepare the old coating for proper adhesion of the new sealer. It is critical during this cleaning process that all of the dirt and discolorization is removed from the surface before reapplication of sealer. Our truckmounted cleaning system is far superior to traditional mops and buckets. Anything left behind will be trapped under the new coating and only stripping all coating will be able to remove it.

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Exterior Flagstone and Spalling

Exterior flagstone is very susceptible to erosion and spalling. Spalling is when water erodes the bonding molecules that hold the sand particles together and the sandstone starts to peel off in layers (see photo to the right). If the stone is treated with densifer, spalling might never occur. Once spalling occurs — and it will if the sandstone is exposed to the elements — there is permanent damage that could have been avoided or delayed for decades instead of occurring in years.

 

Stone Densifier

After years of development and testing we believe our stone densifier is the most effective product on the market to protect sandstone from erosion and spalling.

The densifeir penetrates deep into the stone, rebonds the sand particles and reinforces the bonding molecules already there. It helps to seal the stone by occupying voids between the sand preventing water from getting in and causing damage.

Our densifier is superior to standard penetrating or enhancing sealers alone. After the densifier has been applied, penetrating sealer is much more effective.

Cleaning & Sealing Process

Our Flagstone cleaning process is very aggressive. We use a medium to heavy custom abrasive process to sand away any loose surface to expose fresh stone. During the sanding process the stone is washed with our truck mounted the cleaning equipment. We inspect the surface for layers that are peeling off and need to be removed before the densifier is applied.

The stone is soaked with as much denisifer as it will absorb Then, a penetrating sealer is applied.