Because bluestone and the surrounding mortar joints lay flat, eventually water sits on it and creates hairline cracks in the mortar joints. Water then gets into these cracks- freezes and expands- and starts breaking the mortar joints apart. From there- water gets under the stone- freezes and expands-and starts damaging the stone. The other major cause of deterioration is shifting.
If you have bluestone on your property- many times it can be preserved by grinding out the mortar joints surrounding the stone and tuck pointing using type S mortar mixed with powdered dye and aggregate stone for proper aesthetics. This will create a water tight seal that will protect the bluestone from the necessity of costly replacement while restoring it’s aesthetic qualities.
When creating a new bluestone porch, patio or walkway- Madison Maintenance LLC will first pour concrete for it’s foundation. Then the bluestone pieces will be installed in a mortar base on top of the concrete foundation. This will drastically reduce maintenance issues that arise from the shifting which cracks mortar joints and stone.