When marble dulls, scratches or joints blacken, many people assume it must be replaced. In most cases it can be restored for far less. Restoration has three levels: crystallisation for the surface, grinding for deep damage, and local repair for chips and cracks, each with different cost and programme.
For surface dulling, light scratches and wear marks. A crystallising agent works with steel wool and a floor machine to form a glossy layer, usually finished within one working day with little dust and immediate use. Priced by area, it is the cheapest of the three.
For deep scratches, heavy etching, unevenness and blackened old grout. Progressive pads physically remove the damaged layer, then polish. It solves what crystallisation cannot, but takes longer, creates more dust and thins the stone. Cost is higher than crystallisation, depending on damage depth and area.
Chips and cracks can be filled, colour-matched and sanded; resin repair on marble is well developed and visible only up close. Severe breakage may need partial replacement. Repairs are usually priced per location, suiting local problems without full restoration.
Rule of thumb: if the stone is structurally sound, restoration always beats replacement, since replacement involves demolition, new material, fabrication, transport and installation. Severe hollow areas or fractures call for partial or full replacement. Home marble floors typically cost only 10 to 30 percent of replacement to restore, recovering 70 to 90 percent of the appearance.
If the stone is structurally sound, restoration is always better value, typically 10 to 30 percent of replacement cost. Severe hollow areas, fractures or loose substrates need replacement.
Crystallisation is usually within one working day with immediate use; grinding takes 1 to 3 days depending on area and damage depth; local repairs can be done same day.
It depends on footfall and care. Homes typically 1 to 2 years; malls and offices with heavy traffic every six to twelve months, or under an annual maintenance contract.