Natural Stone

Our approved methods of rehabilitation

• Repair of natural stone by inserting quadratures or by application of restoration mortar
• Strengthening sand and surface layers of minor solidity
• Joint filling of structures with natural stone
• Deep Joint filling in dry spray method for structures of natural stone
• Injection of cracks with filling material such as reaction resin, cement suspension, cement lime or other suitable filling material
• Cleaning of facades made of mineral construction materials

Quality with a reinstatement design from WELS

1. Survey and documentation of damages
2. Testing at the surface:
   • Quantitative Assessment of harmful substances (Chlorides, Nitrates, Sulfates)
   • Assessment of moisture and hygroscopicity moisture absorption at drilled cores:
   • Assessment of the type of natural stone and re-points
   • Assessment of capillary water absorption
   • Assessment of sorption moisture
   • Assessment of pore volume
   • Testing of swellable clay and assessment of the hygric moisture expansion and shrinkage
   • Assessment of conservation by using standard preserving agents
5. Recommending a reinstatement concept of rehabilitation and conservation measures due to preservation orders.