ADVICE AND LAYING INSTRUCTIONS FOR STONE FACINGS
CHECK THE BACKING SUPPORTS:
- The supports on which the stone facing is to be glued must be solid, dry, clean, free of dust, oil or fat, old paint and any other substance that could affect its adherence.
- If in doubt, attach the metal grid ZINCORETE 2,5 to the wall using the expansion fixings and smooth a thin layer of special B&B glue.
- Do not use the glue if the temperature is near zero or if the forecast is for frost on the days immediately after the gluing.
- Do not use the product on a wet backing support or if rain is forecast.
B&B SPECIAL GLUE:
- We advise you to always use the B&B special glue.
- The glue must ALWAYS be spread twice, both on the wall and on the back of the piece that is to be glued.
- Spread the glue on the wall with a suitable notched trowel both horizontally and vertically.
- Continue on small areas of the wall in order to prevent the glue from drying out and becoming a “film”.
- Spread the glue on the back of the stone and make it adhere to the wall using a proper pressure.
- It is possible to apply the B&B stone facings also on special backing support such as wood, metal, insulating materials, plasterboard, ventilated walls, etc. We suggest you to contact the B&B technical office to develop these kinds of projects.
- All the stones placed with the “random mix” pattern can be laid dry or with joints. During the packaging, we always consider a 20 mm joint. Therefore, in case of dry laying, about the 15% more of material is needed.
We advise the use of DRYSYSTEM:
- to guarantee maximum transpiration of the wall and allow the drainage of any possible condensation;
- to guarantee maximum holding in case of wall facings contiguous to earth that are not waterproofed;
- to solve the problem of rising humidity.
COVERING AGAINST WATER INFILTRATIONS:
- It is necessary to prevent rainwater infiltrations between the facing and the supporting wall. Therefore you should always provide for a covering with a roof, flashings, metal sheet brims or slabs.