The attachment of holders in calcareous sandstone as a form of 'exposed masonry' is almost without restrictions, the only problem with this material is that the stones have cavities, which can be a frustrating surprise when drilling. See below for more information.
Calcium Silicate are almost always industrially produced bricks made up of lime, sand and water. They are light in colour (a spectrum from dark beige to white) and generally have small recesses within the bricks and must therefore be drilled with the appropriate care.
All 5 of our construction designs, with their standard mounts are fully compatible with sandstone and they can be applied directly into the both hollow and solid bricks or into the surrounding mortar joints. If using our heavy kits, we advise you add the use of a composite mesh sleeve as this will help to secure your anchor should you encounter a recess in the spot you are drilling.
When greening an external wall, you must be aware of the sensitive border areas, here any anchor or screw should be secured with a composite mortar. Please inquire if there are any questions.