Thick exterior plasters (special plasters)

Common exterior plasters up to about 2 cm thick are almost always uncomplciated and well suited for mounting trellises. But thicker plasters, often in combination with reduced density and hardness of the plaster, have special needs. Here we'll discuss which of our trellis systems are compatible in these cases. 

Standard: external plaster up to 2cm thick

Exterior plasters may consist of one or more layers, the total thickness generally not exceeding 2 cm. Such plaster layers are almost always uncomplicated and lend themselves well as load-bearing sufaces for trellises. This is also true for more contemporary light and porous plasters. If you do not know the thickness of your plaster, check the construction documents or test-drill in 2-3 places.

Notes for thicker layers of plaster

We are not referring here to thick plaster in a classical sense, (which is usually about 2 cm thick) but to significantly thicker coats. Such very thick plaster layers appear most often on historic buildings where it was/is used to even out unevenness in the masonry, recesses, or hollow areas. In such cases, FassadenGrün trellis applications are very limited. Massive, Easy and the Medium-Eco kits should be avoided, since they do not provide sufficiently deep and stable anchorage with respect to the bending-buckling loads; the plaster will not be able to absorb the bending load and then the anchors may loosen and the plaster damaged.

 

With plasters 3cm and thicker, our Light kit is also no longer suitable. With 4cm and thicker, the Medium-Premium is not longer an option, and with 5cm, even the Medium-Classic is not able to offer the holding strength needed. Please consider these as general recommendations which depend, of course, on your unique situation (degree of cable tension, desired climbing plants, etc..). 

 

After an on-site inspection, our Heavy style can be used with few to no restrictions. Likewise, the Medium Classic can almost always be used if the mounts are bonded in the 16mm hole with a seive sleeve SD 16085 and composite mortar rather than with a long rawl plug. Alternatively, the long plugs can be glued in place; then the mounts can be unscrewed later. Also all the anchors for wood trellises are usually suitable, because here there doesn't arise such bending loads as with cables. *Also, all fittings (mounts) are generally compatible with wooden espaliers, as bending loads are much less than with cable systems.

Other special plasters

To improve the insulation of a wall, 'thermal insulation plasters' are sometimes used. They contain small polystyrene (styrofoam) beads and have a lower compressive strength than regular plaster. Nevertheless, the above applies to them. Even strongly profiled or moulded textured plasters, e.g. on landmarked/historic buildings also have less resistance to pressure. Use our medium classic system with composite mortar bonding (as described above).