Common Problems with Façade Plaster

This page belongs to the 'plastered masonry' section. Such walls (without insulation) are actually a very useful base for attaching greening technology. However, drilling in façade plaster is sensitive to lateral pressure and water, increased attention is therefore needed in an 'Easy' design or with eyebolts without pressure washers. Also plaster thickness > 2 cm, in the case of insulating and special cleaning, profiles and large grains of sand are problematic. Here you can find an overview of these risks, on the next pages of the section "Cleaning Masonry" there is more info.

Side Pressure

As the photo on the right shows, façade plaster is sensitive to dowels. The problem is especially the side pressure due to more flexible, unsupported eyebolts. The thinner your shaft and the greater their distance from wall, the more suppressed the stem as a cantilever under load on the plug neck and the plaster around the hole. It creates micro-cracks and crater-like eruptions around the hole.

Soddenness

Sealing also plays a role. While water does slowly evaporate after a driving rain has penetrated into a borehole, nevertheless one should minimize the duration of such a soaking. The sum of all soaking-intervals is virtually proportional to flush-mounted wear or plaster wear at the corresponding location. Like streets in winter getting frost heaves which are injurious to the streets, in walls soaking can resulted in micro-tears.

Further problems

Problems can start at plaster thicknesses greater than 2 cm, special plasters are therefore separately discussed. Plasters with very rough structures in turn are sand something in the area of a wall mount and smooth so the seals sit optimally. Under the facade plaster in turn mixed masonry, timber-framed timbers, etc. can cause some problems, read more under ancient masonry.

Appropriate Construction Styles for Facade Plastering

All kits, or mounting brackets are suitable in which a drilled hole is covered with a Belleville washer and seal. This will also hide damage resulting from drilling. It would be encapsulated and hidden. In the Medium designs are "Classic" and "Premium" best because they prefer a deeper and more stable anchorage as with "Eco". The Easy design is only suitable to a limited extent. The plastic dowels with a 'Collar' somewhat already meet plaster walls,  because they lead out to the cantilevered threaded shank of the screw eye better, thereby reducing load-related movements and side pressure, and preventing spalling on facade plaster. But there are in some cases, still the problem of soaking through. Therefore it is inappropriate, at least with representative walls, to use the 'Easy' design with its exposed anchors.

Various plugs in an old façade plaster
Ancient plaster, monastery/saxony
Redeveloped mixed masonry with bricks and sand-lime bricks before plastering
Mixed masonry
Wall trellis with wire, medium construction 'Classic' (covered hole)
Wall trellis with wire rope