Renewal of mouldings and decorations

Renewal of run mouldings

Run mouldings are one of the most frequently encountered characteristic features of older buildings. These long-stretched elements played a functional role, but also formed a decorative element on the façade. You find them at the eave, in the middle of the façade, as well as around windows and openings.

Why is this happening ?

Originally, run mouldings could consist of mortars alone, with a core of brick or natural stone. Rain, snow and pollution are the main cause of damage to these elements. But also unfavourable solutions not suited for new use or changed microclimatic conditions (traffic, heat transport, windows, etc.) can induce and cause damage. As with all horizontal surfaces, water and dust will accumulate and give good conditions for organic growth and water penetration. In particular, frost will crack open and start the decay of mortars. Wrong repairs (too much cement) can induce new damage as well.

Handcraft and correct rebuild


As a general rule of thumb, all damaged parts of a run mould should be removed. Very often parts of the moulding can be kept, and these parts should be used as a reference for the rebuild, using customised templates to form the sought patterns. A combination of the right technique when removing and the right products and technique while rebuilding is essential to obtain a result that will endure for a long time. It is important to use several layers while building the structure and form. In some cases, a finishing layer of paint is not enough to protect the horizontal surface (at low angles). In such cases, using metallic fittings to protect horizontal surfaces is necessary, even though this wasn't a part of the original façade. Window sills and long, wide mouldings should always be considered. Of course, metallic fittings on a run moulding may interfere with the aesthetic impression of the building