Sand wooden beams for visual reasons


In the majority of cases there is a sanding of wooden beams for optical reasons. Hidden roof or ceiling beams do not need sanding and protective coatings can be applied directly. With exposed beams on ceilings, and support beams, surface treatment is prepared by abrading.

In old buildings mostly hardwood trees

In old buildings, which originated before the 1940s, it can usually be assumed that the use of hardwood beams for the wooden beams. Accordingly, the dense surfaces are stable. When fiberizing or splintering occurs, this usually only affects one upper sapwood layer.

When sanding this split layer can be removed relatively easily. When the actual heartwood is reached, the abrasion rate slows down quickly and can go back to almost unnoticeable. It must be decided on a case-by-case basis that a lengthy grinding work is worthwhile for the "leveling" of the beam surfaces, or that a naturally uneven "fouling" can persist.

Tiefenoimprägnierungen and alternatives

If sanding is to cause a visual change in the wooden beam surfaces, it must be checked how deep pre-treatments penetrated the wood. Above all, old construction beams can be provided with impregnating substances that do not allow sanding down to "bare" wood. In this case, only an opaque painting or varnishing is possible.

As alternatives to sanding come sandblasting or planing in particular for wooden beams in the outdoor area in question. Depending on the condition of the wooden beams, brushing may be enough to remove loose surface fibers and splinters. In general, any intervention on the wooden beam is ideally kept to a minimum.

Sanding is not always allowed

Old wooden beams are often part of the historical fabric of a building. If there are any restrictions regarding structural alterations such as monument protection or maintenance regulations, this also applies in many cases to sanding on wood. Before grinding, in case of doubt, the written permission of the owner and, if necessary, the competent building authority should always be obtained.

Tips & Tricks

When grinding, pay attention to trapped branches in the bar. They are often much harder than the environment and "wear out" your abrasives unnecessarily. Grind the spots separately if you notice a resistance difference in the cut.


Video Board: Paintshaver 1