Do masonry bees cause damage? Yes, they do. The holes they create may cause some problems in a structure and allow moisture to penetrate into the material and cause further damage. This is especially true if more than one nesting hole can be seen adjacent to one another in a small area.

Do masonry bees damage houses?

Recognised technical sources confirm that masonry bees do not necessarily cause serious damage to buildings. The bees excavate or enlarge holes, throwing out the spoil behind them. ... The timing of this is fairly important because the female masonry bees commonly re-use their natal nest sites.

Are mason bees destructive?

Mason bees are not destructive insects. They only use holes found in nature or provided by man. Many times mason bees are called “mud bees” because they partition and seal their nesting chambers with mud. ... Mason bees are solitary, gentle, non-aggressive pollinators.