By giving designers and owners more confidence in masonry construction, masonry testing increases industry sales. The continued development of national masonry standards and refined engineered design procedures has sparked an explosion in the number of structural tests specified. Unfortunately, while taking on more masonry work, commercial construction laboratories often fail to understand and properly execute ASTM procedures for testing masonry. Jerry Painter, president of Gainsville, Fla.-based Painter Masonry, recalls an incident where a Florida lab claimed the type M mortar his firm was using on a project had a laboratory design strength of under 1000 psi, when it should have had a design strength of more than 2500 psi. Painter knew the results were false. Examining a finished wall, he could tell the mortar was satisfactory; he could barely scratch the mortar joints with a nail. Fortunately, Painter's superintendent observed one of the lab's technicians taking a field sample of mortar. Painter drove over to the lab and was able to discredit the results and continue construction. The owners of construction laboratories and technicians need more masonry training and should get involved in masonry associations and on ASTM committees C12 (Mortars for Unit Masonry) and C15 (Manufactured Masonry Units). The Masonry Society will develop programs to certify both lab technicians and laboratories. However, developing and implementing these programs will take some time.