Norbert V. Krogstad

Norbert Krogstad has investigated distress conditions in several hundred existing buildings, and provided consulting services on numerous cladding systems. He has expertise in the evaluation and resolution of water infiltration, corrosion, cracking, anchorage, and durability problems in exterior wall systems, with a concentration on masonry and curtain wall systems. Mr. Krogstad also specializes in the investigation of moisture and condensation problems. Contact Krogstad via email.

Norbert V. Krogstad's Posts

  • Q: I was looking at the interior of a bell tower of a church recently. The floor of the bell tower is covered with the spalled faces of the brick. What is causing this problem and how can it be corrected?

  • I have seen manufacturers recommend putting a drainage mat in front of rigid insulation in a cavity to prevent mortar bridges. Is this necessary?

  • How can a thermal break be created in parapet?

  • I know that you should put an end dam at the end of flashing that terminates against a door frame. My question relates to a fairly common situation where there is a masonry return adjacent to the door frame (inside corner). In this case, if you put an end dam at the end of the flashing, the water would just flow against the door frame. It would seem that the end dam would need to wrap around to prevent this from occurring. Can you recommend a solution?

  • Many buildings use steel wide flange beams as lintels in larger masonry openings that have a plate welded to the underside to carry the exterior wythe of brick. Since the steel plate is exposed on the outside and on the inside, this would appear to create thermal short. Is this a problem in cold weather?

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