palmettoinspect Posted May 24, 2016 Report Share Posted May 24, 2016 I often run into steel lintels under with CMU foundation walls under decks. After a few years the steel is obviously deteriorated. Is there a proper detail for this? Is it as simple as isolating the steel from the CMUs with some type of membrane flashing or just a bad idea altogether? Click to Enlarge 39.41 KB Quote Link to comment Share on other sites More sharing options...
kurt Posted May 24, 2016 Report Share Posted May 24, 2016 Two coats corrosion resistant primer, two coats corrosion resistant paint, then flashing membrane as a capillary/isolation break. No one does the paint. The membrane will work reasonably well by itself if it's detailed with end dams and back dams. Quote Link to comment Share on other sites More sharing options...
palmettoinspect Posted May 24, 2016 Author Report Share Posted May 24, 2016 Thanks Kurt! Quote Link to comment Share on other sites More sharing options...
palmettoinspect Posted May 24, 2016 Author Report Share Posted May 24, 2016 Thanks Kurt! Often the repair is a coat of paint from the underside which I doubt does much. I also wonder what if any affect PT wood in contact with the steel has on the corrosion? A lot of times PT pine louvers are butted to these rusted and deteriorating lintels. Click to Enlarge 50.23 KB Quote Link to comment Share on other sites More sharing options...
kurt Posted May 25, 2016 Report Share Posted May 25, 2016 PT wood eats up hardware. I suppose it does the same to steel lintels. Quote Link to comment Share on other sites More sharing options...
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