protection of exterior foundation insulation
i am planning on insulating the exterior of the foundation wall with eps. the foundation wall is 4′ high, measured from the top of the footing to the top of the foundation wall. two rows of 4″x8′ by 4″ eps would rest on the footing and come flush to the top of the foundation wall/bottom of the mud sill. i am interested in protecting the foam with some galvanized sheet metal. the sheet metal would start under the mud sill, cover the edges of the foam panels, make a 90 degree bend and cover the face of the outer most foam panel and end below grade somewhere. my question is, will the galvanized metal rust? if so, how quickly? i’m thinking it would be hard to replace this sheet metal sometime down the road. i have heard of this detail before, maybe on here or on GBA but couldn’t figure out how to deal with potential rust..
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I did this on our house using the same sheet metal as roofing. Enamel coating maybe? I also used the technique on an outbuilding that is now over 10 years old. No issues so far.
hi scott, what sector of the universe are your buildings in? where i plan to use it is near jasper, ab, and the soil is almost pure sand. also, nowhere near as much rain as, say, seattle...
Near Whistler, BC. I can post some pics if it would help.