Hi, I'm cross posting this with same in Old House forums and posting here as basement forum is pretty dry slow.
I'm wondering you might give comment on foundation lintels. Our house was built in 1948, In 1975, two additions were added laterally with crawl spaces enclosed by concrete and brick foundation.
Steel foundation lintels were designed to bridge height difference between original and new addition. The lintels are on the front wall foundation near the ground below concrete and bricks, just as you enter the crawl space opening from the original furnace room.
These steel lintels were used in place of continuous footings, as there was a change in footing elevation. The original concrete basement is sub grade around 8 feet, and the adjacent crawl spaces are sub-grade around 3 feet.
With all the rain we've had in the mid-atlantic area this spring, preceded by the polar vortex multi-freeze days and subsequent thaw, we had an isolated episode of heavy water entry (ground water rise and surface water). Over the last four months, focus of the source of the main water entry has feel upon these steel lintels, as the area beneath the lintel is open. This opening may be for venting of the crawl space as required then by code, and/or by contribution of dirt erosion from water.
I have been in the crawl spaces multiple times to check the brick on cinder foundation walls. Both exteriorly and interiorly there is no evidence of bowing, heaving, horizontal or vertical cracks. The steel lintels are not dislodged, are anchored on both ends of their length, show some rust as expected in a crawl space from moisture. They are roughly 5/8" (H) x 6" (D) x 4' (L).
Does anyone have any thought on how to reduce water entry? By the way, this area of the front foundation had full exterior waterproofing and drainage system away from house done by same company.
Thank you for any insight.
This post was edited by SparklingWater on Mon, Aug 11, 14 at 8:38