I've a job on a house where the brickwork is dropping above an aluminium door (with a window at each side) in a cavity wall. I assume there is a concrete lintel inside, but the door, which seems to have replaced a similar timber version on the outer skin, has no lintel above, just a plastic cover-strip glued on!! The opening is nine bricks long. The three courses above the door are coming down, above is currently OK by the look.
What sort of lintel can I put in to keep the bricks in place? There's no great load, and I don't want the lintel to be externally visible. A piece of galvanised angle-iron would do, but is there a "proper" lintel available for this> I'm going to knock out three or four courses above the doorway, using a strongboy or just an acro to hold up the courses above, put in the lintel, and brick up.
Any ideas?
J.