I've just bought an older house that needs replacement foundation vents.
The current vents are metal frame, mortared in place in a block foundation.
Most are damaged, missing screens, adjustment levers, etc. I've seen
various types of replacements. Some are black plastic with a lip and 2
bolts on the inside edge of the sides, meant to be screwed out to clamp the
vent in place from the outside. Others are steel or plastic frame that seem
to be designed identical to the originals and appear to be much more
difficult to install.. requiring chisel and hammer work to remove the
originals and heaven knows what kind of wrangling to get into place and them
mortaring to lock in place.
Does anyone have experience with this job and any recommendations on type
to use or supplier of vents. Thanks!