Hi,
I have some crawlspace vents near the base of the house that are 16x9. I am getting sandbags and plastic ready in case, but I read that cutting plywood boards to place up against the brick, and then seal, is a good thing as well. I know I could get some weatherstriping and stick it around the edge of the plywood, then place plastic, then sandbags.
However, after looking at doordam.com, and reading that they recommend putting a bead of DAP around the edge of their product to protect against seepage, I was wondering about doing the same thing around the crawlspace areas.
Is there a sealant that I could place on the plywood in an extra thick bead, and then just press it up against the vent, secure it with a sandbag, that would allow for easy removal later? I'm assuming that the DAP would have to be applied way ahead of time for it to dry, but I might be in a position where I would not have a 12 hr dry time.
I know that there is a sealant for roofs that will provide a 'wet seal' in the rain, but it is like tar and might stain the brick. Or would this be ok?
Also, there is one crawlspace vent near the HVAC that has a power box above it and a thick cable comes from the box and goes through the vent, making the placement of a board difficult. Could I just seal up this vent without any problem? This would leave 6 other open vents, and two of them are fairly near this one with the cable. What would be a good material to seal it up with that I could do myself? It is on the back of the house so cosmetics are not that important.
thanks,
itchy