TAGS: Sealed-Crawlspace, Garage-Air-Handler, “Ducted” Supply-Air Drying-Mechanism, Curtain-Wall, Insulation Touch-up, Tiger-Teeth, Floor-System-Insulation.
When I move a gallery or post from “client” to “Knowledge-Library” status I am hoping that people can more easily find those images and learn something useful.
This home was unique in 3 ways:
1) Garage Air-Handler with no supply duct-work in the crawlspace.
The air-handler was in the garage. In order to install a Supply-Air Drying-Mechanism (which is one of several acceptable ways to provide a mechanical means of keeping a sealed crawlspace dry), we needed to tap into the supply plenum to avoid all kinds of other nonsense. We installed a take-off, ran a 4″ duct, made a big jog around return duct-work, and penetrated the foundation wall ON THE ENTRANCE SIDE of the big return duct and extended it so you can see it from the entrance. Other contractors would have said it couldn’t be done, or tried to install a dehumidifier (electrical work, drainage, energy waste…) or some kind of fan driven system.
2) Curtain Wall.
The foundation has a series of CMU piers round the perimeter, rather than a continuous CMU block wall. This is sometimes called “Curtain-Wall” construction. As an installer you dont prefer this, especially when it comes down to cleaning up, cutting the plastic, fastening the plastic, and gluing it up against the wall.
3) Insulation Touch-Up
We were able to salvage the dangling fiberglass insulation with about 400 additional wire supports at a huge savings to the owner. It is not uncommon for vented crawlspaces to be re-insulated 2-3 times before they turn 20. The humid 3 seasons can cause the weight of the insulation to quadruple and degrade the “binders” holding the strands together. Given that we have solved the moisture problem we can assume this insulation will last. The way it is now installed, with ~600 wires total is much better than it ever was.