We Get This Call Often.
Water in the ducts is bad news
We have a flood pumper and we can suck the water out of the ducts. Then we spray in sanitizer to kill mold, mildew, fungi, yeast and algae germs and bacteria.
Regardless of what type of sub-slab ductwork is present, water is the main concern. If water finds its way into sub-slab ductwork, mold can follow. This leads to poor indoor air quality and health concerns. That stuff at the top of the duct in the picture below sure looks like mold, doesn’t it?
Water in the ducts is bad news
We have a flood pumper and we can suck the water out of the ducts. Then we spray in sanitizer to kill mold, mildew, fungi, yeast and algae germs and bacteria.
Regardless of what type of sub-slab ductwork is present, water is the main concern. If water finds its way into sub-slab ductwork, mold can follow. This leads to poor indoor air quality and health concerns. That stuff at the top of the duct in the picture below sure looks like mold, doesn’t it?
Water in sub-slab ductwork
The biggest concern with all sub-slab ductwork is the potential for water to enter the ducts, which is what today’s blog post is all about.
Side note: sub-slab ductwork is ductwork installed below the concrete floor.
If you’re buying a home with sub-slab ductwork, make sure that your home inspector checks the sub-slab ductwork for any signs of past water intrusion. Signs of water intrusion are a major concern because it’s usually not a simple repair. The image below shows a modern PVC duct with clear signs of chronic water problems.
The biggest concern with all sub-slab ductwork is the potential for water to enter the ducts, which is what today’s blog post is all about.
Side note: sub-slab ductwork is ductwork installed below the concrete floor.
If you’re buying a home with sub-slab ductwork, make sure that your home inspector checks the sub-slab ductwork for any signs of past water intrusion. Signs of water intrusion are a major concern because it’s usually not a simple repair. The image below shows a modern PVC duct with clear signs of chronic water problems.
What to do
There are two basic methods for dealing with water in sub-slab ductwork; abandonment or repair.
If sub-slab ducts are going to be abandoned, they need to be sealed off and new overhead ductwork needs to be installed. This is an expensive option because the new ductwork typically needs to be installed in an already-finished space.
The other option, repair, consists of two steps. First, the source of the water needs to be corrected. This will probably require the services of a basement waterproofing company. Most importantly, the obvious stuff like exterior water management would need to be addressed first. A landscaper is a good source for this.
If that has already been addressed but hasn’t solved the problem, the home might need to have an unusually deep drain tile system installed.
It must be deeper than the sub-slab ductwork. install a pit outside in the corner of the house with a pump in it.
We’ve inspected a handful of homes with such serious ductwork problems that the homeowners have resorted to installing sump pumps inside of their return plenums. or outside at the corner of the house. Have a landscaper dig a hole and install a pit with a sump pump. No joke. We’ve seen this done many times.
Here is a youtube video
https://www.youtube.com/watch?v=8yPhyjpeNz4
https://www.youtube.com/watch?v=_hxZnuGqhxM
https://www.youtube.com/watch?v=pJ8IhO0j-7I
https://www.youtube.com/watch?v=4nfvdCx1zjg
There are two basic methods for dealing with water in sub-slab ductwork; abandonment or repair.
If sub-slab ducts are going to be abandoned, they need to be sealed off and new overhead ductwork needs to be installed. This is an expensive option because the new ductwork typically needs to be installed in an already-finished space.
The other option, repair, consists of two steps. First, the source of the water needs to be corrected. This will probably require the services of a basement waterproofing company. Most importantly, the obvious stuff like exterior water management would need to be addressed first. A landscaper is a good source for this.
If that has already been addressed but hasn’t solved the problem, the home might need to have an unusually deep drain tile system installed.
It must be deeper than the sub-slab ductwork. install a pit outside in the corner of the house with a pump in it.
We’ve inspected a handful of homes with such serious ductwork problems that the homeowners have resorted to installing sump pumps inside of their return plenums. or outside at the corner of the house. Have a landscaper dig a hole and install a pit with a sump pump. No joke. We’ve seen this done many times.
Here is a youtube video
https://www.youtube.com/watch?v=8yPhyjpeNz4
https://www.youtube.com/watch?v=_hxZnuGqhxM
https://www.youtube.com/watch?v=pJ8IhO0j-7I
https://www.youtube.com/watch?v=4nfvdCx1zjg
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