Crawlspace insulation that handles SD humidity.
A vented crawlspace is the cheapest one to lose heat through. Subfloor batts fall out. Vapor seeps up through bare dirt. Rim joists leak air. We tackle all three: vapor barrier on the ground, batt or foam at the subfloor, and air-sealed rim joists with closed-cell foam.
What's included in this service?
- Inspect for moisture, pest activity, and existing damage
- Install 10–20 mil vapor barrier on the dirt floor
- Replace fallen subfloor batts with proper hangers
- Spray foam rim joists for air-seal and R-value
- Insulate exposed plumbing where freeze risk applies
- Install access door gasket and weatherstripping
- Recommend dehumidification or encapsulation when warranted
When do you need this service?
- Floors feel cold in the morning over a crawlspace
- Musty smell rises from floor vents
- Subfloor insulation is sagging, missing, or rodent-fouled
- You see standing moisture or efflorescence on piers
- Pipes have frozen in past inland or East County winters
What do homeowners ask about Crawlspace?
Should I encapsulate or just insulate the floor?
Depends on moisture. If the crawlspace is dry and well-vented, subfloor insulation plus a vapor barrier on the ground is enough. If it stays damp, we move the insulation to the foundation walls and seal the vents — full encapsulation. We run a moisture meter on the first visit.
Are the existing batts worth saving?
Sometimes. If they are dry, intact, and still on hangers, we top up. If they are sagging, wet, or rodent-fouled, we pull them out and start fresh. Either way the rim joist work is what changes the comfort upstairs.
Will this help with cold floors?
Yes. Most homeowners notice a real difference in the first cool morning after install. Cold floors over a crawl come from radiant heat loss to a 55-degree subfloor — bring that subfloor up to 65 and the floors above stop being cold.
Where do we offer Crawlspace in San Diego County?
We provide crawlspace in every city and community in San Diego County. Pick your city for local climate notes and service specifics.
See crawlspace in all 48 cities
Homeowners who hired us for this
We had R-13 batts from 1979 that had settled to nothing. Crew air-sealed top plates first, then blew cellulose to R-49. Upstairs bedrooms feel different now — the AC actually keeps up on hot afternoons.
Got three quotes. Thermal Pro was the only one who recommended air-sealing before insulation and pushed for the radiant barrier given the East County heat. Bill dropped 18 percent in the first August. Worth every dollar.
Our vaulted ceiling was the hottest room in the house. Closed-cell foam at the roof deck completely changed the room. Crew masked everything carefully, came back to check the cure, walked us through the reoccupancy timeline. Professional all the way.
Need crawlspace in San Diego County?
Call for a free quote. Most work scheduled within the week.