How to warm up cold floors in house with crawlspace

I installed 2" foam insulation panels between my floor joists. Sealed any gaps with Great Stuff spray foam. Then installed fiberglass batt insulation the depth of the joists. Worked on my back in a three foot crawl space for two weekends.

Could you use Thick Vinyl fooring with a spongy backing?

Hello Valmuse, hope this helps you.

To fix cold floors above a crawl space, you can:

1. Seal and insulate
2. Seal and insulate the crawl space walls and floors. You can use spray foam or rigid foam board panels.
3. Install a vapor barrier
4. Cover the crawl space floor with a vapor barrier to reduce moisture.
5. Air seal vents
6. Block and air seal the foundation vents to keep cold air out. You can temporarily seal vents with foam cut to size.
7. Air seal rim joists
8. Install air-sealed rim joist insulation to slow the transfer of cold air and moisture into the living space.
9. Encapsulate the crawl space
10. Close up the crawl space with a heavy-duty plastic vapor barrier to turn it into a conditioned part of your home.

Sealing and encapsulating the crawl space is a more effective solution than just insulating the subflooring. It can also prevent cold ducts and frozen pipes.

Encapsulating

To encapsulate a crawl space, you can follow these steps:

1. Inspect: Check the crawl space and your home's layout.
2. Repair: Fix any structural issues, like rotten wood.
3. Seal: Seal vents, gaps, and outdoor spaces with vent covers, hydraulic cement, and sealed doors.
4. Remove: Remove the current moisture barrier and level the area.
5. Install: Install a new vapor barrier on the floor and attach it to the walls, piers, and equipment.
6. Insulate: Add foam insulation to the walls to prevent outdoor air from entering.
7. Air seal: Use spray foam to seal any remaining gaps and cracks, including between the crawl space and the floor of your home.
8. Dry: Dry the crawl space.
9. Inspect: Perform regular inspections.