Floor construction type
Primary floor framing or substructure material (e.g., wood joist, concrete slab, steel). Known or imputed for 4.4 million addresses — 3.7% of the addresses Faraday knows.
At a glance
- Coverage today
- 3.7%
- Typical coverage
- 3.8%
- Addresses with a value
- 4.4M
- Share in largest category
- 69.4%
- Most values come
- from the address
- Latest collection
- May 1, 2026
How the categories split
n = 4,373,012Share of addresses in each category. 21 categories, of which the 20 largest are shown, with 69.4% in the largest.
Every category
21 categoriesThe chart above draws the 20 largest. Search here for one it does not.
- Concrete69.41%3,035,091 addresses
- Plywood12.66%553,523 addresses
- Sub-flooring7.37%322,452 addresses
- Steel-flat-slab5.58%243,999 addresses
- Wood1.85%81,021 addresses
- Asbestos1.53%66,881 addresses
- Dirt0.64%28,172 addresses
- Brick0.35%15,260 addresses
- Wood sheathing0.34%14,958 addresses
- Slate0.07%3,180 addresses
- Gravel0.06%2,712 addresses
- Undefined0.05%2,008 addresses
- Concrete/Asphalt0.04%1,816 addresses
- Asphalt0.02%980 addresses
- Metal deck0.02%864 addresses
- Brick/Stone/Slate0.00%42 addresses
- Brick/Stone0.00%30 addresses
- Corrugated deck0.00%14 addresses
- Cinder block0.00%7 addresses
- Metal grating0.00%1 addresses
- Acrylic0.00%1 addresses
Category shares over time
Concrete69.4% (largest)The 5 largest categories, each followed across 12 collections. Estimated from a 1% sample of addresses.
Coverage
Latest collection: 98,683,954 addressesCoverage by state
Percentage of addresses in each state with a value.
Coverage over time
3.7% todayShare of addresses holding a value at each monthly snapshot. A value carries forward for one year.
How we arrive at a value
Whether a value was observed on the person themselves, carried from their address, or estimated from the people around them.
- On the person — 0%
- Not used for this attribute — no value is inherited this way.
- From address — 100%
- Carried from what we know about the household at their address.
- From geography — 0%
- Not used for this attribute — no value is inherited this way.
Coverage, in context
Where 3.7% sits on the catalog’s own coverage range.
Higher coverage than 14% of address-level attributes in the catalog
Freshness
How recently this was collected, and how often a new collection arrives. Each bar is the number of addresses in that collection. Gaps are real — collection is periodic, not continuous.
Change between collections
The share of addresses whose category changed.
of addresses changed value between the two most recent collections — 5878.7× steadier than the catalog median of 13.5%.
Contribution ledger
17 ingestions
1 authority contributed since Jul 2023.
| Observed | Ingested | Count | ID |
|---|---|---|---|
| 2026-05-01 | 2026-07-01 | 125,639,012 | f9d55800… |
| 2026-04-01 | 2026-07-01 | 121,548,788 | 178f88a6… |
| 2026-03-01 | 2026-07-01 | 72,154,489 | a1e715b0… |
| 2026-02-01 | 2026-07-01 | 121,865,620 | b70b01b3… |
| 2026-01-01 | 2026-07-01 | 120,035,058 | 2786571a… |
Technical details
- API name
- floor_construction_type
- Category
- fig/property
- Type · unit
- Text
- Statistical type
- nominal
- Allowed values
- null
- Derivations
- Unspecified
- Directionality
- null
- Deprecation
- false
In a payload
{
"attributes": {
"floor_construction_type": "Concrete"
}
}