R-value and U-factor of a wall or roof assembly from layers and thickness, with
R-value and U-factor of a wall or roof assembly from layers and thickness, with a framing-fraction correction and heat flow.
Answers HTTP 429 without x402 payment termsour last check, 2026-10-21
0 of 1checks answered this week
n/amedian answer time
$0.02listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://home-energy-calc.x402tookit.com/insulation-r-value
| Category | Everything else |
|---|---|
| Provider host | home-energy-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | no x402 terms | 429 | 735 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"areaSqFt": 1000,
"cavity": "fiberglass batt:3.5",
"deltaTF": 40,
"framingFractionPercent": 25,
"includeAirFilms": true,
"layers": "drywall:0.5; sheathing:0.6r; siding:0.6r"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"areaSqFt": {
"description": "Surface area in square feet, to get heat flow",
"type": "number"
},
"cavity": {
"description": "Insulated cavity layer as material:inches or name:Rr (for example 'fiberglass batt:3.5'); with framing it is combined in parallel",
"type": "string"
},
"deltaTF": {
"description": "Temperature difference in F, with areaSqFt",
"type": "number"
},
"framingDepthInches": {
"description": "Depth of the framing member in inches (default 3.5 for a 2x4); used with cavity",
"type": "number"
},
"framingFractionPercent": {
"description": "Share of the wall area that is framing, 5 to 40 (default 25, typical for 16-inch spacing)",
"type": "number"
},
"includeAirFilms": {
"description": "true to add the interior and exterior air-film resistances (R-0.68 and R-0.17), default false",
"type": "boolean"
},
"layers": {
"description": "Lines material:inches or name:Rr separated by semicolons, for example 'drywall:0.5; cavity insulation:3.5r; sheathing:0.6r'. Materials: fiberglass batt, cellulose loose-fill, open-cell spray foam, closed-cell spray foam, eps board, xps board, polyiso board, softwood framing, drywall, plywood",
"type": "string"
}
},
"required": [
"layers"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"airFilmsIncluded": {
"type": [
"boolean",
"null"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"framing": {
"properties": {
"cavityR": {
"type": [
"null",
"number"
]
},
"effectiveCavityLayerR": {
"type": [
"null",
"number"
]
},
"framingFraction": {
"type": [
"null",
"number"
]
},
"framingR": {
"type": [
"null",
"number"
]
},
"lostToFramingPercent": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"heatFlowBtuPerHour": {
"type": [
"null",
"number"
]
},
"heatFlowWatts": {
"type": [
"null",
"number"
]
},
"layers": {
"items": {
"properties": {
"layer": {
"type": [
"null",
"string"
]
},
"r": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"thicknessInches": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"nominalRIfNoFraming": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"totalR": {
"type": [
"null",
"number"
]
},
"uValue": {
"type": [
"null",
"number"
]
},
"verdict": {