# Insulation Upgrade Calculator — Ireland

> Estimate the effect of an explicitly specified resistance upgrade on a building surface. EUR planning view; stated limitations apply.

Page: https://askcalculators.com/ie/insulation/
Definition: https://askcalculators.com/ie/insulation/definition.json
JSON Schema: https://askcalculators.com/ie/insulation/schema.json
Version: 20.16.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/ie/insulation/?unitSystem=metric&area=80&oldResistance=2&newResistance=6&degreeDays=2500&heatingEfficiency=90&energyRate=0.1&addedDepth=150&unitRate=0&laborCost=0&deliveryCost=0&otherCost=0&costMultiplier=1&spreadPercent=15&taxRate=0

## Inputs
- unitSystem: Measurement system; type=select; optional; default=metric; values=imperial|metric
- area: Surface to insulate; type=number; required; default=80; min=0.01; max=1000000000000
- oldResistance: Existing total assembly resistance; type=number; required; default=2; min=0.01; max=100
- newResistance: Proposed total assembly resistance; type=number; required; default=6; min=0.01; max=100
- degreeDays: Local annual heating degree days; type=number; required; default=2500; min=0; max=20000
- heatingEfficiency: Heating input-to-useful-heat efficiency; type=percent; required; default=90; min=0; max=100
- energyRate: Heating energy price per input kWh; type=money; required; default=0.1; min=0; max=1000000000000
- addedDepth: Added material depth; type=number; required; default=150; min=0; max=2000
- unitRate: Material price per area unit; type=money; required; default=0; min=0; max=1000000000000
- laborCost: Total labor allowance; type=money; required; default=0; min=0; max=1000000000000
- deliveryCost: Delivery allowance; type=money; required; default=0; min=0; max=1000000000000
- otherCost: Other fixed costs; type=money; required; default=0; min=0; max=1000000000000
- costMultiplier: Material/labor multiplier; type=number; required; default=1; min=0.1; max=10
- spreadPercent: Low/high sensitivity around the entered total; type=percent; required; default=15; min=0; max=100
- taxRate: Explicit tax allowance; type=percent; required; default=0; min=0; max=100

## Outputs
- materialVolume: Added insulation volume; format=number
- annualInputSaving: Modeled annual heating input saved, kWh; format=number
- annualSaving: Modeled annual energy saving; format=currency
- payback: Simple payback, years; format=number
- materialCost: Material cost; format=currency
- laborCost: Labor allowance; format=currency
- deliveryCost: Delivery allowance; format=currency
- otherCost: Other specified costs; format=currency
- tax: Entered tax allowance; format=currency
- low: Low cost scenario; format=currency
- mid: Middle cost scenario; format=currency; primary
- high: High cost scenario; format=currency

## Formula
annual useful heat saved = area × (1/R-old − 1/R-new) × heating degree days × 24 ÷ 1,000.

Inputs are converted to canonical units before evaluating this stated formula.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.

Notice: Illustrative defaults are not local quotes or verified legal rules. Dated reference components and user-entered assumptions are explicitly distinguished. Professional review is pending.