Insulation Project Cost Calculator

Use this for attic, wall or crawlspace insulation with local installed rates.

WattCostLab visual guide showing installation quality and project conditions that can affect renovation cost. — Visual planning guide: installation quality, access and existing conditions can change labor, materials and total project cost.

Transparent by design: every rate is editable. Use local quotes or supplier prices when available.

WCL / INTERACTIVE MODEL

Treatment area (sq ft)Installed rate ($/sq ft)Removal rate ($/sq ft)Area requiring removal (sq ft)Air sealing / prep allowance ($)Access / fixed extras ($)Contingency (%)

Technical design still matters

R-value, material type, air sealing and moisture strategy should be decided separately from price.

Related tools

Use the Building Wall Heat Transfer Calculator to calculate multilayer-wall R-value, U-value and steady-state heat flow, then use the Insulation Savings Calculator for a cost-and-savings scenario.

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Compare scope, exclusions, permits and warranty side by side.

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External video

Watch: practical renovation guide

A short external video can help you understand the installation details behind the cost drivers on this page.

How to Insulate an AtticThis Old HouseWatch on YouTube ↗

Insulation Project Cost Calculator

Technical design still matters

Related tools

Have contractor quotes?

Watch: practical renovation guide

Continue planning with WattCostLab

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