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Foundation Insulation Decision Matrix & Regional Spec Sheets

A downloadable, editable decision-tree template (Excel + PDF) that guides homeowners and contractors through climate zone, soil type, water table, and budget inputs to output a specific insulation placement recommendation (perimeter-only, under-slab, or hybrid) with cost estimates and local code references. Includes pre-filled regional variants for all US climate zones and Canadian provinces with frost-line depths, typical contractor pricing, and energy ROI calculations.

TEMPLATE

18 weeks • 70% confidence

Value Proposition

Eliminates guesswork by giving a single, defensible answer tailored to their specific location and soil conditions—no forum debates, no conflicting advice. Contractors can hand it to clients to justify their bid. Homeowners get confidence before spending $2–5K on insulation. Beats fragmented advice because it's a repeatable, updatable artifact they own.

Target Audience

DIY homeowners building or renovating (60%), general contractors and foundation specialists (40%) in cold and mixed climates (zones 4-7)

Key Features

  • Interactive climate-zone lookup with frost-line depth, heating degree days, and typical water-table ranges
  • Soil type selector (clay, sandy, silt) with permeability impact on under-slab feasibility
  • Budget slider that recommends perimeter-only (cheapest) vs. under-slab (most efficient) vs. hybrid based on payback period
  • And more, with full implementation detail...

Tech Stack

Excel or Google Sheets (template authoring) Figma (decision-tree UX design) Sheets to PDF converter or similar (auto-generation) Airtable (state tracking & code update management)
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Original Problem

Homeowners and builders uncertain about optimal slab foundation insulation placement, leading to costly mistakes and energy inefficiency

DIY homeowners and contractors struggle to determine whether slab foundations should be insulated underneath or at the perimeter edges, lacking clear guidance on best practices. This uncertainty results in either inadequate insulation decisions that waste energy and increase heating/cooling costs, or expensive rework after discovering the wrong approach was used. Current solutions fail because technical guidance is fragmented across forums and lacks consensus on regional/climate-specific recommendations.

Score: 17.5%