Ask building, residential, plumbing, mechanical, fuel gas, fire, and energy questions with source-matched retrieval, citations, and agent-assisted synthesis.
Can I attach a residential deck ledger to brick veneer?
IRC R507.9.1.1 directly prohibits deck ledgers supported on stone or masonry veneer. Use a freestanding deck or engineered connection.
The interface keeps search, source retrieval, table extraction, and synthesis in one compact workbench so users can inspect the answer trail quickly.
Plain-language questions resolve to source-matched evidence inside a chat-only research flow.
The response path keeps the cheap search pass separate from deeper tool-backed synthesis so answers can cite the material that mattered.
Related requirements surface as retrieved references instead of disappearing into a generic assistant response.
Pipe support, egress, construction, and equipment tables render as searchable rows rather than screenshots.
Free keeps the lookup surface available. Pro is for inspectors, builders, and code researchers who need frequent agent-backed answers and saved threads.