Chimney Inspection — Tier 3 in Minneapolis
What Makes a Tier 3 Inspection Different from Every Other Type
Visual
Accessible surfaces examined by eye — no tools, cameras, or removal.
Adds a Camera
A camera scan down the flue assesses the liner and accessible interior — still no demolition.
Opens the Structure
Building components are removed to reach concealed zones a camera cannot access.
Post-Winter Minneapolis Conditions That Trigger a Tier 3 Assessment
What ChimTech Looks for When the Structure Has to Be Opened
Wall Cavity Behind the Firebox
Cracked masonry, displaced liner sections, and breached mortar joints that let combustion gases migrate laterally — only visible once the surrounding structure is removed.
Attic Chase Interior
Where the chimney runs through a finished attic floor: displaced fire stops, fire-compromised framing, and liner offsets that created gaps between tile segments.
Beneath the Hearth Slab
The chimney footing and structural continuity of the base — where, on a multi-flue masonry base, a footing failure affects the entire stack.
Scope Authorization Before Any Deconstruction Begins — Always
What Opens?
Every area to be opened is named in the authorization document before the crew touches anything.
Why Does It Need To Open?
Each opening is tied to the specific concealed zone most likely to hold the damage in question.
What Gets Put Back?
Restoration for each zone is defined up front — wallboard replaced, masonry repointed, finished state restored.
How ChimTech Plans and Documents a Tier 3 Investigation
Review of all prior inspection findings and event documentation.
On-site pre-investigation assessment to identify target zones.
Written scope authorization prepared and reviewed with the homeowner.
Restoration path confirmed for each area to be opened.
Targeted removal of building components per the authorized scope.
Real-time documentation of each concealed zone as access is gained.
Photographs and written notes at every finding location.
No additional areas opened without homeowner notification and approval.
Complete written findings report naming each observed condition by location.
Clear statement of which conditions require repair and which are within tolerance.
Restoration of opened areas to a defined finished state.
Homeowner receives a copy of the full investigation record.
From Authorization to Restoration — the Full Tier 3 Sequence
Diagnostics
Begins before any deconstruction. ChimTech reviews the triggering event — chimney-fire documentation, a prior inspection report, or an account of unexplained CO readings — and a pre-investigation site visit identifies the target zones and produces the scope authorization. The phase ends when you sign the scope and the crew has a clear written mandate.
Implementation
The physical investigation. Components are removed in the sequence the scope specifies; each concealed zone is accessed, examined, and documented. When a finding warrants expanding to an adjacent area, that conversation happens before the scope expands. Pre-1940 Minneapolis homes often have irregular flue geometry and multi-layer walls requiring careful, methodical disassembly — nothing is removed that doesn't need to be.
Post-Investigation Closure
Once all target zones are assessed, opened areas are restored — wallboard replaced, masonry repointed where disturbed, structure returned to a finished state. The written findings report is delivered, and the scope authorization, findings record, and restoration notes are provided as a single project file.
Tier 3 Investigation Coverage Across Minneapolis Properties
Authorize a Tier 3 Investigation with Full Scope Clarity
Tier 3 Inspection Questions from Minneapolis Homeowners
A Tier 3 is triggered when a Level 2 camera inspection identifies damage in a concealed zone that can’t be examined without removing building components, or after a chimney fire where interior structural damage must be confirmed. Unexplained carbon-monoxide readings that can’t be traced to accessible surfaces are a third common trigger.
Depending on where the suspected damage is, ChimTech may need to remove wallboard behind or beside the firebox, open an attic chase section, or access the area beneath the hearth slab. The scope authorization document specifies exactly which components will be opened before any work begins.
Yes. Restoration is a defined part of every Tier 3 scope. Wallboard is replaced, masonry is repointed where disturbed, and each opened area is returned to a finished state. The restoration path for each zone is confirmed in the scope authorization before the investigation begins.
A Tier 2 uses a camera inside the flue to assess the liner and accessible interior without removing any building components. A Tier 3 goes further: physical removal of structure is required to reach concealed zones the camera can’t access. Tier 3 is reserved for situations where Tier 2 findings or a specific event make non-destructive methods insufficient.
Yes. ChimTech provides a complete written findings report identifying each observed condition by location, along with the signed scope authorization and restoration notes. This project file is structured to support insurance claims related to chimney-fire events or CO incidents.
Timeline varies with the number of zones investigated and the construction of the home. Homes built before 1940 often have multi-layer wall assemblies that require more careful disassembly. ChimTech confirms the estimated duration during the pre-investigation site visit, before the scope authorization is signed.