Introduction
Construction reviews often turn on conditions that no longer exist by the time counsel or consultants are fully involved. Repairs start. Materials are covered or removed. The question later is not only what a report says, but what the site looked like at a given time.
This article is about existing conditions, spatial relationships, visible progression, and documentation timing. SterFlies does not determine defect responsibility, design negligence, code compliance, causation, or damages. Those questions belong to qualified professionals.
Why timing matters more than more photographs later
Water intrusion, envelope transitions, flashing, roofs, grading, and interior finishes are commonly altered as soon as corrective work begins. After that, later reviewers are looking at a different environment. Early documentation preserves what was visible and how assemblies related, not a conclusion about why a condition occurred.
That timing problem is the same one described in documenting site conditions before they are altered.
Moisture and interior conditions disappear quickly
The same timing limit shows up indoors, where finishes and damaged materials are often the first things removed.
Interior documentation can preserve where staining, material damage, and sampling or observation locations sat relative to rooms and assemblies. It does not identify mold species, assign a moisture source, or recommend remediation. See documenting mold assessments and the IAQ and mold documentation project.
What disappears is not only the stain. Remediation can remove the material, repaint the surface, and change the room enough that a later photograph of the same wall shows a different assembly. A record made beforehand can show which room, which wall, and which adjacent finish were involved, and where a sample or an observation was marked. That is location context for people who were not present. It does not identify a material, name a source of water, or recommend what should be done next.
Existing-conditions documentation is the dated capture of that setting: the rooms, the visible materials, and the relationships among them at a visit. Reality capture is the coordinated photography or scanning that makes the setting navigable later, rather than a stack of unrelated frames. Both are records of appearance and layout. Qualified professionals still decide what the conditions mean for a construction question.
Thermal patterns are context, not diagnosis
Temperature imagery is sometimes added to that record. It has a narrower meaning than a visible photograph.
Apparent temperature differences can be documented alongside RGB photographs so later reviewers can see location context. They do not, by themselves, establish moisture, air leakage, or envelope failure.
A thermal frame is easier to misuse when it travels alone. Apparent temperature differences can come from material changes, reflections, airflow, residual heat, or moisture, and the image itself does not sort those possibilities. Pairing the frame with a visible photograph, and placing both in the room or on the elevation where they were taken, lets a later reader see the surface and its surroundings. The pair supports review. It does not identify a failure mechanism.
The same limit applies to radiometric files, which store a temperature value for each pixel. Those values are useful to a qualified reviewer who understands the camera, the assumptions used to interpret the image, and the conditions at capture. They are not, by themselves, a finding about the wall. SterFlies can preserve the frame and its location. Interpretation stays with the reviewer.
Exterior and interior records serve different later questions
Aerial mapping can preserve roofs, grading, and envelope transitions. Interior reality capture can preserve room layout and finish conditions. Both are documentation methods described under forensic mapping and site documentation. Measurement usefulness depends on the capture plan. Neither method is a survey, and neither assigns responsibility.
Exterior and interior products answer different location questions. An orthomosaic, a plan-view photo map from overlapping aerial images, can show roof geometry, drainage paths, and how the building sits on the grade at the time of flight. Photogrammetry is the method that builds that map, and sometimes a point cloud or mesh, from the overlapping photographs. Interior reality capture can show room layout, openings, and finish conditions that the aerial view cannot see. Using both gives a path from the site to the room. It does not assign a condition to a trade, a design, or a specification.
Measurement questions should stay tied to the capture. A reviewer who needs a dimension should know whether the record was built for visualization, for relative comparison, or with the control the question requires. This article does not treat any of these products as a property survey. It treats them as dated visual and spatial records that a qualified reviewer can inspect after the site has changed.
For the broader method, see what forensic site documentation is. For later expert use of spatial records, see why expert witnesses need more than photographs.
Conclusion
Construction reviews that start after repairs are looking at a later site. Dated exterior maps, interior captures, and thermal frames paired with visible photographs can preserve what was visible, and where it sat, during an earlier visit.
Those records are existing-conditions documentation. They hold layout, adjacency, and appearance. They do not determine whether a condition is a defect, whether a design or a construction step was adequate, or what a repair should have been.
SterFlies captures and organizes the site record. Counsel and qualified technical reviewers use it, if they use it, for their own questions. The documentation does not answer those questions for them.