Commercial Roof Inspection in Houston

A residential roof sheds water. A commercial low-slope roof manages it, and that distinction drives everything the inspection looks at.

Seams and laps. On single-ply systems the field membrane is rarely the problem. The seams between sheets are, and so are the details where the membrane is welded or adhered around anything that penetrates it.

Terminations and flashings. Where the membrane meets a parapet, a curb, an expansion joint, or a wall. Base flashing pulling away at a parapet is one of the most common findings on any Houston low-slope roof.

Penetrations. HVAC curbs, exhaust fans, vent stacks, conduit, gas lines, satellite mounts. Every one is a hole in the roof that something is supposed to be sealing, and every one is a place a maintenance contractor may have stepped, drilled, or improvised.

Drains, scuppers, and ponding. Blocked drains are among the most preventable commercial roof problems in this city. Standing water adds structural load, accelerates membrane degradation, and hides the defect underneath it. Water still sitting on a roof more than a couple of days after rain is a finding in its own right.

Surface and substrate condition. Blistering, splitting, shrinkage at corners on older single-ply, alligatoring on built-up, granule loss on cap sheets, and soft spots underfoot that indicate saturated insulation below the membrane.

If hail or wind is the trigger for the visit, the storm damage roof inspection page explains the separate documentation and insurance boundary.

On a house the deliverable is usually an answer. On a commercial building it is a record.

A useful commercial inspection produces a written condition summary, photographs keyed to locations on the roof, findings separated into immediate leaks, active deterioration, and deferred maintenance, and an indication of remaining service life. That is what a capital request, a board packet, an insurance file, or a due-diligence review can actually be built on.

Two things are worth confirming before the visit rather than after. First, whether a formal written report is included or is a separate paid deliverable — it is frequently the latter, and assuming otherwise costs you a second appointment. Second, whether your manufacturer warranty requires documented periodic inspection to stay in force. Requirements vary by warranty, and a lapse in the maintenance record can complicate a later warranty request. Check the actual document. The inspection-frequency guide explains the commercial timing question separately from Houston's residential rhythm.

Infrared or moisture survey. A meaningful step up in cost, because it is a different method with different equipment, often performed after sundown when the thermal differential is readable. It maps possible wet areas below the membrane without cutting the roof open, which is what makes it useful when the question is how much of the roof may be wet — a question a visual survey cannot answer by itself.

Core sampling. Physically cutting and patching small test areas to confirm the assembly and the number of existing layers. It is normally scoped as part of a replacement assessment or due-diligence review rather than a routine inspection.

These are specialist paid scopes. Confirm that the roofing professional offers the method, what the deliverable includes, and the price before the visit. The drone roof inspection guide explains where aerial and infrared tools genuinely help and where an in-person inspection still has to take over.

Three things move a commercial number more than anything else. Square footage, because the survey is a systematic walk rather than a look. Access, because a roof reached by hatch is a different job from one requiring a lift or fall-protection rigging. And documentation depth, because a photograph keyed to a roof plan with a written finding against it takes time that a verbal summary does not.

Get the scope agreed in writing before the visit. The most common way this goes wrong is a manager who assumes the report is included, discovers it is not, and pays for a second mobilization to get the document the lender asked for.

Have the building type and approximate square footage, roof system if you know it, roof age, active-leak details, roof-access arrangements, and whether you need a formal written report. Those details let the local professional confirm the scope before attending instead of discovering at the hatch that the equipment or deliverable is wrong for the job.

Tell us your municipality and ZIP as well. The service areas page covers the normal Houston-area route, but the roofing professional confirms availability for the specific building.