Record what the plinth supports and what it penetrates
A roof support plinth can carry equipment, surround a penetration or perform both roles. Those functions should be recorded separately. A concrete block cast above the roof surface may look substantial while leaving unanswered questions about its attachment, the load path below and the waterproofing around its perimeter.
The handover problem is practical: a future contractor needs to know what can be altered without damaging the roof or disturbing the equipment. A photograph of the finished plinth rarely provides enough information. It may conceal anchors, membrane turns, insulation and the route taken by pipes or cables.
For a Cyprus building manager, the useful record is a compact account of the installed condition, supported by drawings and dated evidence. Our Polis roof investigation guide explains why equipment and roof details belong in the wider inspection. Here the focus is the information needed to maintain and eventually modify one support safely.
Give each support an identity and a location
Start with a roof plan showing each plinth or support point under a unique identifier. Use that identifier on photographs, inspection entries and drawings. Descriptions such as rear unit or large plinth become unreliable when equipment is replaced or another contractor views the roof from a different access point.
The entry should state the supported item, approximate footprint and adjoining features, particularly outlets, movement joints and access routes. Record whether the support penetrates the waterproofing, sits above it or connects through a proprietary integrated fixing. Do not infer concealed construction from the visible shape; mark unverified information as unverified.
Dates need a purpose. Separate the survey date, installation date, inspection date and document revision date. A drawing issued before opening the roof may show an intended construction that differs from what was found. The final record should identify the installed revision and retain the reason for any significant change.
Keep load evidence distinct from weatherproofing evidence
The person accepting the support arrangement needs evidence about how equipment loads reach suitable construction. The person accepting the waterproofing needs evidence about membrane continuity and compatible detailing. One acceptance should not silently stand in for the other. A successful leak check does not establish anchor capacity, and a strong anchor does not establish a watertight penetration.
The record should identify who supplied the equipment loads and who accepted the supporting arrangement. Include the relevant drawing or calculation reference rather than attempting to reproduce an engineering design in a maintenance note. If wind restraint, vibration or future maintenance loads affect the arrangement, the responsible specialist should address them in the design information.
Roof-Pro's non-penetrative support literature illustrates an alternative that distributes support through designed bases without penetrating the membrane. That does not make an improvised loose block equivalent to a designed support system. Nor does avoiding penetrations remove the need to consider the roof assembly's ability to carry the support. Roof-Pro systems overview.
Describe the waterproofing connection by its layers
For a conventional raised plinth, the record should show the membrane route around its sides and the termination or covering at its top. Where services pass through, distinguish their individual seals from the flashing around the plinth itself. Water can enter at either location, so a single note saying plinth sealed is insufficient.
Record the membrane type, detailing material, preparation method and product references. Where the existing roof could not be identified, preserve the evidence used to accept the repair connection, including any manufacturer response or trial assessment. Similar colour or appearance is not a reliable compatibility specification.
Roof-Pro's ProTrak integrated fixing brochure describes a factory-assembled support interface supplied with a membrane suited to the roof system. It illustrates why the interface material is part of the support selection, rather than an afterthought applied around installed bolts. The brochure does not establish compatibility with a particular unidentified roof. ProTrak integrated fixing point brochure.
Capture the evidence before equipment conceals it
The record should follow the moments when information will disappear. Photograph the exposed substrate before the base is installed, the attachment before it is covered and the waterproofing before equipment restricts access. Include an overview that makes each close view locatable. A scale or annotated measurement helps where dimensions matter.
Inspection entries should name the observer, date, inspected stage and acceptance basis. If work was inspected only after completion, state that limitation. Finished photographs cannot retrospectively verify concealed anchor installation or the condition of a covered substrate. Avoid a generic inspected stamp that implies more than the evidence shows.
Testing needs the same discipline. Record the question, method, conditions, result and limits. A controlled local water check may assess an exposed connection after the materials are ready, but it may not examine service penetrations hidden beneath equipment. Any untested interface should remain visible in the record, together with the proposed next action.
A hypothetical handover entry that supports later decisions
Imagine a condenser supported above a refurbished roof on two raised plinths. The handover identifies them as P-01 and P-02 on roof plan revision C. It records the equipment reference, installation date, waterproofing detail revision and separate references for the support design and equipment installation. These identifiers connect the documents without pretending that one trade approved everything.
The photographs show the prepared plinth sides, membrane connections and completed top weathering before the condenser is positioned. A later inspection entry records that the accessible flashing was visually checked, while a local water check covered only the agreed exposed perimeter. It explicitly excludes concealed service connections behind the unit.
Suppose the upper service seal cannot be inspected until a bracket is temporarily removed. The unresolved entry names that location, the required access arrangement and the party responsible for arranging it. The manager can then commission a defined follow-up. Without that entry, a polished completion photograph could conceal an important remaining question.
Hand over maintenance access and change restrictions
A support detail is maintainable only if someone can reach the waterproofing, inspect nearby drainage and replace equipment without guessing how it is attached. The handover should show removable components and identify any isolation or lifting arrangements that require a specialist. Do not assume the roofer can move operational equipment during a future leak visit.
Record restrictions on later drilling, additional loads, new service routes and changes to adjacent finishes. These restrictions should refer to the accepted design rather than broad warnings. If the support is intended for a particular unit, a heavier replacement needs review even when its feet fit the same positions.
Keep the record with the building documents and update it after alterations. Request a waterproofing detail assessment where the existing plinth construction or membrane connection is uncertain. Provide equipment information and existing drawings as well as photographs. The resulting record should distinguish verified work, accepted design references and remaining investigation so that the next decision begins with usable evidence.
Frequently asked questions
Does a concrete roof plinth prove the equipment is adequately supported?
No. The load path, attachment and underlying construction require appropriate design evidence. Visible size and a satisfactory waterproofing inspection do not establish support capacity.
Are non-penetrating equipment supports always preferable?
They can avoid particular penetration details, but suitability depends on loads, stability, roof construction and the selected system. A designed non-penetrative support is different from equipment placed on loose blocks.
Which photographs are most useful at handover?
Images taken before concealment: prepared substrate, attachments, membrane connections and top weathering. Link each close view to a support identifier and an overall roof location.
How should an inaccessible seal appear in the record?
Name the exact interface, explain why it was inaccessible, state what was not verified and identify the access or specialist work needed for follow-up.
Sources
Sources checked 2026-10-15.