Start with the opening drawing note of the issued Section 09 22 36: confirm that the drawings show where plaster goes and which plaster it is, the type and spacing of the studs, furring, or ceiling channels behind it, every control joint, the fire and sound ratings, and each access panel, with a hanger detail wherever a plastered ceiling is suspended. Then check that the lath type and weight kept suit the support spacing drawn, that paper backing and galvanized or stainless base metal follow the room exposure, that gypsum lath appears only on dry, flat interior surfaces, and that the joints, beads, hangers, and rated assemblies match the Gypsum Plastering section and the details.
Assemble the review package
Gather the floor plans and the room finish schedule with every plastered surface and its plaster type, the partition and furring types with stud or furring depth, spacing, and the base each receives, the reflected ceiling plans with plastered ceilings, soffits, bulkheads, and access panels, the ceiling sections with carrying and furring channel spacing and the hanger detail, the interior elevations with control joints, casing beads, corner beads, and base conditions, the wet rooms such as natatoriums, showers, laundries, and large kitchens, the life safety plan and partition types with their UL design or GA file numbers and STC ratings, the mechanical, plumbing, and electrical plans for items that need access, the structural notes on deck and slab attachment, the design analysis with the climate zone and environmental severity classification (ESC) under UFC 1-200-01, and the issued Section 09 22 36 with Sections 09 22 00, 05 40 00, 09 23 00, 09 24 23, and 08 31 00. Follow one plastered wall and one plastered ceiling from support to finish before assuming the others match.
WBDG publishes UFGS 09 22 36: Lath as a public guide-specification reference (accessed November 11, 2026). Use your project’s issued specification and amendments for the actual comparison; the guide specification does not automatically govern your project. The checklist below is an original suggested review workflow, not a reproduction of the UFGS requirements.
Eight checks to run against the issued set
Use one record per location or system. The CSV contains the same eight prompts plus fields for source revisions, observed evidence, the review owner, the decision, and closure references.
| Check | Sources to compare | Question to resolve |
|---|---|---|
| What the drawings must show | Opening drawing note (extent of plastering, type and spacing of supports, plaster type, control joints, fire and sound ratings, access panel locations and sizes with fabrication details for large panels) + Hangers note (detail of splayed and countersplayed hanger wires) + Fire-Resistant Assemblies note (UL design or GA file numbers on the drawings) + Access Panels note (exact number and location) + finish schedule, partition types, and reflected ceiling plans | Can every plastered surface be traced to a partition, furring, or ceiling type that gives the plaster type and the support type and spacing behind it, are the control joints drawn rather than left to the article, does every rated or sound-rated plastered assembly carry its design number and STC rating, is there a hanger wire detail for each suspended plastered ceiling, and are access panels located and sized, with large panels detailed, as the notes say they will be? |
| Metal lath type and weight against the supports drawn | Metal Plastering Base article (type and weight for the support type and spacing shown; galvanized unless indicated otherwise; no rib lath under a ceramic tile scratch coat) + its note (lath tables of ASTM C1063 and ASTM C841) + For Portland Cement-Based Plaster and For Gypsum Plaster brackets (lath type and a weight blank) + Metal Plastering Base installation bracket + partition, furring, and ceiling framing types + Section 09 22 00 | Has the specifier chosen a lath type and filled in the weight for each support spacing actually drawn, is rib lath kept off walls that receive a tile scratch coat, are ceilings, where support spacing is usually wider, given the lath the tables call for rather than the wall lath, and where the project has exterior stucco, is the stucco lath left to Section 09 24 23 so the two sections do not specify the same lath differently? |
| Paper backing and base metal by room exposure | Paper Backing article and note (moderate water-vapor resistant where moisture protection is needed, water-vapor permeable for hollow partitions and sprayed plaster; rooms left blank) + Plastering Base article and note (galvanized or stainless steel for exterior work and for natatoriums, showers, and laundries; stainless where water flows over the surface) + Metal Plaster Base with Paper Backing installation (laps; water shed to the exterior) + room finish schedule and wall sections | Are the room blanks in the paper backing and plastering base paragraphs filled with the rooms the finish schedule actually shows as wet or humid, is the vapor-resistant or permeable backing consistent with the wall’s vapor design and the insulation drawn, do the wall sections show the backing lapped to shed water outward where lath is used on an exterior or wet wall, and is stainless steel kept at the ledges, returns, and soffit drips the note mentions? |
| Where gypsum lath may go and what it must meet | Gypsum Lath note (interior gypsum plaster only, on relatively large flat areas; not on curved or high-moisture surfaces) + Gypsum Lath article (plain, Type X, or foil-backed in bracketed thicknesses; cites ASTM C1063, C1764, C1787, and C1788) + References article (those four titled for portland cement plaster and non-metallic lath under it) + Gypsum Lath installation + Delivery and Storage bracket + partition types and rated designs | Is gypsum lath drawn only on dry, flat interior surfaces, with metal lath at curves, soffits, and wet rooms, is Type X used where the rated design calls for it and foil backing where the wall needs a vapor retarder, and since the article cites only standards written for portland cement plaster and its bases and the References article lists no gypsum lath product standard, has the specifier named the standard the gypsum lath must meet? |
| Control joints, unrestrained ceilings, and beads | Control (Expansion and Contraction) Joints items (panel limits for cement plaster, for unrestrained gypsum plaster ceilings, and for gypsum plaster without perimeter relief; joints at structural expansion joints and changes in framing direction) + Unrestrained Ceilings (isolation at walls, beams, and columns; no corner reinforcement at the internal angle) + Plastering Beads bracket (casing beads at unplastered edges, structural intersections, bases, dissimilar materials, and different plasters; corner beads at external corners) + Section 09 23 00 Control and Expansion Joints (a different area limit) + elevations and reflected ceiling plans | Do the elevations and ceiling plans show joints at the spacing the article sets for the plaster on each surface, at every building expansion joint and change in framing direction, is each large or cement plaster ceiling detailed as unrestrained with a casing bead or joint at the walls, columns, and beams instead of corner reinforcement, and since this section and Section 09 23 00 state different joint limits for gypsum plaster, which limit governs the layout? |
| Accessory material and corrosion | Accessories notes (materials ASTM C1063 and C841 permit; PVC or plastic-coated aluminum instead of galvanized steel in humid climate zones and ESC C3 to C5 locations) + Accessories bracket (one standard, or only the materials listed) + design analysis climate zone and ESC + bead, joint, and screed callouts on the details | Has the specifier kept the bracket that limits accessories to named materials, so the contractor’s options do not include galvanized steel where the design analysis places the project in a humid or corrosive location, do the details name each accessory profile, such as casing bead, corner bead, control joint, and screed, since the article sets materials rather than a list of profiles, and do the profile depths suit the plaster thickness in Section 09 23 00? |
| Hangers, straps, rods, eyebolts, and anchorage | Hangers article (a stated ultimate load without failure of the support) and note (splayed hanger detail; corrosion-resistant suspension components in humid and ESC C3 to C5 locations) + Wires notes and bracket (galvanized or stainless wire; heavier wire at wider spacing or heavier loads) + Straps and Rods notes and brackets (kept where violent storms occur; galvanized, zinc, or cadmium coatings only) + Eyebolts and Masonry Anchorage Devices blanks (anchorage tied to ASTM C636/C636M) + ceiling sections and structural attachment notes | Does the hanger detail show the wire size, spacing, and splay the notes ask for, is heavier wire kept where the ceiling sections show wider hanger spacing, where the project is both humid or corrosive and subject to violent storms, which corrosion-resistant strap or rod material applies, since the strap and rod paragraphs offer only coated steel and the wire paragraph has no nickel copper option, are the eyebolt size and coating filled in, and since the anchorage paragraph cites a practice written for acoustical tile ceilings, has the specifier named the standard or the designed anchor for plaster loads? |
| Fire-rated assemblies, sound ratings, and access panels | Fire-Resistant Assemblies note and article (materials, methods, and fasteners per the UL design or GA 600 file number indicated) + Section 09 23 00 Fire Resistive Coatings (UL design or FM Approval Guide) + opening drawing note on STC ratings + Access Panels article (galvanized, galvannealed, or stainless; frames keyed for plaster; locking bracket) and notes (detail large panels and panels carrying applied finishes; swing-down clearance; no panels in rated walls or ceilings without the Government’s fire protection engineer) + Section 08 31 00 + mechanical, plumbing, and electrical plans | Does each rated plastered wall and ceiling cite a UL design or GA file number that the lath, plaster, and fastening actually match, since this section accepts GA file numbers and Section 09 23 00 accepts FM listings instead, are the access panels in plastered surfaces counted and located against the valves, dampers, and junction boxes they serve, and is every panel in a rated assembly either a rated panel approved by the fire protection engineer or moved? |
Worked example: gypsum lath in a shower room, a ceiling with no hanger detail, and a joint layout two sections disagree on
Illustrative example: a renovated officers’ club at a coastal installation that the design analysis places in a humid climate zone keeps three-coat gypsum plaster on the ballroom walls and on a large suspended ballroom ceiling with a curved cove, and the same plaster in the locker and shower rooms. The partition types call for gypsum lath throughout, including the shower walls and the cove. The issued Section 09 22 36 keeps the bracket that lets accessories follow ASTM C841, which permits galvanized and painted steel, keeps zinc-coated hanger wire, and leaves the paper backing room blank empty. The reflected ceiling plan shows the ballroom ceiling without control joints or a hanger detail, the cove meets the walls with corner reinforcement, and the elevations show no joints because the architect relied on the area limit in Section 09 23 00.
Ask the architect to change the shower and locker room walls and the cove to metal lath with stainless steel base metal and the paper backing those rooms need, to draw the ballroom ceiling as unrestrained with casing beads at the walls and joints at the spacing the lath section sets, and to add a splayed hanger detail. Ask the specifier to keep the accessories bracket that limits them to PVC or plastic-coated aluminum, to change the hanger wire to stainless steel, to name the gypsum lath product standard, and to state which section’s joint limit governs, and confirm with the structural engineer how the hangers attach to the existing roof framing.
Avoid a false conflict
Section 09 22 36 covers lath, plaster accessories, access panels, and ceiling hangers for gypsum and portland cement plaster. The framing, furring, and ceiling suspension behind the lath follow Section 09 22 00 and the non-structural metal framing guide, or Section 05 40 00 where load bearing, the plaster coats follow Section 09 23 00 Gypsum Plastering, exterior cement stucco carries its own lath, accessories, and hangers in Section 09 24 23 and the cement stucco guide, gypsum board and veneer plaster bases follow Sections 09 29 00 and 09 26 00, and access doors in other finishes follow Section 08 31 00, so check those before calling a requirement missing. Some of the section’s own wording needs resolving: the Gypsum Lath article cites only standards written for portland cement plaster and non-metallic lath, the notes ask for corrosion-resistant suspension in humid and corrosive locations while the strap and rod paragraphs offer only coated steel, the anchorage paragraph cites a practice for acoustical tile ceilings, and its joint limits and rated-assembly sources differ from those in Section 09 23 00. Ask the specifier which wording the project intends before treating a difference as a design conflict.
When requirements disagree, follow the project’s document-control and clarification process. Do not assume that drawings always override specifications, or the reverse. Identify the exact sources and request an authorized decision.
Close the issue across the affected documents
Record the location or tag, drawing and specification references, issue dates, observed difference, and the decision needed. Assign an owner and keep the item open until the response identifies the governing requirement. Check the revised drawings and specification references together; a response email alone may leave the issued package inconsistent.
For the overall process, use the guide to drawing and specification conflicts. Mark an inapplicable checklist row with a reason, and distinguish a verified correction from a question that still needs design information.
Where Groundbook fits
Groundbook’s drawing and specification review helps investigate potential disagreements in the documents you supply. Include the relevant specification sections and drawing references, then verify the cited evidence with the responsible reviewers before acting on a finding.