Checklists by trade
3 lists · 12 items · 21 photosGypsum concrete underlayment inspection checklists
Gypsum concrete underlayment inspection checklists for the rough-in, final and punch walks: 3 free lists, 12 items and 21 photo requirements, each item naming what to look for and the photo that proves it.
The gypsum concrete underlayment walks, in build order
Gypsum concrete underlayment Rough-in· Gypsum concrete underlaymentGypsum concrete underlayment rough-in inspection checklistSubstrate, primer, sound mat and edge damming verified before the pour buries them5 items9 photosGypsum concrete underlayment Final· Gypsum concrete underlaymentGypsum concrete underlayment final inspection checklistThickness, hardness and cured moisture verified before floor goods go down, with the surface checked for cracks4 items7 photosGypsum concrete underlayment Punch· Gypsum concrete underlaymentGypsum concrete underlayment punch checklistCloseout walk for cracking, soft or dusting areas and edge and penetration touch-up3 items5 photos
Where each walk sits in the schedule
- Gypsum concrete underlayment rough-in inspection checklistrough-in
- After the subfloor is fastened and dry and penetrations are set, and before the pour, since none of the prep can be inspected once the slurry covers it. Run by: The underlayment crew lead walking the floor ahead of the pump, with the GC's superintendent releasing the area.
- Gypsum concrete underlayment final inspection checklistfinal
- After the pour has set and dried and before floor goods are installed, since moisture and soft spots trapped under finish flooring cause callbacks. Run by: The GC's superintendent with the underlayment crew lead, before the flooring contractor takes the floor.
- Gypsum concrete underlayment punch checklistpunch
- During closeout before floor goods, once other trades have trafficked the underlayment and any drying cracks have shown. Run by: The underlayment crew lead on a callback, or the GC's superintendent closing floor-prep punch before the flooring goes in.
What most often sends gypsum concrete underlayment work back
- Poured over a bare, unprimed wood deck so the underside dries too fast and the bond and surface suffer.
- Sound mat seams left open or the mat crushed by traffic, so the acoustic rating and pour depth are both off.
- Floor penetrations and unit-to-corridor edges not dammed, so the slurry runs into the ceiling below or out the door.
- Flooring installed before the gypsum dried to the flooring manufacturer's moisture requirement, so the finish floor buckles or debonds.
- Surface left soft or dusting because the pour dried too fast or was walked too early, and the primer for floor goods won't hold.
- Thin areas over a high spot in the deck never caught, so the underlayment cracks under load right there.
- A crack skimmed with patch that reopens because the deck movement under it was never addressed.
- A dusting area primed straight over, so the floor-goods adhesive lifts with the loose surface.
Common questions
- Which gypsum concrete underlayment inspections do these checklists cover?
- Gypsum concrete underlayment rough-in inspection checklist (rough-in): After the subfloor is fastened and dry and penetrations are set, and before the pour, since none of the prep can be inspected once the slurry covers it. Gypsum concrete underlayment final inspection checklist (final): After the pour has set and dried and before floor goods are installed, since moisture and soft spots trapped under finish flooring cause callbacks. Gypsum concrete underlayment punch checklist (punch): During closeout before floor goods, once other trades have trafficked the underlayment and any drying cracks have shown.
- Who runs a gypsum concrete underlayment inspection?
- The underlayment crew lead walking the floor ahead of the pump, with the GC's superintendent releasing the area. The GC's superintendent with the underlayment crew lead, before the flooring contractor takes the floor. The underlayment crew lead on a callback, or the GC's superintendent closing floor-prep punch before the flooring goes in.
- What most often sends gypsum concrete underlayment work back?
- Poured over a bare, unprimed wood deck so the underside dries too fast and the bond and surface suffer. Sound mat seams left open or the mat crushed by traffic, so the acoustic rating and pour depth are both off. Floor penetrations and unit-to-corridor edges not dammed, so the slurry runs into the ceiling below or out the door. Flooring installed before the gypsum dried to the flooring manufacturer's moisture requirement, so the finish floor buckles or debonds.
- Can I run these checklists in RTI?
- Yes. Start a free RTI workspace and load any of the 3 lists (12 items in total). The Photo Gate holds the submit button until every mandatory item is answered and its photos are attached, and approved inspections roll into a branded turnover package with a tamper-evident audit trail.