Field

What is attic stock in construction?

Attic stock is the extra material, such as spare floor tile, ceiling panels, carpet, or paint, that the specifications require the contractor to deliver to the owner at the end of the job for future repairs.

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Plan reviews connect field conditions, drawings, and the next decisions on a job. AI-generated illustration.

Attic stock, sometimes called extra stock or maintenance materials, is surplus material left with the building owner at closeout. The idea is practical. Five years from now, when a forklift cracks a floor tile or a leak stains ceiling panels, the owner can replace them with the same dye lot and finish instead of patching with something that does not match.

The quantity is not left to chance. The specifications for each finish usually state it, often as a percentage of the installed quantity or a number of full boxes or cartons. Closeout sections in Division 01 typically say how it must be packaged, labeled, and delivered.

How attic stock works on a real job

Say a GC is finishing a three-story office building. The spec requires attic stock for carpet tile, resilient base, acoustic ceiling panels, and paint. The flooring sub orders carpet tile for the installed area plus normal waste, plus the extra cartons the spec requires, all from the same dye lot.

At turnover the superintendent walks the owner's facility manager to a storage room. Each carton is labeled with the product name, color, room or area used, and the spec section. The facility manager signs a receipt listing every item. That receipt goes into the closeout binder along with the O&M manuals.

Example attic stock receipt
ItemSpec sectionQuantity deliveredReceived by
Carpet tile, color AFlooring section6 cartonsFacility manager
Acoustic ceiling panelsCeiling section4 cartonsFacility manager
Wall paint, corridor colorPainting section5 gallonsFacility manager
Rubber base, 4 inchResilient base section2 rollsFacility manager

Pricing and buying attic stock

Attic stock is a cost in the bid, not a favor at the end. Estimators should read every finish section for extra stock language and carry it in the quantity takeoff. Subs should list attic stock as a separate line or note it in their scope, so the GC can confirm it is included during bid leveling.

Buy it with the main order. Ordering tile or carpet later almost guarantees a different dye lot, which defeats the purpose.

Common mistakes and disputes

  1. Missing the requirement in the bid, then arguing at closeout over who pays.
  2. Using attic stock to cover installation shortages. When the crew runs short and pulls from the extra cartons, the owner gets less than the spec requires.
  3. Leaving material in the building without a signed receipt. If it disappears, the owner will say it was never delivered.
  4. Poor labeling. Unlabeled boxes in a janitor's closet are useless five years later.
  5. Storing it where the trades keep using it. Keep attic stock locked until turnover.

Related terms

Attic stock is part of closeout along with the punch list, warranties, and as-builts. See how to close out a construction project. Smart Business Automator can track material deliveries and closeout items by job, so attic stock is confirmed before final payment is requested. See construction workflow automation.

Frequently asked questions

Who pays for attic stock?

The contractor, as part of the contract price, when the specifications require it. It should be included in the estimate and the subcontractor's scope.

How much attic stock is required?

Whatever the specifications say for each product. It is often stated as a percentage of the installed quantity or a number of full cartons, and it varies by owner and product.

Can leftover material count as attic stock?

Only if it meets the spec: correct product, same lot, full unopened packages if required, and labeled. Opened partial boxes often do not qualify.

When is attic stock delivered?

At closeout, usually before final completion, with a signed receipt from the owner's representative.

Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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