How to Invoice After Garage Drywall: Fire Tape to Paid

Short answer: How to invoice after garage drywall: write one board line per code location — 1/2 inch on the walls separating the garage from the residence and attic, 5/8 inch Type X on the ceiling under habitable rooms — with thickness, type, and sheet count on each. State the finish level, because a garage is a Level 2 job unless somebody bought paint. Bill ceiling square footage at a higher rate than wall, bead by the linear foot, and collect when the separation inspection passes.

A garage is not a small basement. The board schedule is dictated by a code section, a third party signs off on the result, and the finish is usually one coat rather than three. That means the invoice reads like a specification instead of a room description, and the collection moment is an inspection rather than a walkthrough. The general blocks live in what to include on an invoice; what follows is the garage-only part.

Why does the garage invoice read like a code document?

Because the board is a fire separation, not a wall finish. IRC R302.6 sets the minimums: not less than 1/2-inch gypsum board applied to the garage side of walls separating the garage from the residence and attics, and not less than 5/8-inch Type X where there are habitable rooms above the garage, applied to the garage ceiling, with 1/2-inch on the garage walls supporting that floor-ceiling assembly. Local amendments change details — Minnesota’s state adoption of Section R302 is a good example of how a jurisdiction restates it — and your inspector is the final word.

Three consequences for the paperwork. Your board choice is a specification you have to be able to prove, so thickness and type belong on every line. The stickers on the back of the board are the proof, which is why a scrap with the stamp visible belongs in the photo set. And an inspector is going to look at this before anyone pays you, so the invoice should follow the same map the inspector walks.

How do I write the board lines by location?

One line per location, in the order the inspection covers them.

Location	Board	Why that board
Wall between garage and residence	1/2” minimum, garage side	The R302.6 separation
Wall between garage and the attic over the residence	1/2” minimum, garage side	Same section, routinely missed
Ceiling with habitable rooms above	5/8” Type X	The rated board is called for here
Garage walls supporting that floor-ceiling assembly	1/2” minimum	They hold up the rated assembly
Ceiling with attic only above	Per your local amendment and inspector	This line varies more than any other
Man-door jamb return and header wrap	Matches the wall it sits in	Keeps the separation continuous
Bump-out at the panel or water heater platform	Same as the adjacent wall	Cuts and fits, not extra area

Sheet selection is worth a line of explanation on the estimate, because it drives labor. A garage has long unbroken walls and a single ceiling plane, so 4x12 board at 48 ft² a sheet cuts butt joints dramatically compared to 4x8 at 32 ft² or 4x10 at 40 ft². The catch is weight: a 4x12 sheet of 5/8 Type X is a two-person board or a panel lift, and if the lift is rented it is a line on the invoice, not an absorbed cost.

Fire tape or Level 4 — which one did they actually buy?

This single fork moves the price more than anything else on the page, so the level number goes on every finish line.

Level	What it is	Garage reality
1	Tape set in compound, tool marks fine	Concealed rated assemblies
2	Tape embedded and wiped, one coat on fasteners, tool marks and ridges acceptable	The default — GA-214 names garages specifically
3	Two coats, no skim	Textured garage walls, uncommon
4	Three coats and sanded	Garage converted to a gym, shop, or living space
5	Full skim over the whole surface	Detail shops and showroom garages, rare

The Gypsum Association’s GA-214 description of Level 2 is the one to quote when someone asks: it is typically specified as a substrate for tile, or in garages, warehouse storage, and similar areas where surface appearance is not a concern. Builders call it fire tape. It is roughly one pass instead of three, with no full sanding, which is why a Level 2 garage and a Level 4 garage of identical square footage are not close in price.

The trap is predictable. The owner says “just fire tape it,” then decides in month four to paint the garage, then calls you about the tool lines showing through. Print “Level 2 per GA-214” on the finish line and get the acceptance against that number. If they later want paint, that is a Level 4 change order covering a second and third coat over every joint and fastener plus sanding across the entire area — which is most of the finish labor you correctly did not perform the first time.

Where does the measured quantity come from?

Field measurement after the hang, reconciled against the delivery ticket. Garages are the easiest room in the house to measure and the easiest to argue about, for one reason.

Walls are perimeter times height. The argument is the overhead door: it is a large opening, and whether you deduct it changes the number materially. Either convention is defensible — gross with no deduction under a stated opening size, or net with the deductions listed — but state which one you used on the invoice and never mix the two inside one document. Ceilings are the plan footprint, one plane, no deduction.

Then the garage-specific quantities that are not square feet at all:

• Corner bead, by the linear foot. The overhead door header wrap and jamb returns, the man-door return, the step at the service door, and every corner on a panel or water heater bump-out. A garage has less bead than a basement and more than a bedroom, and it is always undercounted at the header.
• The header wrap itself. Small area, awkward position, three edges. Its own line.
• Waste factor. Long unbroken runs and a single ceiling plane mean a garage usually lands at the bottom of the 10 to 15 percent band rather than the top — the opposite of a soffit-heavy basement. Bidding a garage at 15 percent is quietly building in margin, which is fine as long as you know you did it.

Multiply boards hung by sheet area and check it against your measured square footage plus waste. When the two disagree, find out why before the invoice goes out rather than after.

What changed between the estimate and the invoice?

Garages change for code reasons more than for taste reasons, and each change deserves its own dated line naming who approved it and how.

What happened	What it added
Bonus room framed above the garage after the bid	Ceiling upgraded to 5/8 Type X — heavier board, a lift, and slower hang
Inspector called for the rated board on the walls too	A board swap across the full wall area
Owner decided to paint	Level 2 upgraded to Level 4 over the whole surface
Panel and water heater platform framed in	Extra cuts and a run of bead nobody counted
Overhead door opening resized	Header wrap and jamb returns redone
Electrician cut in after the board went up	Patching the separation, plus firestopping at the penetrations

Folding any of these into the base square footage looks like a price increase. Shown as “ceiling board upgraded to 5/8 Type X, 462 ft², approved by text 4/9” it looks like a record.

How do I rate 5/8 Type X instead of borrowing a number?

Give it its own hang rate. A surcharge bolted onto your 1/2-inch rate will be wrong, because the difference is weight and handling, not material cost. The drivers that actually move a garage number:

Driver	Effect
Board thickness and type	5/8 Type X is heavier and slower to hang than 1/2 — separate rate, not a percentage
Ceiling versus wall	Overhead work is slower and harder on a crew, and a garage ceiling is one high plane with nothing to brace against
Ceiling height	9, 10, or 12 feet, or open trusses — decides lift, staging, and crew size
Finish level	Level 2 to Level 4 is a multiple on finish hours, not a bump
Sheet length	4x12 cuts butt joints and finish time but requires two people or a lift
Waste	Long runs mean low waste — the bottom of the band

Then build the number from your own costs. Material comes off coverage: sheets equal measured area times one plus waste, divided by sheet area, rounded to full bundles; screws by the pound per 1,000 ft²; tape by the roll; compound by the box counted per coat; bead by the stick. Labor comes from hours you actually timed — separately for hang and finish, and separately again for the rated board — times your loaded hourly cost, meaning wage plus burden plus truck, insurance, and tools. Add overhead spread across the productive hours you really sell. Then add margin, and use the right formula: price equals cost divided by one minus the margin. Cost times one plus the number is markup, and it lands short — a 25 percent markup on cost delivers a 20 percent margin, not 25. Published per-foot ranges are only good for catching a factor-of-two mistake; they swing with region, ceiling height, board type, and season, and none of them know your crew.

What do I hand over, and does an inspector sign it?

Yes, and that changes the sequence. Photograph before anything gets covered: the taped joints, the fastener pattern, a board scrap with the type stamp visible, and every penetration. Those images are the only record that the right board went up once paint or storage shelving is in front of it.

Firestopping at penetrations is the classic no-man’s-land item — the electrician’s boxes, the dryer vent, the plumbing chase. Name it on the invoice as included or excluded. An unassigned penetration is what fails an inspection and costs everyone a day.

Put the inspection date and result on the invoice itself. For a builder, that line is the deliverable. For a homeowner, it is the document a buyer’s inspector will ask about at resale, and it is the reason they should pay you the same afternoon. Add the debris and cleanup state, the before-and-after photos by area, and your warranty language for first-year fastener pops.

Collect at the pass. Invoice from the phone while you are still in the garage and let them scan the payment QR code; hand over a receipt rather than a duplicate invoice, since those are different documents. On builder work you are on their draw schedule instead, usually with retainage and a lien waiver traded for the check, so read which waiver form you are signing.

What records make the invoice hold up?

The measured takeoff, the delivery ticket, the pre-cover photo set with the board stamp in it, the change-order texts, the inspection result, the numbered invoice, and the supply receipts behind each line.

Keel is an iOS app that keeps all of that on the phone and nowhere else — no account, no bank connection, no cloud, no login, and an App Store privacy label reading Data Not Collected. The invoice goes out before the lift is loaded, in about a minute, with your own numbering, your logo and brand color, one line per code location with thickness and type on it, and the payment link rendered as a QR code the customer scans standing in the garage. Board, compound, bead, and screw receipts get photographed at the supply counter and read on device by Apple Intelligence, so a disputed change order has paper against it instead of a memory. The ledger is append-only and hash-chained, meaning the record of what you billed and when does not quietly change — the property that matters when a builder’s accounting department reopens a closed draw. Freeboard shows what is genuinely yours after the tax reserve and the invoices you have already committed to, which is the number behind how much to set aside for 1099 taxes. Free covers unlimited invoices, receipts, and mileage; Keel Pro is a one-time $249.99 Lifetime purchase, not a subscription. You can get it on the App Store.

Frequently asked questions

What thickness of drywall goes in a garage? Under IRC R302.6 the minimum is 1/2-inch gypsum board on the garage side of walls separating the garage from the residence and attics, and 5/8-inch Type X on the garage ceiling where habitable rooms sit above, with 1/2-inch on the garage walls supporting that assembly. Local amendments vary and your inspector decides, so confirm before ordering and put the thickness and type on every invoice line.

Is fire taping enough for a garage, or does it need a full finish? Fire tape is what builders call a Level 2 finish, and GA-214 names garages specifically as an area where Level 2 is appropriate — tape embedded and wiped, one coat on fasteners, tool marks acceptable. It is the standard unless the garage is being painted or converted. A Level 4 finish is a separate scope with two more coats and full sanding, and it should be priced as its own line.

How do you measure a garage for drywall? Walls are the finished perimeter times the ceiling height, ceilings are the plan footprint as a single plane, and corner bead is counted in linear feet at the overhead door header wrap, the jamb returns, the man door, and any bump-out. Decide whether you deduct the overhead door opening, state that convention on the invoice, and use it consistently throughout the document.

What does a garage drywall invoice need that a bedroom invoice does not? Board thickness and type on every line, the code location each line covers, the inspection date and result, and a stated position on firestopping at penetrations — included or excluded. It also needs the finish level written as a number, since a garage is normally Level 2 and a bedroom is normally Level 4, and the two are nowhere near the same amount of finish labor.

When do I collect on a garage drywall job? For a homeowner, when the separation inspection passes — invoice from the phone in the garage and let them scan the payment QR code that afternoon. For a builder, you are on their draw schedule with retainage held and a lien waiver exchanged for the check, so submit the inspection result with the invoice and read the waiver type before you sign anything.

How many sheets of drywall does a garage take? Take the measured wall and ceiling square footage, add 10 to 15 percent for waste, and divide by the area of the sheet you are running — 32 ft² for 4x8, 40 for 4x10, 48 for 4x12. Garages typically land near the bottom of that waste band because the runs are long and unbroken. Round up to full bundles and check the total against the delivery ticket.

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This article is general information, not professional or tax advice.