12x28 Shed Material List

Quick Answer

A 12x28 gable shed with 8 ft walls, 16 inch on center framing, 4/12 roof pitch, pressure treated floor framing, OSB or plywood sheathing, a basic double door, and gravel foundation is a large, long structure commonly used as a full workshop, equipment storage building, small vehicle garage, or major hobby space. The 12 ft width requires stronger framing than narrow sheds, and the 28 ft length dramatically increases total material quantities and layout complexity.

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You will need:

• Heavy pressure treated lumber for the floor system
• 2x4 wall framing
• 2x6 roof framing
• Extensive floor, wall, and roof sheathing
• Panel or lap siding
• Asphalt shingles and underlayment
• Reinforced double door framing
• Large quantities of fasteners and hardware

Realistic 2026 total material cost: $6,800 to $10,600

This assumes a gravel base and basic exterior finishes only.

Need a smaller option? See our 18x18 shed material list. Want more space? See our 12x30 shed material list.

Full Material List

Quantities assume 8 ft wall height, 16 inch on center spacing, and a standard double door on one gable end.

Floor Framing

A 12 ft span requires strong joists, while the long footprint demands many framing members.

Gravel Base

• 8 to 11 cubic yards of compacted 3/4 inch crushed gravel

Floor Frame (Pressure Treated)

Perimeter

• 2x10x28 PT – 2 (long rim joists)
• 2x10x12 PT – 2 (end band joists)

If 28 ft boards are unavailable, splice sections over blocking.

Floor Joists (16 inch OC across 12 ft span)

• 2x10x12 PT – 20 to 21

Floor Sheathing

• 3/4 inch tongue and groove plywood or OSB – 11 sheets

Fasteners

• Exterior-rated screws or galvanized framing nails
• Heavy-duty joist hangers recommended

Wall Framing

Framed 16 inch on center.

• 2x4x8 studs
• 160 to 180 total
• Includes perimeter walls
• Additional studs for corners and door framing
• Waste allowance

Plates

• 2x4x28 – 6 (long walls, double top plates + bottom plates)
• 2x4x12 – 6 (end walls)

Splicing shorter boards is common for very long walls.

Double Door Framing

Typical opening: 60 to 72 inches wide.

• 2x10x8 – 2 (header material)
• 1/2 inch plywood spacer
• Jack and king studs included in stud count

Roof Framing

A 12 ft span typically uses 2x6 rafters across a long ridge.

Rafters (4/12 pitch, 16 inch OC)

• 2x6x16 – 42 to 44
• Approximately 21 to 22 rafter pairs

Ridge Board

• 2x10x28 – 1

Collar Ties or Ceiling Joists

• 2x4x12 – 21 to 22

Sheathing

Long walls dramatically increase panel usage.

Wall Sheathing

• 7/16 inch OSB or plywood – 32 to 34 sheets
• Panel siding may eliminate separate sheathing

Roof Sheathing

• 7/16 inch OSB or plywood – 18 to 19 sheets

Siding

Panel siding is common for structures of this size.

T1-11 or LP SmartSide Panels

• 32 to 34 sheets

Alternative siding systems require additional trim components.

Roofing

Underlayment

• 2 to 3 rolls synthetic underlayment

Drip Edge

• 12 to 14 pieces (10 ft lengths)

Shingles

• Approximately 4.5 squares
• 14 to 17 bundles depending on waste

Roofing Nails

• 12 to 15 lb box

Hardware and Fasteners

• 16d framing nails or structural screws
• 8d nails for sheathing
• Exterior construction screws
• Construction adhesive (7 to 9 tubes)
• Hurricane ties recommended
• Heavy-duty hinges (3 per door)
• Exterior double-door latch or lockset
• Padlock hardware
• Flashing for door header

Estimated Cost Breakdown

Typical 2026 pricing ranges.

• Gravel Base: $400 to $850
• Pressure Treated Floor Framing: $1,600 to $2,600
• Wall Framing Lumber: $1,300 to $2,100
• Roof Framing Lumber: $1,100 to $1,800
• Sheathing (walls and roof): $2,200 to $3,300
• Siding (T1-11): $1,600 to $2,500
• Siding (LP SmartSide): $2,700 to $4,300
• Siding (Vinyl system): $3,500 to $5,600
• Roofing: $900 to $1,500
• Hardware and Fasteners: $400 to $750

Total Estimated Range

With basic panel siding: $6,800 to $8,700

With upgraded siding: $8,700 to $10,600

Costs increase due to:

• Large floor area (336 sq ft)
• Strong joists for wider span
• Long wall runs increasing stud count
• Extensive sheathing quantities
• Large roof surface area
• Reinforced door framing
• Increased fastener usage
• Availability of very long lumber can significantly affect pricing

If you want exact cut diagrams, printable framing layouts, and step-by-step blueprints for this 12x28 shed, detailed plans eliminate guesswork and reduce lumber waste.

Get the Complete 12x28 Shed Plans Here

Tools Required

Standard framing tools with sufficient workspace for long materials.

Essential tools:

• Circular saw
• Miter saw
• Drill and impact driver
• Framing hammer
• 4 ft or longer level
• Speed square
• Tape measure
• Chalk line
• Multiple ladders
• Shovel and rake
• Plate compactor or heavy hand tamper

Helpful tools:

• Framing nailer
• Roofing nailer
• Laser level
• Sawhorses
• Clamps

Assistance is recommended for handling long wall sections safely.

Step-by-Step Build Overview

High-level sequence only.

• Prepare and compact gravel base across full footprint.
• Build pressure treated floor frame and verify square.
• Install floor sheathing.
• Frame walls on the ground including double door opening.
• Raise walls with assistance, plumb, and brace securely.
• Install double top plates tying walls together.
• Install ridge board and rafters.
• Add collar ties or ceiling joists.
• Install roof sheathing.
• Install drip edge and underlayment.
• Install shingles.
• Install wall sheathing if required.
• Install siding.
• Build and hang double doors.
• Install trim and hardware.
• Frequent checks for square are essential over long distances.

Common Mistakes

• Losing square across very long walls. Causes roof and siding alignment issues.
• Using undersized floor joists for equipment loads. Leads to floor flex.
• Poor base preparation. Causes uneven settling.
• Underestimating materials. Leads to delays and extra trips.
• Weak door framing. Leads to sagging doors over time.
• Insufficient bracing during construction. Long walls can shift before roof installation.

Is It Worth Building Yourself?

DIY material cost: $6,800 to $10,600

Typical prebuilt 12x28 shed delivered in 2026: $12,500 to $22,000

DIY savings typically range from $5,700 to $11,400.

Consider:

• Build time of roughly 6 to 10 days with assistance
• Handling long materials
• Need for accurate layout
• Possible permit requirements

For homeowners comfortable with construction tasks, building yourself is usually financially worthwhile.

Get Exact Cut Diagrams and Printable Plans

This material list provides realistic quantities and cost expectations for a 12x28 shed.

It does not include:

• Exact rafter angle calculations
• Detailed wall framing layouts
• Header engineering details
• Precise overhang measurements
• Optimized cut lists
• Printable construction diagrams

On long structures, layout errors can waste significant time and material.

Detailed blueprints with exact measurements, framing layouts, and printable cut sheets simplify construction, reduce waste, and help ensure structural accuracy.

For large one-time builds, complete plans typically save more time and money than they cost by preventing mistakes and rework.

Get the Complete 12x28 Shed Plans Here