Actual Dimensions
Nominal Dimensions
Materials
100

What is the actual size of a 2 x 2?

1.5" x 1.5"

100

What is the nominal size of a 3/4" x 3.5" lumber?

1 x 4

100

Board made from plaster and heavy sheets of paper, is the finish material used on interior walls

Drywall

200

What is the actual size of a 2 x 4?

1.5" x 3.5"

200

What is the nominal size of a 3/4" x 5.5" lumber?

1 x 6

200

Tyvek, installed over wall sheathing to provide protection from water

House Wrap

300

What is the actual size of a 2 x 6?

1.5" x 5.5"

300

What is the nominal size of a 1.5" x 7.25" lumber?

2 x 8

300

Fiberglass, 16" wide, installed into walls and ceilings

Batt Insulation

400

What is the actual size of a 2 x 8?

1.5" x 7.25"

400

What is the nominal size of a 1.5" x 9.25" lumber?

2 x 10

400

Used for wall sheathing, floor sheathing, and roof sheathing; 4' x 8'

Plywood

500

What is the actual size of a 2 x 14?

1.5" x 13.25"

500

What is the nominal size of a 3.5" x 3.5" lumber?

4 x 4 

500

Exterior roof material

Asphalt shingles, comes in bungles