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Rules of Thumb

Block Brick Buying Cement Concrete Concrete Plaster Filling Block Mortar Pavers
Plastic Pipe Rebar Sand-Gravel Surface Bonding Cement Wall Tiles White Sand Zonolite

BLOCK

   • 2-1/2 Bags Mortar per 100 Block (40 Block per Bag)
   • 800 lb. Of Sand per 100 Block
   • 1.125 Block per Sq. Ft. of Wall Area
   • 75% of Length of Wall Gives Number of Block per Course
   • Take Height of Wall (in feet) Times 1.5 for Number of Courses
   • Divide Total Sq. Ft. of Wall by 0.89 to Figure Total Number of 8 x 16 Block

   BRICK

   • Approximately 7 Bags of Mortar per 1000 Brick (143 Brick per Bag)
   • Approximately 1 ton of Sand per 1000 Brick
   • Figure Brick 7 per Sq. Ft. of Wall Area (Allows for Waste)
   • 1-1/2 Brick per Running Foot of Wall
   • 4.625 Courses of Brick per Foot of Wall Height
   • 5 Brick per Square Foot for Paving, Hearths (Laid Flat-Solid Brick)

   BUYING CEMENT

   • Portland Cement = 94 lbs. Per Bag = 1 Cubic Foot
   • Masonry Cement = 70 lbs. Per Bag = 1 Cubic Foot
   CONCRETE

   • 4-2-1 Mix — 1 ton Gravel, 1/2 ton Sand, 6 Bags Cement
   • FIRE CLAY 2 Parts Fire Clay, 3 Parts Cement

   CONCRETE PLASTER

   • 1/4" Thick (100 sq. ft.) - 220# Sand and 0.8 Bag Mortar
   • 3/8" Thick (100 sq. ft.) - 330# Sand and 1.2 Bag Mortar
   • 1/2" Thick (100 sq. ft.) - 440# Sand and 1.6 Bag Mortar

   FILLING BLOCK

   • Cores with Concrete (approximately):
   • 8" Block - 0.93 Cubic Yards per 100 Block
   • 10" Block - 1.29 Cubic Yards per 100 Block
   • 12" Block - 1.64 Cubic Yards per 100 Block

MOTAR

   • Mix 1 Part Mortar to 2 to 2-1/2 Parts Sand
   • (1 Bag Masonry Cement to 220-275 lbs. Sand)

   PAVERS

• Take Square Foot of Area and Multiply by 4.5 to Get Number of Pavers

PLASTIC PIPE

• Approximately 100 lbs. Gravel per Running Foot of Pipe

REBAR

   • 8" Rebar - 1.1 Cubic Yards per 100 Block
   • 10" Rebar - 2 Cubic Yards per 100 Block
   • 12" Rebar - 2.7 Cubic Yards per 100 Block

   SAND-GRAVEL

   • Approximately 3000 lb. Per Cubic Yard (# Yards Times 1.5 for Tons)
   • Approximately 110 lb. Per Cubic Foot (27 Cubic Feet in 1 Cubic Yard)

   SURFACE BONDING CEMENT

• 50# Bag has 35-40 Square Feet for 1/8" Thick Coating

WALL TIES

• 1 per Every 10 Brick (100 Wall Ties per 1000 Brick)

WHITE SAND

   • Plaster and Stucco - No. 1 or 2
   • Sandblasting - No. 1,2,3, or 4
   (No. 1 for Finer Jobs, the Higher the Number, the Coarser the Sand)

   ZONOLITE

• 4 Cubic Foot Bags Fills Approximately 9 - 12" Block or 16 - 8" Block