HOW TO CALCULATE THE EXPECTED WASTE FACTOR FOR THIN STONE INSTALLATIONS

Your Waste Factor for Stone Veneer Installation

Natural stone installation requires masonry techniques such as cutting, splitting, sorting, and trimming stones to fit the desired finished area. The amount of stone cut and/or trimmed during the installation process is referred to as the “waste factor”. The amount of waste per job is dependent on the project requirements including how tight the finished joints are desired to be. Tighter joints require more trimming which generates more waste. A higher waste factor requires more stone to be consumed.

For example, lets say you are looking to cover an area that is 100 ft x 10 ft (1,000 SF). Based on your mock up, you are expecting a 30% waste factor. This means that you will need to purchase 1,300 SF (1,000 SF + (1,000 SF x 30%) ) of material in order to cover the desired area.

Calculate the Amount of Stone Veneer Needed Including Waste Factor









Performing the Calculations Manually:

1.) Multiply wall height (step 1) X wall width (step 2):   ____________  X  ____________ =  ____________  Total square feet of surface area

2.) Multiply height of all corners (step 3) X 75% coverage gained per lineal foot of corners:  ____________  X  0.75  =  ____________ Total surface area covered by corners

3.) Subtract the surface area covered by corners (step 2) from the total square feet of surface area (step 1):  ____________  –  ____________  =  ____________ Total square feet of flats needed not including waste

4.) Add the expected waste to the total square footage of flats needed (step 3): ____________  +  ____________  =  ____________  Total square feet of flats needed

Calculate the expected waste factor for thin stone installations. The waste factor refers to the amount of stone cut and/or trimmed during the installation process. The amount of waste per job depends on the project requirements, including how tight the finished joints are desired to be. Tighter joints require more trimming, which generates more waste. A higher waste factor requires more stone to be consumed.

Here’s how to calculate the amount of stone veneer needed, including the waste factor:

  1. Multiply wall height by wall width to get the total square feet of surface area.
  2. Multiply the height of all corners by 75% to get the total surface area covered by corners.
  3. Subtract the surface area covered by corners from the total square feet of surface area to get the total square feet of flats needed, not including waste.
  4. Add the expected waste to the total square footage of flats needed to get the total square feet of flats needed, including waste.

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