Is there a home improvement in your future? Help keep your project on schedule and within budget - work out the quantities of building materials you’ll need in advance.
Here’s how to figure amounts for 10 popular house and garden building materials. (Learn to calculate square footage and cubic footage for home improvement here.)
Important: If you plan to hire a contractor to handle your project, get their professional guidance before you purchase materials.
Calculate the square footage of all walls you plan to paint, plus the ceiling if appropriate. Then subtract doors and windows. Estimate 20-square-feet per door or 15 per average-sized window. Add the square footage of bays and bump-outs.
Estimate approximately one can of paint for every 350 square feet you plan to cover. Buy more if you’ll be painting on unfinished drywall or applying a light color over dark.
Find the square footage of your wall space to be covered, minus floors and windows (using the calculation described above). Divide this figure by the number of square feet per roll of wallpaper. Round the answer upward to allow for matching and wastage.
Once again, calculate your walls’ square footage, minus windows and doors. Drywall for residential use is generally sold as 4x8 sheets. Plan your drywall layout to minimize seams.
Ceramic or porcelain tile
For ceramic or porcelain tile, use as your base number the square footage of your floor, backsplash, etc. Add approximately 10-15% to allow for cutting and breakage, more if your room layout or tile design is complex. You may also want to stock up on a few extra tiles for future repairs.
Porcelain and ceramic tile is usually sold by the box. Check the square footage which your chosen tile will cover; a box tends to contain between 10 and 15 square feet.
Get the full article at https://www.networx.com/article/building-materials-how-much-to-buy.