Let’s learn how to make a beautiful and precise stairway for homes or decks. Building stairs seems difficult, but it’s really fairly simple if you use the right formula. This is how you measure and construct professional-looking stairs with accuracy.

Before we can start the process of building stairs, we’ll need to take some measurements of the stairway area. We can think of it this way: we have a certain amount of height that we need to reach and we need to do it within a certain length or distance. The part of the stairs that helps us accomplish the height is the stair riser. The length part is the stair tread. The part of the stairs that will hold all the weight is called the stringers. The stringers are the most important part of the stairway.

The treads are usually a standard size of around 10-inches. The risers completely depend on the measured height from the bottom floor to the top floor.

Now we need to get an exact measurement from the bottom floor to the second floor, including the second floor particle board. Now, we use the formula for getting the height of each stair riser. Suppose the distance from bottom floor to top floor including the thickness of the second floor is about 9 feet or 108 inches.

108 divided by 7 equals 15.428. That tells us that 15 risers will be needed. Next, let’s divide 108 by 15 and we’ll get right around 7 inches or the exact height each riser needs to be. The treads need to be right around 10 inches. The amount of treads will be one less than the amount of risers, so to find the total run or length of the stairs, we just multiply 10 by 14 and that tells us that our stairway will be 140 inches long.

Now, try to find a knot-free 2×12 board for the stringer. We can also use prefabricated wood made for stair stringers or an even cheaper selection is strong softwood like Pine or Fir. It will need to be around one foot longer than the distance of the stairs. This would need to be 120-inches or twelve feet long.

Next, while the board is lying flat, measure up about 8 inches to mark the first stair tread. Use a carpenter’s square to measure 10-inches over (tread) and 7-inches up (riser). We’ll do this on every step. Once that is done, we’ll go back to the bottom of the board and measure and cut the first riser. We’ll use the carpenter’s square to make it exactly 7-inches.

When weve finished marking the stringer we can cut out the stairs with a handsaw or a Skilsaw. We will cut really close to the inside corner, but we’ll need to complete the cut with a handsaw to get completely into the corners. When we finish that we can use the stringer as a pattern or a template for the other stringers by it on top of the other boards and tracing in the steps.

Once everything is all cut out and the stringers are identical, we can stand them up and secure them with screws or nails. Once the stringers are screwed or nailed securely in place well put the tread plates on and then the riser plates if we want enclosed stairs. There are special tread boards available that are rounded in front. Theyre made for carpeted stairs. Many people like to have hardwood stairs that are exposed; in that case we would want to use high quality oak or some other quality hardwood. That’s how we make stairs for our home interior or our decks.