How To Build Deck On A Slope

Sloping ground presents a number of challenges when attempting to build a deck. Since the ground is not flat, building a level deck requires accounting for the severity of the grade the land slopes to make sure your construction is stable. In fact, building a deck on sloped land create living and recreational space because without a flat surface, this type of property is almost impossible to use. An attractive, usable deck will not only enhance your lifestyle but will also increase property values.

Step 1: Dig the Foundation Holes

Dig 1-foot diameter holes at the top of the slope that will hold supports for one side of your deck. Make sure these are deep enough by digging until you find solid soil.

Step 2:– Deck Poles

Place a deck pole in each hole allowing at least a foot higher extension than where you plan the deck to sit. The tops of the poles will be cut to fit later once all poles are set and the deck height is finally determined.

Step 3: Fill in the Holes

Mix enough concrete to fill each hole. Use a level to check to make sure each post is straight while the concrete sets.

Step 4: Mark Second Side

Once the first side of support posts is installed, use string attached to the first poles extending this across the surface area to where you wish to place the opposite posts. Mark the spot where the new set of poles will go.

Step 5: Additional Posts

At the lower end of the sloped deck area, once again dig 2 post holes where previously marked. Install two additional posts holding the string attached to the other side high enough up to make sure the posts are long enough to support the deck once leveled. Fill these holes with concrete making sure they are level as the concrete sets.

Step 6: Mark Where the Floor Goes

Using the string attached between posts on opposing sides, check to make sure it is straight and level and then mark each post indicating where the deck platform will attach.

Step 7: Frame the Deck

Frame both sides of the deck by installing 6 by 2-inch beams (choose a favorite wood) using 3-inch nails or deck screws.

Step 8: Floor Beams

Install floor beams to your deck frame using 3-inch nails. Once these support beams are in place, lay down the deck boards across the beams attaching these with nails or deck screws.

Step 9: Wood Finish

Choose an exterior use stain or paint to finish your new deck. Sandpaper all rough areas before coating with paint or stain Allow for drying before applying several layers of protective material such as polyurethane coating.

Since the surface area is rather large, consider renting professional sanding equipment to get the smooth surface necessary for successful finishing.