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How to Build a Shed (with a Record 100+ Pics, Vids, and Diagrams!)

Posted By Ethan On May 22, 2014 @ 7:00 am In Best of OPC,Construction,Exterior,Pro-Follows,Project Guides,Shed | 55 Comments

This article is part of our library of DIY and expert Project Guides [1] that share step-by-step explanations for a wide range of home improvement projects. As part of building this library, I follow expert contractors to the job site, documenting their steps, tips, techniques, and tools. We’re striving to be the best on the web! If you like what you read, please subscribe to our feed [2] to keep up with all of the latest projects!

Most of last week, I followed expert general contractor and carpenter Steve Wartman [3] and his crew as they built this great looking backyard shed. This article covers all of the details for building the shed’s foundation and subfloor, framing its walls, constructing a hip roof, installing a double door and windows, adding siding, laying shingle, and much more. Below the step-by-step instructions you’ll find a cost comparison for building vs. buying a shed, as well as additional resources for your own shed project.

If you’re looking for a contractor in the greater Baltimore area, I suggest you give Steve a call. He brings over 25 years of knowledge and experience, and this article is a great example of the quality of work he and his crew perform. To see more of Steve’s work, check out our article for building a deck [4] and installing drywall [5].

Introduction

Most homeowners that want a backyard shed will have one built off-site and delivered to their home. (Here’s a video of a typical pre-built shed delivery [6] we filmed in Fred and Kim’s backyard.) Unfortunately, shed delivery is not an option for all homeowners, and a common barrier is inadequate access. That’s why Steve and his crew were hired to build this shed. I’ll let him introduce the project.

Video Summary: The plan is to build a 10′x12′ shed. The homeowners are preparing to add an in-law suite to the back of their home, and this shed will provide storage for outdoor furniture and lawn equipment. The shed is deliberately planned for 120 sq. ft. because this is the maximum sized shed you can build in this area without pulling structural building permits. This shed will feature a foundation of solid, concrete block pillars, 2×4 framing, a hip roof that match’s the house’s roof design, and architectural shingles.

Step 1: Prepare the Site and Build the Foundation

After determining a location for a shed, it’s important to give it a solid, level foundation that will properly handle rain and moisture. Steve’s team accomplished this by digging out a 10′x12′ area with an additional 8″ of clearance on all sides. They lined the perimeter with pressure-treated 4x6s, sometimes going as many as three rows deep to handle a slight slope in the landscape. The crew used 20″ rebar to secure it to the ground, and 10″ Timberlok heavy-duty, wood screws to pull all the boards tight.

Pro-Tip: Timberlok 10″ wood screws should be installed through the face of one board into the end grain of the next (for all boards), and then down the top board through two or three boards.

The crew was able to reuse some of the excavated dirt to fill in low areas, being careful to tamp everything down to eliminate voids. They made ten foundation columns by stacking concrete blocks on undisturbed ground. Each column is composed of three solid 4″ blocks, glued to each other with construction adhesive. Using a line level, they ensured that all of the foundations were the same height, level, and equally spaced around the perimeter.

Pro-Tip: Foundation columns must be built on undisturbed ground. This is vital because undisturbed ground will not shift (potentially creating structural instability).  Tamped dirt is not a reliable substrate for setting these columns, so care must be used when digging out the area.

Pro-Tip: Pouring a concrete slab foundation is a viable alternative to this method; however, it introduces additional concerns, such as frost heaving in colder areas. The shed design would also need to change to incorporate a 4×4 pressure-treated skid under the floor joists to allow rain and moisture to escape. The foundation design we present addresses these concerns, and is more cost effective than pouring a pad.

(See also: How to Pour a Solid Concrete Shed Base [7])

The crew filled in the perimeter with 2-4 inches of crushed rock. This provides a path for water to escape so that moisture doesn’t accumulate underneath the shed. It also looks nice in the finished product.

Step 2: Build the Outer Band Board

This shed features double band board construction, which means the perimeter of the bottom frame comprises a double ring of pressure treated 2×6 boards. The additional ring is helpful, because it adds to the structural integrity of the shed and provides a wider nailing surface for securing the walls to the floor.

For a 10′ x 12′ shed, the outer band board length and width should be 10′ x 12′, which is the full size of the shed. The inner band board (described in Step 3) fits inside this frame, and must be 3″ shorter in both dimensions (9’9″ x 11’9″) to fit snugly.

Step 3: Build The Inner Band Board and Floor Joists

The inner band board is constructed with joists spanning the shed’s width (front to back). The crew secures these joists with Simpson joist hanger ties and nails through the face of the band board. The joists are 2x6s placed 16″ on center (oc). Use of hanger ties and face nailing provides the necessary strength to hold the full weight of the shed and its contents.

Pro-Tip: It’s important to check the band boards for square by measuring both diagonals (corner to opposite corner). If they measure the same, the structure is square. If not, you must rack the frame to get to square before fastening the inner and outer band boards together.

Pro-Tip: We recommend a pneumatic framing nailer to install nails through the band board into the grain of the joist. This can be accomplished by hand (i.e., with a hammer), but would be far more time consuming.

This inner structure fits snuggly inside the outer band board frame.

The crew nailed the double band boards together, but not before confirming that everything was still square.

Step 4: Install the Subfloor

Steve is a big fan of Advantech flooring for its superior weather resistance. Using Advantech results in less warping, twisting and delaminating than would be present if traditional plywood or OSB were employed. If you check Advantech’s Website [8], you’ll see that they claim the lowest water absorption rates in the industry.

Pro-Tip: Fir plywood is a suitable alternative to Advantech if Advantech is not available. It is priced similarly.

Steve’s crew oriented the subfloor to keep the groove side exposed for the next row. This is important because it allowed the crew to setup a “beater block” to drive each sheet snug without damaging the tongue.

Next, the crew screwed the subfloor in place, taking care not to drive screws too close to the groove and create an obstruction for the next sheet.

Pro-Tip: Typical 2″, #8 screws are appropriate for this job. Screws should be driven every 12″ along the joists and the perimeter.

Pro-Tip: We recommend keeping screws six inches back from the groove until the next sheet is installed. If you install the screws too close to the edge before installing the next sheet, the next sheet will be VERY hard to get into place.

(See also: Installing a Plywood Subfloor in a Habitat Home [9])

The crew staggered the joints for each row and marked the location of the joists to enable easy fastening.

Pro-Tip: Plywood joints should be staggered lengthwise. This reduces potential floor bowing in the final installation.

Step 5: Frame the Walls

Pro-Tip: Dimensional lumber is often curved or bowed. Before you begin framing, it’s important to check each piece for warping, and if necessary, orient them all identically. In this video, Steve shares some pro tips for checking and marking boards.

This shed features 2×4 framing with studs placed 16″ on center. The crew framed the front wall first. This wall was the most complicated, because the front wall includes the door and two windows.

To frame the front wall, Steve’s crew began by measuring stud locations on the top and bottom plates. For this step, it’s useful to understand a bit of stud vernacular:

  • King Studs or Common Studs: Span from the top plate to the bottom plate (the full height of the wall).
  • Jack Studs: Support headers, which span above doors and windows.
  • Cripple Studs: Used above or below windows and doors.

Pro-Tip: Many lesser quality sheds are constructed with 2×3″ boards at 24″ on center to meet a lower price point. Beware of this type of construction, as it is much more likely to result in bowed walls.

In this picture, the king stud locations are marked with X’s, and the jack stud location is marked with a J. Placing three king studs on the end isn’t necessary (you could get away with only two); however, the third stud provides a nailing surface on the inside corner of the finished shed, which is especially helpful for building shelves at a later date.

Headers are required above doors and windows, since these elements of a structure cannot support load. Typically, headers are made by sandwiching 1/2″ plywood between 2x material, resulting in a flush surface inside and out. In this case, Steve’s crew omitted the 1/2″ plywood because the inside will not be a finished space and does not need to be flush.

Pro-Talk: What’s 2x Material? 2x (spoken “two by”) refers to any dimension lumber that is nominally 2″ wide, such as 2x4s and 2x6s.

Understanding Header Math: Finished 2x material is actually 1.5 inches wide. Accordingly, placing two pieces of 2x side-by-side will give you 3″ of width. By sandwiching 1/2″ plywood between the boards, you achieve a 3.5″ width, which is the width of a 2×4. Depending on the distance being spanned and the load being supported, 2×6, 2×8, 2×10, or even 2×12 material may be appropriate. For the spanning distances in this shed, 2×6 header material is appropriate. For heavy loads (such as supporting a second floor), LVL [10] or steel I-Beams are used for headers.

Just like installing the joists, keeping everything square was a big focus. After each wall was built, the crew measured the diagonals and made adjustments as necessary. The picture below shows the front wall after they finished framing. You can see the headers above the windows and door.

The other three walls were framed with studs placed 16″ o.c. without any other components.

Pro-Tip: A utility bar (like the Stanely FatMax Xtreme) is a useful tool for bending and torquing boards into place.

Step 6: Install SmartSide Panels

After each wall was framed, Steve’s crew installed SmartSide engineered panels. These panels are already primed, and they will be painted to match the house at a later date. These panels are a durable and relatively inexpensive alternative to other siding materials, such as vinyl siding.

The crew stapled the panels (rather than nailing them), because stapling provides a better hold.

Each piece overlaps the adjacent piece, and the top and the bottom of the panel extends beyond the wall to cover the top plate (above) and the band board (below).

In this picture, you can see the crew checking the spacing with a spare piece of 2×4.

Step 7: Frame the Hip Roof

This shed features a hip roof, which matches the roof on the existing home. Hip roofs are much more interesting than the more typical gable roof, and they are also much more complicated to build. Here’s a quick video describing the challenges of building a hip roof.

Fun Fact: Hip roofs experience lower wind resistance than gable roofs because each side is sloped.

Hip Roof Nomenclature

Hip roof terminology can be a little confusing, so I’ve put together this rough diagram showing the different components of a hip roof from above.

  • Ridge rafter
  • Common rafters
  • Hip rafters
  • Creeper rafters (also called Jack rafters)
  • Top plate

The difficulty in building a hip roof lies in making all the required compound cuts. Steve explains a bit more about that in this video.

Build the Hip Roof

Rather than framing the walls and building the hip roof on top of the structure, Steve elected to frame the roof on the ground. It’s a trade-off, because while it’s easier to frame the roof on the ground, it can be challenging to get the roof in place afterward. This method is only possible when the crew is careful to keep the subfloor, walls, and roof perfectly square. Otherwise, the structure will be skewed and the roof will be misaligned.

As Steve mentioned in the video, he began cutting the rafters while the other crew members worked on the walls. This roof features a 7:12 pitch, and Steve used a roofing square (speed square) to mark accurate angles.

The toughest rafters to cut are hip rafters, because they butt against two adjacent common rafters.

In this picture, the hip rafters are the ones with lines marked across their width. The other three rafters are common rafters. All hip and common rafters meet at the ridge rafter.

All the rafters have a notch called a birdsmouth seat that allows the rafter to sit flat against the top plate.

Steve’s crew began building the top plate around the perimeter of the shed, and they marked the locations of the rafters. In order to make this top plate the proper size, they laid it out over the foundation floor.

The crew setup a temporary support for the ridge rafter, and started by securing the six common rafters.

They space the rafters 24″ o.c, which provides sufficient support for the roof.

This is a closeup of the birdsmouth. The small spacer accounts for the gap required to accommodate the siding. You can also see the 6″ overhang, and that they cut the tail end of the rafter for the soffits.

Next, the crew moved on to the hip rafters. You can see how the birdsmouth sits at the corner of the roof.

Lastly, they installed eight creeper rafters.

The final step for the hip roof was to attach the fascia board to the ends of the rafters. The crew ripped the edge to match the slope of the roof.

Here’s what the framed hip roof looked like before the crew slid it on top of the walls. You can also see they added a couple of collar ties that span between the common rafters to prevent the roof from shifting while it’s being moved.

Step 8: Raise the Walls

Now that the roof is ready to go, the crew needs to raise the walls. Since they had already framed the walls and attached the plywood siding, it is an easy task to set the walls in place, check for level, and nail them to the floor.

After getting this first wall setup, the crew nails a temporary support to the floor and wall, keeping it level while they continued with the other walls.

Here’s a great picture showing how the plywood siding overlaps the band board. It will also overlap the top-plate when the roof is moved into place.

You can see how including the (optional) third king stud provides a nailing surface in the corner. This is usually done for the benefit of drywall; however, Steve includes the extra stud to make it easier for the homeowner to build shelves.

The double band-board construction from Step 1 allowed Steve’s crew to stagger their nails and better secure the walls to the subfloor.

Step 9: Move the Roof in Place

To slide the roof on top of the frame, the crew setup a slanted support and some temporary blocks to protect the plywood siding. With a person at each corner, they walked the roof over and set the first edge on top of the walls. Two guys moved onto ladders, and they continued to slide the roof along the wall framing. The final step was to remove the temporary blocks. It’s a testament to Steve Wartman and his crew’s precision, because everything fit perfectly.

Step 10: Roof Sheathing and Tar Paper

The crew drove nails through the top plate, and drove 8″ Timberloks through the rafters into the wall framing to secure the roof. Next, they began laying 5/8″ OSB. If you remember, Steve mentioned that some contractors will use 1/2″ OSB, but he has found that over time it’ll start to sag. Accordingly, he prefers 5/8″ OSB for better rigidity. The two sides of the OSB sheathing are not the same, and if you look closely, you’ll see “This Side Down” printed on one side. The difference between the sides is that the top side is textured and easier to walk on.

The roof framing is 24″ oc, and Steve likes to use sheathing clips between the rows of OSB for increased support.

In this picture, Steve trims excess OSB along one of the hip rafters.

The ridge vent will sit at the peak, so the crew cuts a small gap in the OSB.

After the OSB is in place, they cover it with tar paper, starting at the bottom, and overlapping each row approximately 6″ all the way up the roof.

The crew used staples to secure the tar paper in place.

Step 11: Install the Soffit, Drip Edge and Fascia

In this design, a ridge vent and vented soffits allow air to move through the shed. This prevents moisture from becoming trapped. A properly installed fascia and drip edge prevent rain and water from moving inside. Here’s Steve with more details about these components.

Video Summary: Steve screwed the F-channel to the wall of the shed and then nailed the soffit to the underside of the fascia board.

Next, the crew mounted the drip edge (pictured below) and slid the fascia in place, securing both with small aluminum nails.

Step 12: Hang the Windows and Door

The front of this shed will have a double door with windows on each side. The openings for these components were framed out with the walls and then concealed by the plywood siding.

Using a Milwaukee Sawzall and Flush Cut Blade, the crew removed the excess siding and bottom plate.

They leveled out the window and nailed the windows around the frame.

Next, they framed out the windows and door frame with PVC board, including an angled threshold to direct water outside. They also added PVC to the corners of the shed to seal them. All of the PVC is secured with finish nails and caulked.

The crew installed a solid wood double door, which required trimming the bottom to fit the opening, cutting a chamfered edge where the doors meet, routing a space for the hinges, and shimming the doors level.

The crew installed a Kwikset door knob on the right door and a matching knob and two latches on the left door.

Step 13: Shingle the Roof

The last step before finishing the shed is to shingle the roof. Steve’s crew will install architectural shingles because they have a longer lifespan and better durability. Eventually, the house will be re-shingled to match the shed. This guide doesn’t fully cover how to shingle a roof. Until we cover that in greater detail, here’s another online resource [11] that provides solid instructions for shingling.

The cut row of shingles is actually three-tab, and all the caps are cut from three tab as well.

The crew snaps chalk lines to ensure each row is straight.

They also apply Protecto Wrap under the shingles at each corner to ensure the corners are completely waterproof.

This picture shows Steve using a utility knife with a hook blade to cut shingles. These knives make working with shingles much easier and are safer than traditional razor blades.

Taking care to keep each row even and straight, the crew progresses up to the ridge vent, adding caps along the hip rafters.

The crew cuts the vent to size and nails it in place, covering exposed nail holes with roof sealant.

With the ridge vent installed, the shed is complete!

The Finished Shed

The homeowner is really pleased with the results. We think the shed looks great!

The Cost to Build This Shed

Many of you have asked how much it costs to “stick-build” a shed versus the cost of purchasing a pre-fab kit, or having a complete shed delivered on site. Steve was very kind and put together a detailed price list that he used as part of bidding this job. All numbers are factual, utilizing a reputable shed company found here in the mid-Atlantic area for comparison.

When you’re reviewing these numbers, there are several factors to keep in mind. First, the shed that Steve and his crew built included a lot of features that are considered upgrades, for which a shed company will charge extra. These upgrades are things like the ridge vent, double-hung windows, 6-panel doors, SmartSide siding, and a hip roof, and more. The second thing to remember is that the Stick Built Shed price is for materials only. A quality contractor like Steve will charge an additional $2500+ for labor. You can see that hiring out a shed build isn’t the cheapest option; however, a contractor can still be very competitive.


Article printed from One Project Closer: http://www.oneprojectcloser.com

URL to article: http://www.oneprojectcloser.com/how-to-build-a-shed/

URLs in this post:

[1] Project Guides: http://www.oneprojectcloser.com/topics/project-guides/

[2] subscribe to our feed: http://feeds.feedburner.com/OneProjectCloser?format=xml

[3] Steve Wartman: http://www.oneprojectcloser.com/meet-the-pros/

[4] building a deck: http://www.oneprojectcloser.com/how-to-build-freestanding-deck/

[5] installing drywall: http://www.oneprojectcloser.com/how-to-install-drywall-hanging-taping-finishing/

[6] video of a typical pre-built shed delivery: http://www.oneprojectcloser.com/video-prefabricated-shed-delivery-on-truck-trailer/

[7] How to Pour a Solid Concrete Shed Base: http://www.oneprojectcloser.com/pouring-concrete-slab-shed-base/

[8] Advantech’s Website: http://www.advantechperforms.com/advantech-advantage/moisture-resistance.aspx

[9] Installing a Plywood Subfloor in a Habitat Home: http://www.oneprojectcloser.com/install-plywood-subfloor/

[10] LVL: http://en.wikipedia.org/wiki/Laminated_veneer_lumber

[11] here’s another online resource: http://www.biytoday.com/shingling.htm

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