This step by step diy woodworking project is about flat roof double carport plans. If you want to learn how to build a double car carport with a flat roof, we recommend you to pay attention to the instructions described in the article and to check out the related projects. There are many storage projects featured on our site, so don’t be afraid to browse through the rest of the woodworking plans.
Before starting the actual construction project, we recommend you to plan everything, as to save money and to keep the costs under control. Adjust the size and the design of the wooden carport to suit your needs. In addition, we recommend you to invest in high-quality materials, such as pine, redwood or cedar, as they have a nice finish and are highly durable, especially in a humid environment.
It is essential to invest in high quality materials, that are also water-resistant, such as pressure-treated lumber. Cut the components at the right size by using a circular saw and smooth the cut edges with a sand block. Don’t forget to ask a skilled friend to assist you during the project, especially if you don’t have a large expertise in the field. You need someone to hold the components into place, while you drive the screws in.
Made from this plan
Flat roof double carport plans
- A – 2 pieces of 4×4 lumber – 132″ long, 2 pieces – 140 1/4″ long, 2 pieces – 148 1/2″ long POSTS
- B – 2 piece of 4×4 lumber – 42 1/2″ long, 2 pieces – 47 1/2″ long, 2 pieces – 55″ long, 2 pieces – 59″ long BRACES
- C – 4 pieces of 2×6 lumber – 265 3/4″ long SUPPORT BEAMS
- D – 12 piece of 2×6 lumber – 243″ long RAFTERS
- D – 2 piece of 2×6 lumber – 246″ long, 2 pieces – 265 3/4″ long RIM RAFTERS
- E – 10 pieces of 3/4″ plywood – 48″x96″ long, 5 pieces – 48″x73 3/4″ long, 2 pieces – 3″x96″ long, 1 piece – 3″x73 3/4″ long ROOFING SHEETS
- F – 600 sq ft tar paper, 600 sq ft asphalt shingles ROOFING
- post anchor, tube form, concrete
- 2 1/2″ screws, 5 1/2″ carriage bolt, rafter ties
- roofing felt, asphalt shingles
- Safety gloves, glasses
- Miter saw, jigsaw
- Chalk line, tape measure, spirit level, carpentry pencil
- Drill machinery and drill bits
- Use a good miter saw to make the angle cuts
- Drill pilot holes before inserting the screws
- One Week
Building a flat roof double carport
The first step of the woodworking project is to lay out the carport in a professional manner. Therefore, we recommend you to use batter boards and string to make sure the posts will be properly placed. Apply the 3-4-5 rule to each corner of the layout in order to check if they are perfectly square. In addition, make sure the diagonals are perfectly equal before setting the posts into place.
Next, you need to cut the posts at the right size, making sure you need to fit them about 3′ into the ground, before adjusting their dimensions.
Setting the posts in concrete is essential for the rigidity of the carport. As you can easily notice in the diagram, we recommend you to dig 3′ deep holes and to pour 2″ gravel on the bottom. Install the tube forms to the holes. Secure the posts with braces before filling the forms with concrete.
Next, install the 2×6 support beams to the top of the posts. Use clamps to secure the beams to the top of the posts. Drill pilot holes through both the support beams and through the posts before inserting the 7-8″ carriage bolts. Leave no gaps between the components and lock the components together tightly. Make sure the carport has appropriate overhangs, in order to allow the water to drain properly.
If you live in a windy area, you should install 4×4 braces to the flat roof carport. Cut both ends of the braces at 45 degrees and secure them to the structure, as described in the diagram. Drill pilot holes before inserting the screws and leave no gaps between the components, for a professional result.
Install the support beams to the other side of the carport, using the same techniques described above. It is essential to make sure the beams are at the same level, otherwise the roof won’t be level.
Build the rafters out of 2×6 lumber. Cut the components at the right size and smooth the edges with sandpaper.
Make notches at both ends of the rafters, using the information from the diagram. Make parallel cuts inside the marked area and remove the excess material with a chisel. Smooth the cut edges with fine-grit sandpaper and remove the residues with a damp cloth.
Place the rafters equally-spaced and and secure them to the support beams using 4 1/2″ screws. Align the rafters at both ends before inserting the screws, to get a professional result.
One of the last steps of the project, is to fit the 2×6 trims to the exterior of the rafters. The top edge of the rim rafters should be 3/4″ over the rafters, in order to get a professional result. Secure the trims to the frame of the carport using 2 1/2″ screws, every 8″. Use a spirit level to make sure the bottom and the top trims are horizontal.
Build the roof out of 3/4″ plywood sheets and lay them to the rafters, as described in the diagram. Align the sheets at both ends and lock them to the rafters with 1 1/2″ nails or screws, every 6-8″. It is essential to close the gaps between the sheets, if you want to get the job done as a professional. Make sure the surface is even and the screws are not protruding.
You could fit asphalt shingles to protect the carport, as it is a straight forward solution. Therefore, install roofing felt over the roofing sheets, making sure the strips overlap at least 2″. Secure the tar paper to the plywood sheets with roofing staples. Fit the side drip edges over the roofing felt, while the bottom drip edges should be fit under. Place a starting course at the bottom of the roof, before installing the asphalt shingles. Always read the manufacturing instructions before starting the installation, as there are several aspects that differ.
The flat roof carport has a neat appearance so that it can match the style of any home.
Last but not least, we recommend you to take care of the finishing touches. Fill the holes with wood filler and let it to dry out for several hours. Check out the rest of the outdoor projects, to see more ways to improve the look of your garden.
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