Flat roof double carport plans

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.

 

 

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Flat roof double carport plans

Building a flat roof double carport

Building a flat roof double carport

 

Materials

  • 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

 

Tools

 

Tips

  • Use a good miter saw to make the angle cuts
  • Drill pilot holes before inserting the screws

 

Time

  • One Week

 

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Building a flat roof double carport

Laying out the carport

Laying out the 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.

 

Building the posts

Building the posts

 

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.

 

Fitting the posts

Fitting the posts

 

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.

Smart Tip: Alternatively, you could use posts anchors. Secure the metal anchors into concrete, as to lock the wooden posts into place properly. Align everything with attention and with great care.

 

Fitting the support beams

Fitting the support beams

 

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.

 

Fitting the braces

Fitting the braces

 

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.

Smart Tip: Always plumb each post before fitting the components. After fitting the braces, install the opposite support beams.

 

Fitting the support beams

Fitting the support beams

 

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.

 

Fitting the rafters

Fitting the rafters

 

Build the rafters out of 2×6 lumber. Cut the components at the right size and smooth the edges with sandpaper.

 

Cutting the rafters

Cutting the rafters

 

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.

 

Fitting the rafters

Fitting the rafters

 

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.

 

Fitting the rim rafters

Fitting the rim rafters

 

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.

 

Fitting the roofing sheets

Fitting the roofing sheets

 

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.

 

Fitting the roofing

Fitting the roofing

 

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.

Smart Tip: Start the first course with a 3-tab shingle, the second course with a  2 1/2 tab, the third course with a 2 tab, the forth course with a 1 1/2 tab, the fifth course with a 1 tab, the sixth course with a 1/2 tab. Repeat the process from the beginning, starting with the seventh course. Don’t forget that the shingles should overhang from the drip edge about a 1/4″. In addition, secure the asphalt shingles to the roof decking with tacks.

 

Flat roof carport plans

Flat roof carport plans

 

The flat roof carport has a neat appearance so that it can match the style of any home.

 

Flat roof carport plans

Flat roof carport plans

 

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.

Smart Ttip: Apply several coats of stain or paint to the wooden components, if you want to protect them from decay and to enhance the look of the flat roof double carport.

 

 

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