10×12 Greenhouse Shed Roof Plans

This step by step diy project is about diy 10×12 greenhouse shed roof plans. This is PART 2 of the saltbox greenhouse shed project, where I show you how to build the roof. From cutting to the rafters to installing the roofing, I’ve got you covered with all the info you need  to know. Take a look over the rest of my woodworking plans, if you want to get more building inspiration.

When buying the lumber, you should select the planks with great care, making sure they are straight and without any visible flaws (cracks, knots, twists, decay). Investing in cedar or other weather resistant lumber is a good idea, as it will pay off on the long run. Use a spirit level to plumb and align the components, before inserting the galvanized screws, otherwise the project won’t have a symmetrical look. If you have all the materials and tools required for the project, you could get the job done in about a day. See all my Premium Plans HERE.

Projects made from these plans

Building a saltbox shed roof

Building-a-greenhouse-shed

Cut & Shopping Lists

• I – 2 pieces of 2×4 lumber – 67″ long, 2 pieces – 19 1/4″ long, 1 piece of 2×6 lumber – 144″ long TOP RIDGE
• J – 9 pieces of 2×6 lumber – 110 3/4″ long, 9 pieces – 72″long RAFTERS
• K – 2 pieces of T1-11 siding – 48″x91 3/4″ long, 2 pieces – 24″x84″ long, 2 pieces – 48″x84″ long, 2 pieces – 33 1/4″x48 long, 1 piece – 20 1/4″x24″ long SIDING
• L – 1 piece of 3/4″ plywood – 48″x48″ long, 3 pieces – 48″x96″ long, 1 piece – 25″x48″ long, 1 piece – 25″x96″ long, 1 piece – 36″x48″  long, 1 piece – 13 1/4″ long, 1 piece – 13 1/4″x96″ long ROOF
• L – 12 pieces of 2×5 lumber – 22 1/2″ long SUPPORTS
• L – 2 pieces of 1×8 lumber – 74 1/4″ long, 2 pieces – 110 3/4″ long TRIMS
• M – 200 sq ft of tar paper, 200 sq ft of asphalt shingles ROOFING

• 9 pieces of 2×6 lumber – 10′
• 9 pieces of 2×6 lumber – 6′
• 1 piece of 2×6 lumber – 12′
• 3 pieces of 2×4 lumber – 8′
• 6 pieces of 3/4″ plywood – 48″x96″
• 5 pieces of T1-11 – 48″x96″
• 7 pieces of 1×8 lumber – 10′
• 200 sq ft of tar paper, 200 sq ft of asphalt shingles
• ties
• polycarbonate sheets
• 8d nails, 2 1/2″ screws, 3 1/2″ screws
• wood filler , wood glue, stain/paint

Tools

 Hammer, Tape measure, Framing square, Level

 Miter saw, Drill machinery, Screwdriver, Sander

 Safety Gloves, Safety Glasses

Time

 One day

Related

• PART 1: 10×12 Greenhouse Shed Plans
• PART 2: 10×12 Greenhouse Shed Roof Plans
• PART 3: 10×12 Greenhouse Shed door and Trims Plans

10×12 Greenhouse Shed Roof Plans

Double to plates

First of all you need to fit the 2×4 double plates to the front and back walls. Align the components with attention and insert 2 1/2 screws to lock them into place tightly.

Fitting the ridge beam

Continue the project by attaching the top ridge to the shed. Drill pocket holes at both ends of the supports and insert 2 1/2″ screws to lock them into place tightly. Use a spirit level to plumb the supports vertically. Install the 2×6 top ridge to the top of the supports. Make sure the corners are square and align the edges flush.

Side-wall-frame

Next, build the rafters for the greenhouse shed from 2×6 lumber. Make the angle cuts to one end of the rafters, as shown in the image.

Rafter extra cuts

Make small birdsmouth cuts to the top of the rafters, so you can fit them to the top ridge in a professional manner. Smooth the edges with attention.

Fitting-the-rafters

Fit the rafters to the top of the shed and place them equally spaced, as shown in the diagram. Use rafter ties to secure the rafters into place tightly. Place the rafters every 24″ on center for a professional result.

Fitting the gable end supports

Fit  a 2×4 support to the front and back of the shed. Drill pocket holes at both ends of the supports and insert 2 1/2″ screws to lock them into place.

Front Wall Siding

Cut the T1-11 siding sheets to shape and size and then attach them to the front of the shed greenhouse. Use 6-8d nails to secure the panels into place, every 8″ along the framing.

Siding sheets – Back

Cut the siding sheets to size and and attach them to the back of the shed, as well.

Fitting the glass supports

The next step of the project is to fit the 2×4 supports to the roof of the saltbox greenhouse. The supports will hold the poly carbonate sheets.

Roof Sheets

Cut the roof sheets from 3/4″ plywood. Mark the cut lines on the sheets and then adjust them to the right size and shape. Lay the sheets to the top of the greenhouse shed and lock them into place every 8″ with 1 5/8″ screws. Leave no gaps between the sheets for a professional result.

Roof Sheets – Part 2

Fit the rest of the plywood sheets to the greenhouse shed. Leave no gaps between the sheets for a professional result.

Fitting the overhangs

Fit rafters to the front and back of the shed, so you create some small overhangs. Align the edges with attention, drill pilot holes and insert 3 1/2″ screws to lock them into place tightly.

Front and back roof trims

Build the trims for the front and back of the greenhouse shed from 1×8 lumber. Make the cuts and then smooth the edges with sandpaper.

Front and back front trims

Attach the trims to the front and to the back of the shed. Use 2″ brad nails to secure the trims into place tightly.

Side trims

Fit the side trims to the sides, as well. Use 2″ brad nails to lock the 1×8 trims into place tightly.

Fitting the glass sheets

Fit the polycarbonate sheets to the top of the greenhouse shed. Secure the sheets into place according to the manufacturer’s instructions.

Fitting the roofing

Cover the roof of the shed with roofing felt, making sure the strips overlap at least 2″. Secure the tar paper to the plywood sheets with roofing staples. In addition, cut a large piece for the top ridge. Fit the side drip edges over the roofing felt, while the bottom drip edges should be fit under.

Read the instructions labeled on the asphalt shingle packs before installing them into place tightly. Start with the bottom left side of the roof and install them all the way to the top.

Greenhouse Shed Plans – Back view

This is one of a kind outdoor project, where I show you how to build a greenhouse shed. If you like flowers and other plants, this shed will protect them from the bad weather.

There will be plenty of light inside the shed. You can build benches so you can use the space at maximum.

This woodworking project was about 10×12 greenhouse shed roof plans free. If you want to see more outdoor plans, check out the rest of our step by step projects and follow the instructions to obtain a professional result.

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