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Woodworking Planshow to Woodworking Plans for Our latest shed is also a pavilion—and you can build it, too!

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Home Garden Structures

Add an enclosed screen porch to your house using basic framing and deck building techniques.

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Introduction

You can add a spacious, airy outdoor porch to your home. We''s line
  • Miter saw
  • Reciprocating saw
  • Safety glasses
  • Scaffolding will make it easier to complete the roof work
  • Socket/ratchet set
  • Speed square
  • Stapler
  • Stepladder
  • Table saw
  • Tape measure
  • Tin snips
  • Tool belt
  • Utility knife
  • Roll up your sleeves!

    Woodworking Planshow to Woodworking Plans for A screened in porch is a big improvement, but building a porch is also a big project, one that might consume most of your spare time this summer. So, we’re keeping this how to build a porch design simple.

    Woodworking Planshow to Woodworking Plans for Simple 2×4 wall construction.

    You can build it with standard dimensional lumber, and it doesn’t require heavy beams or complex joints. The simple 2×4 walls are light and airy looking. Two horizontal bands of 2x4s set 10 in. from the top and bottom of the wall, add a design element and stiffen the 2×4 framing enough to support the hand-built trusses.

    With this how to build a porch design, there’s no need to precisely align the overhangs. And the exposed rafters and open soffit look great on many house styles. Plus, to create the optimal relaxation spot for your porch, try out these 10 tips.

     

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    The total cost of this how to build a porch was $6,500, but you could save hundreds of dollars without sacrificing quality by substituting treated decking for the cedar or using tongue-and-groove pine rather than cedar on the ceiling.

    Straight forward construction.

    Even though how to build a porch project is a large project, most of the construction is straightforward. If you’ve built decks or sheds, you’ll be able to tackle this job with confidence. In this how to build a screened in porch article, we’ll show you the key steps for building this porch. Study the drawings and photos for more details.

     

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    The tools you’ll need:

    Woodworking Planshow to Woodworking Plans for The screened porch offers a nearly unobstructed view of the outdoors and you’ll need a full set of basic carpentry tools, a circular saw and a drill to build this porch. In addition, a reciprocating saw, a table saw and a power miter box will make the job go quicker and give you better results. To reach high places safely and easily, we recommend renting a rolling scaffold system for a month.

    Project step-by-step (21)

    Step 1

    Plan ahead to avoid construction headaches

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    You can add this screened in porch to almost any house, but attachment details may vary from what we show here.

    • On most two-story houses, you won''re not sure how to neatly join the screened in porch and house roofs:

      • We recommend hiring an architect to help work out the details.
      • Another option is to build a full-size mockup of a roof truss out of inexpensive and lightweight 1x4s. Figure out where the top of the wall plate would be if you built the porch according to our plans (Figures A – H). Then support the mocked-up truss at this height to see how the porch overhang meets the roof.
      • If you don''s required to obtain a building permit.
      • Start this process at least a month before you plan to build. This will allow enough time to work through potential problems.

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    Step 3

    Build the deck square and level and assemble the perimeter joists

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    Woodworking Planshow to Woodworking Plans for Install the ledger board.

    Woodworking Planshow to Woodworking Plans for Start by marking the ledger board location on the house wall. We located the top of the ledger board 90 in. below the bottom of the soffit. On our house, this left a 6-in. step down from the patio door to the deck surface. Remove the siding and attach the ledger with 1/2 x 4-in. galvanized lag screws (Figure D). Make sure it''ve been inspected. Let the concrete set overnight.

    Assemble Frame.

    Next, choose the six straightest 2x10s for the perimeter beams. Cut the 2x10s for the two side beams to length and nail the pairs together. Use 16d stainless steel or double-dipped galvanized nails for all of the joist framings and to attach the joist hangers to the ledger board. Rest one end of each side beam in the double joist hangers and prop them up until level with a stack of wood.

    Step 4

    Install the joists and joist hangers

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    Nail through the joist hangers into the beams at the house to hold them in place. Then connect the opposite ends of the two beams at the front with a 2x10 cut to the same length as the ledger. Adjust the resulting frame until the diagonal measurements are equal.

    Then brace the frame against stakes pounded into the ground to hold it square while you install the treated posts, joists and decking. Sight along the outside rim joist occasionally and adjust the length of the joists as needed to keep the front rim joist straight.

    Step 5

    Cut away the overhang and siding to make way for the porch

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    You''{"":[[300,1050],[300,600],[300,250],[160,600]]}''{"":"","":"","":""}''ll have to cut it back flush to allow the innermost truss to fit against the wall. Start by removing the soffit and fascia boards above and several feet to each side of the deck. It''re sawing. Finally, cut off the rafter tails flush to the house wall.

    for 1 last update 2020/05/28

    Step 7

    Construct a jig to assemble the roof trusses

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    Prime Before Painting. 

    Prime and paint the truss parts, wall frame and screen stops before assembly. Prime the wood with a special stain-blocking primer such as Zinsser''s easiest to assemble the roof trusses first, using the deck platform as a work surface. Screw two sheets of plywood to the decking and use the dimensions in Figure J to chalk lines indicating the top of the rafters and the bottom of the 2x6 crosstie. Cut triangular blocks and screw them to the plywood to hold the rafters in alignment as you assemble the trusses.

    Step 8

    Build the trusses

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    Woodworking Planshow to Woodworking Plans for How to use the jig:

    Cut a rafter using the dimensions in Figure J and use it as a pattern to mark the remaining rafters. Place a pair of rafters in the jig and screw the tops together. Next screw the 2x6 crosstie and 2x8 spacer to the pair of rafters. Keep the crosstie screws clear of the bolt hole locations. Complete each truss by screwing another pair of rafters on top.

    Assemble the rafters and trusses.

    Check the ends and tops of the rafters as you assemble the trusses to make sure they''{"":[[300,1050],[300,600],[300,250],[160,600]]}''{"":"","":"","":""}''{"":[[300,250],[3,3]],"":[[320,50],[300,250],[3,3]],"":[[728,90],[640,360],[3,3],[300,250]],"":[[970,250],[970,90],[728,90],[3,3],[300,250]]}''{"":"","":"","":""}''s worth taking a little extra time to make the framing material look good. We chose the nicest cedar 2x6s we could find and ripped them into 3-1/2-in. and 1-1/2-in. boards. We did this to create sharp, clean edges (we also ripped off all the factory rounded edges).

    Cut the studs and crosspieces to length and screw the walls together (Figures F – H). We used a power miter saw for clean, square cuts, but a circular saw will work too. Use a crosspiece as a spacer when you''re straight along their top and bottom plates, perfectly plumb and square, and securely braced. Start by positioning the walls with their outside edge flush to the deck and screwing them down. Next, screw the corners together, making sure the top plates of adjacent walls are even with each other. Use a long level to plumb the walls while you attach diagonal braces to hold them in position. Leave the braces in place until after the roofing is complete.

    Woodworking Planshow to Woodworking Plans for for 1 last update 2020/05/28

    Step 11

    Attach the Trusses

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    You''ll use the 1x4 to brace and position the tops of the trusses as you stand them up). The first truss simply butts to the house wall. The outermost truss aligns with the edge of the top plate, and the three interior trusses are centered on the studs below. Set the first truss against the house and carefully center it so that 1-1/2 in. of the for 1 last update 2020/05/28 bottom 2x6 overhangs the top wall plates on each side.You''ll use the 1x4 to brace and position the tops of the trusses as you stand them up). The first truss simply butts to the house wall. The outermost truss aligns with the edge of the top plate, and the three interior trusses are centered on the studs below. Set the first truss against the house and carefully center it so that 1-1/2 in. of the bottom 2x6 overhangs the top wall plates on each side.

    Installing the first truss.

    Screw the truss to the top plates. Then use a straightedge and level to stand the truss perfectly plumb and brace it to the roof. Make sure this brace is securely screwed to the roof and the truss because the remaining trusses will be supported by this truss until the roof tie-in framing is complete.

    Install the remaining trusses. 

    Lift the remaining trusses onto the top of the walls and rest them on the first truss. Slowly and carefully slide the outermost truss to the outside end of the porch. Align the marks on the 1x4 with the truss at the house and the outermost truss and screw it to the trusses.

    Center the outermost truss on the walls and toe-screw it to the top plate of the walls. Stretch a string line between nails at the peak of the two trusses. Align the remaining trusses with the string line and the marks on the 1x4 and top plates and screw them in.

    Step 12

    Line up the tie-in framing with the porch for a seamless blend

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    One of the trickiest parts of the porch construction is joining the two roofs. The key is to extend lines from the new porch and mark where they intersect the existing roof. Do this by using a taut string the 1 last update 2020/05/28 line or a long, straight board. Remember to raise the tie-in framing on the existing house roof ¾ in. above the porch framing to compensate for the difference in thickness of the 3/4-in. plywood and 1-1/2-in. roof boards, so use 3/4-in.-thick spacer blocks to raise the line to the correct tie-in framing height.One of the trickiest parts of the porch construction is joining the two roofs. The key is to extend lines from the new porch and mark where they intersect the existing roof. Do this by using a taut string line or a long, straight board. Remember to raise the tie-in framing on the existing house roof ¾ in. above the porch framing to compensate for the difference in thickness of the 3/4-in. plywood and 1-1/2-in. roof boards, so use 3/4-in.-thick spacer blocks to raise the line to the correct tie-in framing height.

    Step 13

    Install the ridge and rafters

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    Cut the 2x8 roof plates. If you''re done installing the roof boards, snap a chalk line at the gable (outer) end and saw them off to leave an 18-in. overhang. Finish the gable end overhang by installing a pair of rafters and the 1x3 trim. Hold the gable end rafters tight to the underside of the cutoff roof boards and screw through the roof boards to hold the rafters in place. Then cut 1x3 trim to cover the end grain of the roof boards. Extend the trim around the corners and return it along the roof edge to the house.

    Step 15

    Pay attention to flashing and roofing details for a watertight job

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    Building the tie-in framing on top of the existing shingles is a good way to keep the house waterproof as you construct the porch, but when it comes time to install the roofing you''t go into roofing details here (so check out our expert guide for how to roof a house). In general, cover the eaves and valley with strips of a waterproof membrane (an ice-and-water barrier) and install the sheet metal valley. Place roofing nails about 12 in. apart along the edge of the metal valley. Cut a short piece of valley metal to complete the top on each side, overlapping it about 6 in. onto the long piece.

    Staple No. 15 building paper to the remainder of the porch roof, starting at the bottom and working up. Overlap each row 3 in. onto the one below. Install shingles to match the house. Follow the manufacturer''{"":[[300,1050],[300,600],[300,250],[160,600]]}''{"":"","":"","":""}''{"":[[300,250],[3,3]],"":[[320,50],[300,250],[3,3]],"":[[728,90],[640,360],[3,3],[300,250]],"":[[970,250],[970,90],[728,90],[3,3],[300,250]]}''{"":"","":"","":""}''re too steep for a miter saw unless you build a special jig.

    Step 18

    Attach trim and sill to the outer walls

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    Nail a 2x10 trim board over the outside joist, 1-1/2 in. below the top surface of the deck. Cut a 2x4 sill piece to width and bevel the top on a table saw. Miter the ends and nail the sill to the top of the 2x10 trim board.

     

     

     

    Step 19

    Trim corner details

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    This illustration shows how the corners are assembled and the trim is installed.

    Step 20

    Staple the screen to the walls

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    The charcoal aluminum screening we used is strong and long-lasting, but you have to handle it carefully to avoid creases and dents. Carefully unroll the screen on a large work surface and cut lengths about 3 in. longer than you need. Reroll each piece and carry it to its location.

    Start by tacking the two corners, making sure the screen is square to the opening. Then stretch the screen slightly and staple the sides, top and bottom. Place 1/4-in. staples every 3 in.

    Step 21

    Attach 2x2s over the framing

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    After you stretch and staple each section, cut off the excess screen with a sharp utility knife. Then cover the edges with 2x2 trim pieces. We screwed these on to allow for easy removal for future screen repairs, and the trim covers the staples along all of the edges. Frame and screen the outer gable end following Figure C.

    Screen door details:

    If you use a wood door like ours, start by trimming it just enough to fit in the opening. Then set it in place and mark the door for final fitting. Use a sharp plane or belt sander to trim the door. You may have to repeat this process a few times to get a good fit.

    Nail 1/2 x 2-in. wood stops to the framing at the door opening. Then hang the door using galvanized or brass screen door hinges. Mount a latch and door closer to complete the job. Plus, check out these other 10 inviting screen porches, rooms and lanais.

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