Consider openings for stairs when determining the actual placement of columns. You will typically need one on each side of the stairs. As a rule of thumb, try to use an odd number of columns; it's more aesthetically pleasing to the eye.
Check with your codes department to ensure you set the right amount based on the width and type of roof being constructed when building a porch roof. NOTE: Everything outlined above pertains to decks and patios also. However, you may have to make a few adjustments:. Care must be taken at every step to ensure all columns, beams, headers, etc. Decks: You still need to attach columns to the beam under your deck. Depending on how your deck was constructed you may need to reinforce the beam to carry the column and roof.
Check local code requirements. Patios: For patios, attached your column anchors to the concrete with the appropriate fasteners. There are several different types on the market and your local home supply store should be able to assist. If you have other than a poured concrete patio, you should review our porch foundation section. Before installing columns, be sure you've selected the right column design for your porch. Check out our columns section to learn more about them. Place a column in the anchor on one end of the decking, plumb, and secure properly.
You may need to brace the column while you continue. On this building a porch roof project, a beam is placed against the ledger board and fastened to the top of the end column. Plumb and square the column. Brace as necessary. This board may not be required in your situation.
If you don't have a ledger board, you will need to create blocking to accept the beam. Use the same procedure for installing a rafter board above. Repeat this on the other end as well. I've seen and done this several different ways. One is to anchor and brace all of the columns. Another is to anchor and brace the outside columns and then anchor the header on each end.
It depends on the length and height of your roof. When building a porch roof, an important goal to have is to make sure the columns are square to the house and the floor. On this particular project, we reused the old header and due to it's length, installed it on columns in sections as depicted below. You will normally build a header out of 2x6 or 2x8 planks. When building a porch roof, the header carries most of the weight of the roof. Ensure that it is substantial. Place the header on top of the columns and secure by toe nailing.
Continue this process the length of the porch. Before you install the rafters you will have to make special cuts called "tails" and "bird mouths". These notches are designed to fit against the rafter board and over the header. You will need a rafter square in order to lay out the cuts on the boards. Building a porch roof requires accurate measurements.
Although not difficult, laying out the cuts to fit precisely requires practice and skill. For this building a porch roof project, we needed to provide nailing support for siding and to enclose the ends. We did this by installing jack studs and plywood on each end of the roof. A fascia board is installed on the rafter tails.
Gutters will be attached to this later. Although we did not use them on this porch roof, you could install "lookouts" that attach to the end of the rafter tail and the header. These provide a flat surface on which to nail the soffits. Once completed, roofing paper will be installed. Then attach drip edge over the roofing paper. When building a porch roof, asphalt shingles or other roofing material are then attached over the roofing paper and drip edge.
An Often Asked Question We are often asked how to integrate a new porch roof's shingles with those on an existing home if the roof line is extended over the porch.
As you can see in the picture above, now is the time to install your electrical wiring for lights, fans, and receptacles according to your plan. Planning to install outdoor ceiling fans now or in the future. Now's the time to add additional blocking to support the fans!
TIP: If building a porch roof or any roof in snow country you should consider using an ice and water barrier along the edge of the roof line. House Sheathing 5. Gutter 6. Roof Sheathing 7. Drip Edge Cap 8. Asphalt Shingles 9. Roof Felt Most builders use 3-tab asphalt shingles that match the house shingles for porches.
Snap a vertical chalk line down the center of the roof and start at the bottom. You want to trim the tabs off the shingles to create a starter course. The roof of the house has to be quite stable and strong. Deformations and rotting make the roof unsecure, so that will be quite difficult to attach a porch roof without causing damage to all house. So you have to repair all the damages and apply anti-rot roof covering agents to the house top.
Ensure that your porch is leveled. If no, you will have to flatten it by repairing the areas which are below the level. In opposite case, you are risking to get an unstable and distorted porch roof. Check if there are no external lines of communication, such as phone wires, power, and TV-cables, etc.
If there are some, you have to lay them in the way that all the cables are hidden. Nearby trees can also make attaching the roof quite difficult. If so, you have to cut down the branches that can disrupt roof construction process. Calculate rise and run it is quite a simple task if you use the special online calculator to determine pitch roof slope and cut the rafter to the proper length.
Think of the size of a fascia board, beams and support columns beforehand. Also read: How to calculate roof pitch. On your plan mark the places where you plan to install the support posts. It is recommend locating one column at each end as a minimum; the larger your porch roof is, the more columns you need to support it securely. Install a post every feet. Do not forget to put a column at each side of the stair opening. Note that even number of the support posts, located symmetrically, look much better than an odd number of the columns.
Drawing up the plan, you have to consider the placement of the porch roof towards your second-floor windows. It is strictly recommended to leave at least inches below the window sills. Take into account the electrical requirements for the lights you are planning to install. There are different kinds of roof designs, such as cat slide, flat, gambrel or gable porch roof. Choosing between them, remember that the porch roof has to fit in the existing design and color scheme and complement the architectural style of the house.
Additionally, you can use decorative posts to make your porch look classy. As for the roofing material, you have to make the decision basing on your rise and run calculations. With the unit rise 3 or less you have to use asphalt shingles to cover the roof. If the roof is 4 or more, you can use almost any materials, such as cedar shakes, galvanized metal, timber and ceramic tile, asphalt shingles, slate, etc.
Note, that you also can lower the ceiling or raise the porch to enlarge unit rise and get more roof covering options.
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