Best Methods of Attaching a Roof to an Existing Roof

Making a dream house isn’t a one-night project, especially if you’re out of cash while trying to embody that dream. Even installing a new roof can be a source of fun as it can beautify your house. If you have a plan of attaching a roof to an existing roof, this article will inform you of the know-how.

How to Add a Porch Roof to an Existing Roof

Planning to add a porch to your yard? Make sure to install a porch roof as well. Otherwise, you may have to deal with the hot scorching sun or drenching rain.

attaching a roof to an existing roof

To add a porch roof, make sure you know first how the roof pitch will look. In general, people tend to pick an inclined patio roof to avoid water pooling when it rains. With this in mind, you will be forced to measure the clearance height as well.

After you determine the clearance height, here’s what you should do next:

  1. If you plan to place the additional roof on the existing roof, then you should consider whether to remove the eaves or not. If you plan to place it under the existing roof, you can skip this procedure.
  1. Pick and determine how many beams, roofing planks, and rafters you will need for your roof.
  1. If needed, you can stain your wood pieces with protective paints before installing them.
  1. If you plan to place a pillar on your patio roof, work on it first after considering the patio’s height. Make sure to make it perpendicular to the ground.
  1. Install the roofing. Starting from the joist, rafter, and later the beams and planks. Consider adding eaves while installing it.
  1. Now, it’s time to apply the roofing felt to protect the roof’s inner side from moisture and such.
  1. Lastly, shingles on top of the underlayment – the outer side of the roof is done.
  1. Cover the inner roof side (the ceiling’s side) with plywood, plasterboard, or anything. Apply some paint to beautify.

How to Join Two Roofs Together?

  1. Preparing the area. Clean the affected area from any debris, including removing the shingles and underlayment that cover the roof. No need to remove it all. Make it to the extent of around 6 inches from the edge of every pitch.
  1. Measure the joint area. Make sure to include the 6 inches edge into the counting.
  1. Prepare the flashing joint. Then, according to the size you have obtained, cut the flashing material with metal snips.
  1. Place the flashing material at the meeting point. Start by placing it from the higher joint area first.  Remember to slip the flashing material to the roof pitch as well.
  1. Bend the joint with the help of lumber to make the shape suitable for the slope. Take away the lumber after you finish making the bend.
  1. Seal the flashing edges afterward. Prepare two pieces of 1×1 inch lumber and cut it with the length of the flashing itself. Then, slip each lumber piece under the roof pitch to align well to the roof edge. Apply a bead of sealant material along the top and bottom of the lumber piece.
  1. Next, secure the flashing with metal screws with 6-inch spacing between each screw.
  1. Make the flashing cut-edge neat. Then, cover the flashing with shingles similarly looking with the surrounding shingles.

Adding a Gable Roof to an Existing Roof

Attaching a roof to an existing roof, especially a gable one to another existing roof, requires a long process. However, the basic is actually similar to attaching a porch roof to the existing one. It may be troublesome for some people; hence hiring a team will be much advised.

If you decide to attach the gable roof yourself, make sure you learn to attach a roof to an existing roof how-to. That way, you have a certain guideline of how to do it. Having someone to accompany you will be much better than doing it all alone.

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RoofLast is an experienced author and roofing expert. With years of practical experience in the field authored several informative articles on various aspects of roofing, including installation, maintenance, and repair