I came up with 291 11/16 for the back and 267 15/16 for the front, giving me a difference of 23 3/4". 5:45 Boolean union two roof planes. Save my name, email, and website in this browser for the next time I comment. Then add and trim the siding into the second roofs end. Ask the community or share your knowledge. I can then make recommendations on the panel you need for the new roof, and how to join the new and the old. how to join two gable roofs together - albertawater.com If youre unsure about how much your roofs can differ in rise without compromising structural integrity then consult an expert. Next, you can place the flashing on the meeting point between the pitches of the roofs. As I look at the elevation drawing, I would say this is a case of a design that was not fully thought through in the design phase and is likely (though I do not have all of the information to say for certain) the fault of the designer. For the porch area, sketch it but don't define a slope. 4:49 Move to be coplanar with another roof plane. To tie both roofs together, brace the upright and draw chalk guidelines on the shingles to mark the centerline of roof valleys, where they both will connect. Model them as two separate roofs and use walls to fill in the gap. So, hiring a roofer is still worth it to do. . If you want to know about the definition, it is the steepness of the roof. The height diffence is too small to use soakers and flashings. The same roof has a 4/12or 1/3pitch. What design drawings were created for the permitting process, and what do they show? Next, you have to take care of the flashing to create a more attractive look. Here, you must choose the highest one instead of the lower one. The valleys can be placed either at the top or bottom of each section so that they overlap with one another. However, some roofs will require metal flashing if they are unable to support the weight of this type of material. These cookies ensure basic functionalities and security features of the website, anonymously. 9 Practical Steps about Joining Two Roofs with Different Pitches Joining these two roofs poses two main challenges: One is getting the two differently pitched planes to meet at the hip (or valley) rafter. With either copper or lead, you can do it with one piece by folding the sheet onto itself creating a z-fold yielding a triple layer. This will require some measuring beforehand! The gable roof line tool creates similar but slightly different problems. It is the wisest decision that can prevent you from using a way lot more money in the future. This cookie is set by GDPR Cookie Consent plugin. The last but not least step that you must follow is using shingles that have the exact same appearance with the one existed on the roof to cover the flashing so later no one will even notice its existence. Another by-product of this roof configuration is varying soffit heights and widths which require further design decisions. This page was generated at 12:11 AM. Creating a Roof with Different Eave Heights -Trouble. Depending on the size of your roofs and how much re-roofing work needs to take place, it may be a good idea to hire professionals.