How To Tie Two Gambral Roof Together

Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon.

How to tie two gambral roof together.

Cut two rafters with a circular saw to the pitch of the addition roof and nail them across the rafters on the old roof. You have to build the kneewall first then brace it straight and work around the wall and its braces while installing two sets of rafters. Start with the top corners of the roof first. Also most gambrel roofs require a kneewall to support the knuckle or the joint between the upper and lower roof slopes.

We simply slid the straightedge over until it hit the shed roof and then positioned a 2 by under the straightedge and marked the edge of the 2 by. A gable roof is fairly simple geometrically but when two gable roof lines intersect the geometry gets more complicated. Once the new roof is fitted you can then start to add the rafters and build up the new roof in the normal fashion. As every roof is unique you will need to plan for each type of roof addition project that you undertake.

Give special consideration to the two roofs and how they will work with one another. We did this at the top and bottom on both sides of the roof and connected the marks with a line which gave us the placement for the blind valley sleepers. A gambrel or barn style roof is simply a gable roof with a change in slope partway up the roof. Nail osb or plywood onto the rafters to enclose the roof.

Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. The work is cumbersome and when you re done this kneewall takes away from the available floor space below the gambrel. Place the osb or plywood on the top portion of the rafters and make sure that the edges run flush. Plywood will be mounted over the rafters and then your roof covering of choice can be used.

Nail along the edges of the osb or plywood driving the nails into the rafters every 8 inches 20 cm with 8d common nails. To calculate a gambrel roof select gambrel roof from the roof type dropdown list or click on the appropriate toolbar button to calculate a. They form an upside down v with the point at the top of the addition roof. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube.

Use long roofing nails to do this and apply a coat of roofing compound in the gaps and on all of the nail joints. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.