Ondura 5259 4 in x 39 5 in cellulose fiber asphalt roof panel ridge caps.
Roof ridge board joint.
The rafters bear most of the weight of the roof.
This video shows how to make roof rafters with a rafter square and or a speed squ.
Because the ridge board is a smaller member typically only an inch thick sometimes even less it is not a structural member and doesn t carry the gravity load.
Its only job is to provide a connection point for the roof joists on each side of the roof.
My crew and i call this technique penciling the ridges after the big pencil shaped piece of wood that results when the cuts are made.
To extend the material to the correct length i splice ridge boards with a v shaped joint as shown in the drawing.
The ridge board and rafters are the strength of the roof.
The ridge board runs the length of the building and provides support for the tops of the rafters helping the whole roof structure work together as a system.
The ridge board holds them in place.
To begin the cuts overlap the ridge material with the crowns pointing in the same direction.
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The ridge board must be set as perfectly as possible so take your time and use careful measurements.