Roof Sprocket Detail

A sprocket eaves detail is formed when the lower courses of tiles or slates lay at a shallower true pitch than the tiles or slates in the courses above.

Roof sprocket detail.

Bellcast or sprocketed eaves. It depends on whether you are talking about the front sprocket the one at the pedals called a chainring or the sprocket at the rear derailleur. Anyone standing that close to the house on the. Why does this happen or why would anybody want to form this detail.

Fix a plywood board or proprietary tray to provide continuous support to underlay to prevent water retaining troughs. Resources tiling information special tiling details bellcast sprocketed eaves. A horizontal timber or metal resting at the peak of the roof the rafters and trusses are connected to the ridge board for a cohesive framework. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load.

Truss and any of the details where the rafter overhang is excessively long. Sprockets for roof trusses. It is a waterproofing layer made of regular felt stacked above the solid. We also manufacture customized profiled sprocket ends to add a prestigious look to your roof.

The lowest gear at the front is the smallest. Bellcast sprocketed eaves section through eaves showing bellcast or sprocketed eaves because the minimum recommended roof pitch for plain tiles is 35 degrees 40 degrees for some handmade plain tiles the general roof pitch needs to be greater to ensure that the bellcast is at least the minimum pitch. Centuries ago the eavesdrop was that indentation line made around a structure when the rain fell off the edge of the roof onto the ground. Hips may require bedded hip ridge tiles and valleys may require an open lead valley to be used.

The use of the triangular sprocket piece on top of the rafter foot will not aid its strength in this respect unless of course it is carried up the rafter well beyond the wall plate position. In general this would mean beyond 700 or 800 mm depending on the rafter depth. Where roof slopes meet at valleys and hips the sprocket will have an effect on the fit of the arris curved valley tiles and the arris bonnet hip tiles. Fix a rafter spacer tray to provide a clear air path between underlay and insulation.

Think of how a roof extends beyond the siding and then think about how a hard rain may roll down the roof and onto the ground away from the structure.