Onduvilla Over Exhisting Roof

Apply over solid decking or up to 1 layer of shingles.

Onduvilla over exhisting roof.

Most building codes allow two layers of organic or fiberglass asphalt shingles on roofs with a 4 12 pitch or less and three layers on steeper roofs. Onduvilla is compatible with any size house and roof style where asphalt shingles have been installed. Onduvilla onduvilla roofing shingles 3 5 ft x 1 33 ft ribbed red asphalt roof panel. Use the chalk line to mark the line at that spot across the roof.

Continue marking lines every five inches up to the roof ridge. Onduline s lightweight roofing systems have been designed and developed with the knowledge and expertise of roofers. Most standard roof structures. Overlap ridge trim 7 inches.

Fits many home styles. One layer is fine in most cases. Since they can be laid over existing asphalt shingles they re a relatively easy product for most roof installers to lay which also eliminates the labor to remove original materials. Parallel to corrugation with utility knife.

The uncut shingle should hang a quarter of an inch over the roof edge. If the structure can support the added weight a typical 20 square 2 000 square foot reroof will cost at least 1 000 less than a tear off job. Overlap shingles 3 5 inches. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

Across corrugation with circular saw. Position one of the uncut shingles on top of a trimmed shingle. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.

Installation is fast and efficient. The onduvilla roofing system is designed to fully replace an asphalt shingle roof. Mark the location of the top of the uncut shingle on the felt. I put ondura on my house roof over two layers of shingles 20 years ago.

Smart lightweight and efficient roof shingles. Call 844 371 2345 to request a free evaluation and estimate for your roof. Follow the overlapping guides that are in place on shingles.