Onduvilla Over Exhisting Roof

Overlap ridge trim 7 inches.

Onduvilla over exhisting roof.

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. 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. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. 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. I put ondura on my house roof over two layers of shingles 20 years ago. Continue marking lines every five inches up to the roof ridge. Use the chalk line to mark the line at that spot across the roof.

Know your town s regulations regarding roofing materials since some don t permit more than two roofing layers. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. Position one of the uncut shingles on top of a trimmed shingle. Parallel to corrugation with utility knife.

One layer is fine in most cases. The onduvilla roofing system is designed to fully replace an asphalt shingle roof. Onduvilla is compatible with any size house and roof style where asphalt shingles have been installed. Mark the location of the top of the uncut shingle on the felt.

Across corrugation with circular saw. Follow the overlapping guides that are in place on shingles. We have a range of lightweight roof shingles for your diy project whether renovating or building from new. The uncut shingle should hang a quarter of an inch over the roof edge.

Installation is fast and efficient. I ve had three hurricanes and countless numbers of bad storms with my yard being flooded with 6 20 inches of water from. Onduline s lightweight roofing systems have been designed and developed with the knowledge and expertise of roofers. Call 844 371 2345 to request a free evaluation and estimate for your roof.

Most standard roof structures. Smart lightweight and efficient roof shingles. 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.