The shingles, slate or tile are placed over the flashing on the upper and two sides and slipped under the lower edge of the flashing. A comprehensive checkout of your roof by a trustworthy roofing service will help you better understand which parts of your home are susceptible to damage from the weather and should receive special treatment.

Cap flashing– Similar to counter-flashing, cap flashing provides perpendicular protection to overlap another piece of flashing.

Hip and Ridge interconnects to secure roof shingles at both the hip and ridge locations, preventing water from entering the roofing system. Expansion Provisions: Where lapped or bayonet-type expansion provisions in work cannot be used or would not be sufficiently water/weatherproof, form expansion joints of intermeshing hooked flanges, not less than 1-inch (25-mm) deep, filled with mastic sealant (concealed within joints).

citation needed] Adhesive backed materials are convenient during installation, but such adhesives are not intended for long-term water-resistance.

Mock-Up: Before proceeding with final purchase of materials and fabrication of copper flashing and trim work components, prepare a mock-up of work. Seam adjacent flashing sheets with adhesive, seal and anchor edges in accordance with manufacturer's recommendations. At Cladco Profiles we aim to accommodate wherever possible, and so custom-cut corner flashings are available. Roofing Felt Underlayment: Asphalt saturated felt weighing not less than 30 lbs per 100 square feet.

However, aluminium will corrode if left in contact with pressure-treated wood, and also wet mortar and plaster. Where used: Ridge flashings are used to protect the roof and neatly join the two roof planes together. A reglet is used to hold the continuous cleat in place, thus eliminating the need for wood blocking. Aluminium– Arguably the most commonly used material, it is easy to form and shape as needed and is also lightweight.In a spot like this, it is very likely that water could flow down the wall above and past the shingles, therefore, damaging the building below, so this type of flashing correctly installed is important.