01 May 1999
be effective. With long-lived materials such as tile and slate, repair to flashings and penetrations make
a great deal of sense if the primary roofing is relatively intact. Broken units take skill to replace.
Repairs: Emergency, Temporary, and Permanent
(1) Emergency repairs. Emergency repairs imply leaks are caused by a loss of roofing and
underlayment. An emergency patch could consist of a nailed tarpaulin, roofing felt with mastic, plastic
film, or a nailed sheet of galvanized metal.
(2) Temporary Repair. A temporary repair would be to reinstall underlayment and to cover
with locally available material even if the appearance does not match the rest of the roof.
(3) A Permanent repairs. A permanent repair would be to install similar looking material
making certain that new material extends well under remaining material so that water cascades away
from laps. This permanent repair should last as long as the rest of the roof.
d. Repair Work by User. A common repair would be to replace a broken or missing roofing unit.
Each type requires specific skill. In general, the broken unit would be removed by gently prying up the
fasteners (if used) up-slope of the unit; a new unit would be inserted and fastened; the upstream
fasteners would then be carefully redriven. Adhered units would be replaced and set in a fresh bed of
mortar, asphalt mastic, or foam adhesive as appropriate. The steeper the roof, the more safety
becomes of concern. Fall protection such as toeboards and body harnesses are essential. Traffic on
old slates, tiles, shingles, and shakes can do considerable damage.