Roofing experts: Windstorms that gust 140 kilometers per hour (or more) seem to be occurring more frequently. When strong winds, with even stronger gusts, blow over shingled roofs a ‘rippling effect’ which loosens the adhesive seal-strips that manufacturers place on their products allows Blow-offs to occur. It is very unlikely that these shingles will properly re-seal on roofs older than one year because of the sealants are too set to reactivate.
New roofs less than a year old will probably reseal once the hot summer days come, unless a ‘dust layer’ has settled onto the seal strips. Repaired shingle roofs should always be hand-sealed to ensure that they never lift again. It is also a good practice to hand-seal any shingle roof slope that displays ‘lifted shingles’ during high wind conditions. Install a tube of roof sealant into a caulking gun, and squeeze a bead of caulk beneath the bottom shingle edge to solve future ‘lifting’ problems. Roofs that are shingled with products that are no longer available (such as interlocking shingles, or renaissance shingles) will have to be replaced with different products as adviced by the roofing experts.
If the replacement product design is much different (i.e. a ‘strip’ shingle replacing an interlocking shingle) it may be necessary to replace the fixed flashing behind siding, or to use ‘shim flashings’
in-between the fixed flashings in order to maintain proper water run-off. Similar problems occur when converting a shake roof to a shingle roof—the flashings are much different. High winds effect all roof products! Winds that blow steadily are not as much of a problem, as are the very ‘gusty winds’. Gusts create sudden ‘lift’ areas, and it is this ‘rippling effect blow-offs.
If in doubt regarding correct repair procedures, so research or Ask The Roofing Experts®.Read More