More likelynallmofmthat gutter debris is from a prior roof tear off or wear and damage.
Is it normal for shingles to just fall off roof.
If the asphalt is poor quality if there s too much powdered stone filler in the shingles or the manufacturing process is not great the granules will eventually come off the shingles much faster and in greater amounts than is normal.
Where one shingle tab blew off your roof you have a 1 in 3 chance that the missing shingle was sitting directly above an open seam between the shingles below.
That s because this type of roof shingles standard 3 tab asphalt shingles are installed side by side with the next upper row of shingles covering the side seams.
In many cases unusually strong wind is to blame but installation issues can make shingles more vulnerable to weather patterns or even cause them to fall off when wind is minimal.
It seems to be most prevalent early and later in the shingles life.
When roof shingles get blown off during storms or strong winds homeowners typically call for professional roofers to repair them.
These other granules are not attached to the shingle so they are likely to fall off slowly from manufacturing to the packaging to the installation on your roof and even after.
How long will it continue to do so.
New asphalt roof shingles.
Have the gutters cleaned out and check their slope.
In other words when shingles are new excess granules from the manufacturing process fall off when somebody walks on roof and when it rains.
Just had a new roof put on and it has been shedding granules.
Later in life as the shingles become more brittle granules continue to fall off exposing the shingles fiber underlayment.
Before you get to work replacing your shingles you should determine what caused them to fall off in the first place.
While a bit of granule loss is normal there may be a need to inspect your roof to ensure that the actual intact granules are still in place.