It s certainly possible that your attic ductwork is leaky and that the return ductwork in the attic is sucking in asphalt dust.
Roofers left debris in attic.
No reason to have it removed unless it prevents from the insulation being installed properly.
After all there 39 s only so much debris i can throw out in the weekly pickup.
It s common for debris to land in the attic or on the ground around your home.
The reason it will be so noisy is because the roofers will use brooms wheelbarrows shovels and tools to get the substrate clean enough to install a new roof.
No need to have the debris removed.
A lesser known fire hazard that s left behind after a roofing job is moisture.
Meaning any dust pollen debris can and do get blown in on windy days.
Roofing debris can include roofing nails shingles pieces of fascia and flashing roofing felt and underlayment or pieces of drip edge.
Both shingles and sawdust can fuel attic fires turning a small flame into a devastating house fire.
Part of the job is cleaning up the mess and a good roofer will take care to lay down tarps have a dumpster on site to remove debris quickly and efficiently as the job progresses.
It s not harming anything.
Asphalt dust is definitely an irritant and could be causing the symptoms you are describing.
I 39 m determined to clean up the attic reasonably thoroughly probably over a period of time.
Remember the space under your roof is vented to outside air.
You should get a home performance contractor to perform a duct blaster test to test the tightness of your ductwork.