Why mulch belongs in the assessment
University of Delaware Extension describes artillery fungus in woody mulch releasing sticky spore bodies that can land on light-colored siding. Its fact sheet notes that removal can be very difficult. That gives the assessor a possible explanation for attached dots, not permission to diagnose every dark mark as the same fungus. Send a wider view that includes the planting bed as well as a close view of the wall.
Separate black dots from the other siding concerns
Describe each visible pattern in the request. Small dots, broad green patches and a chalky-looking finish may need separate explanations. A contractor should not promise that the result for one tells you the result for all three. If the wall has several kinds of marks, ask which the proposed cleaning is intended to address.
Read about chalking and green buildupDo not chase the spots with a more aggressive method
CertainTeed warns that power washing its vinyl and polymer siding can cause damage, discoloration or moisture intrusion. For stubborn stains, it directs homeowners to a siding contractor and an inconspicuous test. Find the care instructions for your own siding rather than assuming the same technique suits every brand. Ask how any proposed spot treatment will be checked without damaging the finish.
Understand siding cleaning damage concernsMake spot removal a separate estimate question
Ask whether the contractor will assess individual spots, whether a trial area is needed and how the result will be judged once dry. Establish what happens if the dots remain while the rest of the siding gets cleaner. You can then decide whether the agreed appearance improvement is worth proceeding with.
Say how long you have noticed the dots, if known.
Describe any prior cleaners or attempts to remove them.
Show whether the same marks occur on trim, windows or nearby objects.
Confirm what general house washing includes and whether any further work is offered separately.
Address recurrence without assuming landscaping is included
The University of Delaware notes that mulch choice and moisture conditions affect artillery fungus. Ask a landscaping professional about the planting bed if new spots keep appearing. Washing the siding alone does not establish that the source has been addressed, and a house-washing estimate should not be read as a mulch-replacement or landscape-maintenance agreement.
Tell JC about the dots before booking
Use the house-washing request for a Hopatcong or Sparta home and describe the spots explicitly. Ask JC whether the condition fits its cleaning scope and what limits apply. If the spots are the main reason for the request, say so before agreeing to a general wash. This avoids paying for one result while expecting another.
Ask about a house-washing assessmentRelated questions
Are all black spots on siding artillery fungus?
No. Treat artillery fungus as a possible cause of firmly attached dots, especially near mulch. Let the assessment consider the material, pattern and history instead of deciding by color alone.
Can JC guarantee removal of every spot?
No complete-removal guarantee is made here. Ask JC whether it can assess the spots, what work is included and what may remain visible.
Should I scrape some dots off before the estimate?
Leave a representative area unchanged for inspection. Share photos and any previous treatment history, and consult the siding care instructions before attempting removal.
Sources and care instructions
Check the instructions for your exact material and product before choosing a cleaning method.