We contacted a contractor before about taking off EFIS synthetic siding and putting on hardi plank.

what they could call utilities could be electric, gas, propane, trash...any of those items.well will have an electric expense, and the upkeep of adding chemicals, testing the water and different reports to the state

They have dip-strips that test for multiple chemicals and contaminants. 

We just have to keep doing our thing.....while just shaking our head the whole time.Side note....on our concrete pours here, as you probably know, the concrete heats up as it’s being mixed in the truck as the chemical reaction does it’s thing, and on gov’t contracts where the concrete can not exceed 90-95 degrees before being placed.....we have to start at 3:00-4:00 am, and the concrete companies are used to it.  

no matter how many times I emptied the gutters of moss, they kept getting blocked again months later due to the moss falling off the roof into the gutter. we had the insurance guys come over to check it out and they recommended we get a roof cleaning company in every year and also one to do the gutters. after a lot of research we found out about the roof scraper tool from roofscraper.co.uk we bought this tool and then scraped the moss off. saved us a lot in recurring cleaning costs. the only thing is you need to apply a chemical after to stop the moss from growing back. these chemicals can be quite toxic so you must wear the appropriate safety gear!

I have had roofs cleaned by companies who do the low pressure washing w/ chemicals.

I got another quote for spraying (I forget the chemical) for ~350, and it is a local company my house cleaning company recommended.

Chemicals and h2s gases will eat the metal studs alive in a very short time. 

To me, it means they are responsible for ordinary maintenance one would do as a home owner, which means changing out the filter or adding chemicals to the water.

They are not as cheap anymore as you would think, and they need a LOT of work - cutting for the windows/doors is a pain, the interior wood door has been sprayed with deadly chemicals, etc.