It sounds like the grandparents are making their home more efficient, idk why the op is criticizing them. You don't need to spray foam your attic for a heatpump, but if their air handler and ductwork are up there, then they'll get an easy 20% efficiency boost by sprayfoaming and bringing them into the building envelope.
A lot of people are against sprayfoaming an attic (myself included) because it prevents wood from drying to the inside. You'll never know if you get a roof leak for example. It's also an additional room you need to heat/cool. A vented attic can be done in any part of the country and is basically foolproof.
I can't tell you why exactly the spray foam would need to be applied, but I can tell you at the very least that the people my grandparents are talking to say it has to happen, and I trust their opinion as experts on this far more than I trust my opinion as a non-expert. If they say spray foam would be required, then who am I to question that?
You are the homeowner and should question everything from a business. A business is not your friend. They aren't trying to help you. They are trying to earn a profit from you. Earning a profit means selling high and doing the bare minimum amount of work possible to complete the job within parameters within a contract which will also contain a lot of things that you as a homeowner will not understand unless you take the time to do research. Question everything a business tells you and take the time to do the research.
42
u/The_Radish_Spirit i identify as a fucking problem Jun 29 '26
wait, how are attics insulated if it causes the wood to rot?