The short answer
Most retrofits use the basement ceiling for main-floor inlets and closets or the attic for upper floors. Bungalows with an unfinished basement are usually simplest. Homes with a fully finished basement and no attic access take more planning.
What to expect
An in-home visit to look at routes, a written quote, then usually one day of work. Each inlet needs one opening about the size of a light switch box. Any other access openings are discussed first.
Next step
Read more on our retrofit page or request a free quote.