Insulation Estimating Services: What You Get, What It Costs, How to Choose

An insulation contractor bids more sets per crew than almost any other trade. The jobs are a day or two each, the builders send plans in batches, and the person who measures them is usually the owner, after hours. That is the shape an insulation estimating service exists to fix: send the set out, get the quantities back, bid from them.

What an insulation estimating service measures

• Exterior and interior wall runs with their heights, less the windows and doors, per assembly and R-value.
• Flat ceilings and attic floors by area, for blown or batt.
• Roof decks by pitch, for a foam-at-the-roofline job — a plan shows the footprint and the pitch factor turns it into the sloped area you actually spray.
• Garage walls and the garage ceiling under living space, and the bonus room over the garage, which is the scope most often argued about afterwards.
• Band joists, rim joists, cantilevers and knee walls — the places a plan set hides insulation.
• Square feet for everything, and board feet for spray foam, so you can order from the same document you bid from.

What the documents should contain

Ask for four things and refuse a service that cannot provide the first two. Marked-up plan sheets, with every measured area drawn on the sheet it came from and colour-keyed by assembly: without them the quantities cannot be checked. A workbook with one row per assembly per sheet, so a total that looks wrong can be traced to a floor. The basis and the unit on every line — square feet for batt and blown, board feet beside square feet for foam. And, if you want it priced, your own rates on your own letterhead, so the document can go to the builder as yours.

What to put in the scope note

The architect shows an assembly and an R-value. Where the thermal boundary falls on this job is often a conversation you had with the builder, and a service cannot measure a conversation. Write it down with the order:

• The boundary: attic floor or roofline, and which rooms sit under which.
• Product and R-value per assembly: open cell, closed cell, batt, blown, rigid, and the thickness or R-value for each.
• The garage: walls, the ceiling under living space, and whether the bonus room is in or out.
• Deductions: whether openings come off the wall area or the wall is measured gross.
• Anything the builder said on the phone that is not on the drawings.

What it costs

Among the services that publish a figure, a single-trade insulation takeoff runs from about $150 to $350 per plan set, quoted after you send the plans; monthly packages with a dedicated estimator start around $1,400 a month. Hourly offshore services advertise $8 to $18 an hour with no price visible before you order. The full comparison, with each provider's own published terms, is in our takeoff services cost guide.

Questions to ask before the first order

1. 1
   Do you report board feet for foam?If the answer is square feet only, you will be converting by hand before you can order material.
2. 2
   How do you treat the bonus room and the garage ceiling?The answer should be "however your scope note says", not a default you were not told about.
3. 3
   Do I get marked-up sheets?Every time, on every sheet with scope on it. A legend with your company name on it is a bonus.
4. 4
   What happens if the set is bigger than quoted?You should be asked to approve a new price before work continues.
5. 5
   What is the real turnaround?Counted from when, and does it include the wait for the quote?

The checks before it reaches a bid

Treat an outsourced insulation takeoff the way you would treat one from a new hire. Confirm one printed dimension against the takeoff's measurement. Walk the scope you know is there — the bonus room, the band joist, the knee walls — by name. Add the lines up against the total. Then read the pricing line by line, because a rate you did not set is a rate you have not agreed to.

Written by the team at Opulence Built, who also run an insulation and concrete contracting business. We mention our own software where it is relevant and say so when we do.