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Scheduling blower door tests for the coming heating season.
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A sample report

What the report shows, one spot at a time

This is a made-up report for a house like the one in the photo. Yours is written for your house, with your photos.

A white clapboard cottage with black shutters, a gabled attic window and a brick chimney behind a picket fence
  1. 1

    The attic hatch and the top plates

    Warm air rises through the hatch and every wall top under it. It is usually the first line in the report.

  2. 2

    The chimney chase

    A gap around the flue lets house air straight into the attic. We photograph it from above.

  3. 3

    Window sash and weight pockets

    Old double-hung windows leak around the sash and inside the cavity beside it. The report says repair, weatherstrip or replace.

  4. 4

    Where the porch roof meets the wall

    A seam that looks closed from the street can be open behind the trim.

  5. 5

    The front door and its threshold

    We measure the leak at the door with the fan running and note what the weatherstripping needs.

  6. 6

    The rim joist, where the wall meets the foundation

    A long, hidden seam that the smoke pencil finds from the basement.

Sample report. The numbered spots are examples.

What's in it

Six parts, in plain language

  • 1

    The leakage number

    The reading from the blower door at a steady pressure. It tells you how leaky the house is, and it is what the second test gets compared against.

  • 2

    The leak list and thermal pictures

    Every leak we found, where it is, a photo of it and how big it looks. On a cold day a thermal camera shows where heat is leaving, and we add those pictures too.

  • 3

    Combustion safety

    A check on your furnace or boiler and water heater, so closing the house up never traps exhaust.

  • 4

    Insulation and moisture notes

    What is in the attic, walls and basement, and where moisture is a worry.

  • 5

    The ranked fixes

    What to do, in what order, and what each step does and needs.

  • 6

    What we'd leave alone

    The windows that are fine, the wall that shouldn't be opened, the work that isn't worth it.

After the test

It is yours, and it is written to be shared

Send the report to another contractor, your heat pump installer or your brother-in-law. Our estimate is a separate document that points back to its lines, so you can compare ours with anyone's.

What you get

  • A copy for you, as a PDF and on paper

  • A short call to read it with you

  • The estimate arrives separately, with each line tied to a leak in the report

  • A second test after any work, with both numbers side by side

An open wall with metal studs and brick behind it during a renovation

About the report

How long is the test?

Plan on a morning for most houses: setup, the fan, the leak hunt and a combustion check. We tell you what to have ready.

What do I need to do beforehand?

Close the windows, secure pets, clear a path to the attic hatch and the basement, and tell us about anything that burns fuel in the house.

Is the report written for me, or for a contractor?

For you. It uses plain words, and every technical term is explained the first time it appears.

Does the report include prices?

No. The report says what is wrong. The estimate says what it costs. They are separate on purpose.

Book the test, get the report

The test is a paid visit credited to the work if you hire us. The fee is written in your booking.