I didn’t read the entire report, but here are a few of my observations/suggestions:
You wrote this report in HG, so I would suggest that you check out their new Energy Template.
Roof Section: RR - Recommend that the knee wall areas, under the roof, be insulated with a spray foam type insulation installed on the underside of the roof and that the soffit vents be sealed in these areas.
Was the fiberglass insulation installed in the roof rafters or the floor of the attic? From an energy perspective, it does not make sense to recommend to your client that they insulate the underside of the roof with spray foam, unless the attic is inside the thermal boundary. Furthermore, telling them that they should seal the soffit vents is not good advise. A better approach would be to instruct them to install insulation baffles to keep the insulation from blocking the soffit vents and to prevent wind washing.
- Heating Section: The house was heated by three category 4 high efficiency induced draft furnaces, two in the upper area of the house and one in the basement. The basement furnace did not have the manufacturer required combustion air intake vents ( Picture 1 ). This causes the furnace to draw combustion air from the house;'s interior air. This condition has lowered the efficiency of the furnace (by about 10%) and will reduce the furnaces life. It also causes the house to be under negative interior air pressure, which further enhances the cold air infiltration problem.
The combustion air intake is not always “required” to be taken from the exterior. Did you confirm the make and model, then look up the manufacturers installation instructions? Also, where did you come up with the 10% energy reduction theory?
In addition, the last sentence about negative air pressure is alarming and unfounded. In order to determine if their is too much negative pressure within the CAZ, you would have to conduct a Combustion Safety Test.
- Insulation Section:
The built-in seat area, at the front of the house, displayed signs of cold air infiltration and lacking insulation behind the built-in seat ( Picture 1, 2 ) with an eight degree difference.
Unless you can see behind the wall or prove that the insulation is “lacking”, you should have said that the thermal pattern is “consistent with missing or misapplied insulation.”
The corner closet, at the rear of the house and adjacent to the garage, displayed an almost complete lack of insulation ( Picture 3, 4 ). This condition also exists in the area of the 2nd floor, above.
Again, how to you confirm the “complete lack of insulation.” I’m not seeing that conclusion from the thermal image you are referencing in the report.
- I noticed in several sections, you used the “Inspected” term, but then went on to describe a deficiency.
That’s all for now…didn’t really have time to go through it line by line.