Planning resource
Energy efficiency is a whole-home conversation.
Exterior products can support comfort and energy performance, but ratings, climate, orientation, installation, and the existing home all shape the result.
Roof and attic
Roof color and material can affect surface temperature, but insulation, air sealing, moisture control, and balanced ventilation often have a greater influence on indoor comfort. Ask who evaluates the attic and how any recommended ventilation changes work with existing insulation and exhaust vents.
Windows and doors
U-factor, solar heat gain coefficient, visible transmittance, air leakage, frame material, glazing, spacers, and installation all matter. Choose ratings for the climate and exposure rather than assuming one extreme is best for every room.
Siding and wall systems
Insulated siding or exterior insulation may reduce thermal bridging in some assemblies. The proposal should also explain drainage, flashing, water-resistive barriers, clearances, and how added thickness affects windows, doors, trim, and utilities.
Compare claims with context
Ask for the exact product model, whole-unit ratings where applicable, installation scope, expected maintenance, and limitations. Treat broad savings promises carefully; actual results depend on the home, climate, energy use, installation, and other changes.
Good planning connects a performance number to the way the product will actually be installed and used.
Comfort starts with context