Home Inspector Test Study Guide 2026

Solid fuel heating systems generate heat by burning solid materials such as wood (e.g., woodstoves, fireplaces) or coal (e.g., coal furnaces). An electric heater, in contrast, operates by converting electrical energy directly into heat through resistance. Therefore, an electric heater does not use solid fuel and belongs to a different category of heating systems.

Spray polyurethane foam is combustible and must be covered with an approved thermal barrier like ½-inch drywall to limit fire spread in occupied spaces.

Hydrostatic pressure is the lateral and upward force exerted by water-saturated soil or groundwater against foundation walls and slabs, a leading cause of basement water intrusion.

When steel lintels, which support masonry above openings, begin to rust, they expand significantly, sometimes up to seven times their original volume. This expansion exerts immense pressure on the surrounding brickwork. The stress typically manifests as horizontal cracks in the mortar joints, particularly at the top corners of window and door openings, indicating structural distress caused by the expanding rust.

Ice dams form when heat escapes from the living space into the attic, warming the underside of the roof deck. This causes snow on the upper portion of the roof to melt. The meltwater then runs down to the colder eaves, where it refreezes, creating a dam of ice.

A slope of around 2 percent (approximately 1/4 inch per foot) is commonly recommended for residential lots to facilitate proper drainage and prevent water accumulation.