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| Half Gable Roof | See Shed Roof. |
| Hand-Tabbing | Applying spots of adhesive to shingle tabs. |
| Hatch | A unit used to provide access to a roof from the interior of a building. |
| Headlap | The distance that the topmost ply of roofing felt overlaps the undermost ply or course. |
| Heat Seaming | See Heat Welding. |
| Heat Transfer | Thermal energy going from an area of higher temperature to an area of lower temperature by conduction, convection, or radiation. |
| Heat Welding | Fusing the seams of separate sections of roofing material together through the use of hot air or an open flame and pressure. Also known as heat seaming. |
| Hem | The edge created by folding metal back on itself. Metal is hemmed for safety and strength reasons. |
| Hip | The angle formed by the intersection of two sloping roof planes. |
| Hip Roof | A roof that rises by inclined planes on all sides of a building. The line where two adjacent sloping sides of a roof meet is called the Hip. |
| Hoist | A mechanical lifting device. A hoist can be hand or electrically operated. |
| Holiday | An area where a liquid-applied material is missing. |
| Honeycomb | voids left in concrete because the mortar failed to fill the spaces around the aggregate. |
| Hot | Slang for hot bitumen. |
| Humidity | The amount of water vapor in the air. |
| HVAC | Acronym for Heating, Ventilating, and Air Conditioning. |
| Hypalon | The trademark name for Chlorosulfonated Polyethylene (CSPE), which is a single-ply roofing material. |