Click here for free quotes

Roofing Jargon Buster

Within this jargon buster we cover the common jargon and phrases used while installing or replacing a roof on your home. If you’re in the process of planning a roof replacement or repairing your current roof, then we recommend you take a look at, or even print this list, before getting started to help you avoid common pitfalls. Don’t forget to check out our other jargon busters in the series, as well as our roofing replacement cost guide.


Strips of a solid material (e.g. wood, metal) providing a fixing point for roofing materials (e.g. tiles or shingles)


Cladding is the overlapping of roofing materials to provide a protective waterproof and durable layer.

Curved Roof

A Curved Roof gives a modern appearance as the roof is in the shape of an arc and can be designed to the radius to meet your design preference and budget.

Dormer Roofs

When people extend into their loft space they usually add dormer windows to increase head height & volume of space in available inside their new loft conversion / room, in most cases planning permission will be required for completing this work.

Dormer Windows

A vertical window that projects outward from the properties pitched roof.


Eaves on a house are usually where the edges of roof overhangs the wall of the property which includes the fascia, guttering and soffit.


The fascia is the area where the roof meets the outer wall of the house, which supports the bottom row of roof tiles and guttering.


Flashing is thin pieces of material (usually aluminium or galvanized steel), that’s used over roof joints to form a weather seal to prevent damage caused by water seeping in.

Flat Roof

A flat roof is a term used for a roof that is completely flat or almost level (usually less than 10 degrees), these roofs are usually covered in various materials including Felt, Asphalt, EPDM Rubber, GRP (Fibreglass).

Green Roof

Green Roofs are roof surfaces of a building that are completely or partially covered with vegetated layers planted over a waterproofing membrane.

Insulation / Roof Insulation

Insulating your loft / roof is way to reduce heat loss, which will also help lower your heating bills by concealing the heat within your property.

Inverted Roof

Inverted roofs are roofs where the thermal insulation layer is above the roof structure and waterproofing layer, resulting in a waterproofing.


Roofing Joists are horizontal member which can lie flat or pitched and will be placed across open area/space within your construction.

Pitched Roof

A pitched roof is a type of roof with some slope and meets at an angle, normally in the centre of your home and most common on domestic properties.


Rafters are a series of sloped structural wooden beams which will create your basic roof structure.


The ridge of a roof is the highest point of a roof where two opposing roof areas meet.

Ridge tiles

A curved or semi-circular tile used in creating a roof ridge.

Roofing Flashings

Flashing is the name given to covering the metal ridge where the two sides meet on the roof, enabling sealing junctions between roof tiles or slates.

Roofing Slates

Roof Slates are one of the longest-lasting roof materials, lasting sometimes more than 75 years made from natural rock that is mined and cut to become a form of ‘shingle’.

Roofing Tiles

Roof tiles come in varying materials, sizes and quality and are mainly designed to cover your roof and to keep out rain.

Shingles (Asphalt)

A roof covering built from individual rectangular overlapping elements, which helps form a tough, waterproof layer.


The flat horizontal structure / board used to fill the space between the wall of the building and back of the fascia board.


A truss roof is made up of a number triangular wooden frame (or trusses) designed to support the roof on the building.

Underlay (Roofing)

Roofing underlay is a waterproof & thermal insulating barrier material that is placed between the back of the roof tiles / roof frame.


Roof valley is where two sloping roofs meet together; they are ‘V’ shaped channels that sit within the folds of the roof.

Vapour Barrier

Is any material used for damp proofing (usually a plastic / foil sheet), preventing moisture getting into the walls, ceiling and roofs.


The roof void is the space between the ceiling joists and the roof surface.