Roofing

Roofing is the craft and trade of roof installation and repair. Roofing is subdivided by:

-type of roofing materials

-slope of the roofs

-roof occupation

- method of roofing installation

 Type of the roofing material is most important classification of the roofing.

By roofing materials roofs are divided on following types:

1) Shingles roofs

2) Slate roofs

3) metal roofs

4) rubber roofs ( EPDM,TPO, Torch AP, ….)

5) wood roofs

By slope of the  roofs roofing is divided on following types:

1. Flat roofs


2. Pitched roofs

By roof occupation  trade of roofing is divided on following types:

1 residential roofing

2 commercial roofing

3 industrial roofing

By method of roofing installation:

1. Torch down roofing


2. Mechanically attached roofs


3. Glue down roofs

 The roof is one of the universal structures found on houses  around a globe. Purpose of it is to shed water off the building and to prevent it from accumulating on top of the roof. To achieve this goal, roofs may be highly pitched (sloped) or low sloped in form. Low sloped roofs are commonly found on industrial/commercial type structures. Pitched roofs are the primary design found on residential  houses. Think WHY? The most common type of low sloped roof for industrial/commercial structures are the conventional built-up, modified bitumen, or single plies (EPDM, PVC, TPO). Metal standing seam roofs are becoming increasingly common on low sloped roofing assemblies.

Residential roof designs in mild climates or where there is little precipitation tend to exhibit lower pitched roofs and drainage at the exterior wall; an example of residential flat roof. In northern climates, where temperatures drop below freezing, or in southern climates with high temperatures, the need for greater thermal resistance will dictate the type of roof design as well as the waterproofing membrane specification. In areas that have a high accumulation of snow, a minimum slope of 6 inches in 12 inches (6/12) of roof surface is required. Roof pitches may exceed 45 or 50 degrees.

Cool roofs and green roofs are becoming increasingly popular, and in some cases are mandated by local codes. Cool roofs are defined as roofs with both high reflectivity and high emissivity. Green roofs have soil placed over the waterproofing membrane in which plants and even trees are planted.

Some building styles, for example, geodesic and A-frame, blur the distinction between wall and roofs. Pitched roofs are often covered with asphalt shingles (in the US and most of eastern Canada) although thatch, wood shake, steel, corrugated galvanized iron, slate and tile roofs are used elsewhere.

Best regards,
You roofing expert