AMACE BT1-Roofing Materials

Roofing materials

function as an enclosing element

for the interior of a structure and prevent or control the

passage or transmission of moisture, air, heat and

radiation.

Batten

wood or metal material used to elevate

a roofing material, more particularly a roof tile,

over its undersheeting and also acting as its

anchorage.

Downspout

it conveys the water from the gutter

down to the storm drain.

Eaves

the lower edge of a sloping roof; that part

of a roof of a building which projects beyond the

wall.

Fascia Board

a board that is nailed horizontally

to the ends of roof rafters;

Flashing

a continuous piece or a series of

overlapping sheets of metal or other

impervious material installed to prevent the

passage of water into a structure.

Gutter

a channel set immediate below or at a

low point on the roof to catch and convey

rainwater off the roof.

Ridge roll

a metal sheet or tile covering capping

the ridge of a roof.

Roof beam

structural member supporting the

roof and roof frame through anchorages.

Purlin

a wood or steel laid horizontally on the

trusses or rafters on which the roof covering is

laid.

Purlin cleat

a wood or steel fastener used to

secure a purlin to its support.

Rafters

one of a series of inclined members to

which the roof covering is fixed.

Truss

structure composed of a combination of

wood or steel members, usually in triangular

arrangement so as to create a rigid framework.

Top Chord

the top portion of a truss which

forms the slope of the roof and structurally

supports the roofing material and extends

from the apex of the roof to the lowest point

or gutter.

Bottom chord

the bottom part of a truss

connected to the lower portion of a truss

and connecting the system to the roof

beam.

Web members

any member which joins

the top and bottom chords in a truss.

Underlayment

a layer between the finish (roof

material) and the surface which improves

adhesion, leveling and weatherproofing.

Undersheeting

a layer between the finish (roof

material) and the surface or framing and usually

serving as an additional layer of weatherproofing

and drainage.

GALVANIZED IRON (G.I.)

Corrugated sheets used for roofing and plain

sheet usually used for flashing, ridge roll and

gutters

RIB-TYPE

Usually comes in pre-painted metal roofing

featuring regularly spaced rib (or twin-ribs) in

contrast to continuous corrugations of a GI

roofing.

CLAY OR CONCRETE TILE

Tile roofing consists of clay or concrete units that

overlap and interlock creating a pattern.

Fire-resistant, durable, and require little

maintenance.

Heavy and requires stronger roof framing to

support the weight of the tiles.

Mission or Spanish tile

tapered,

semi-cylindrical roofing tiles laid convex

side up to overlap flanking, similar tiles

laid concave side up.

Interlocking tile

flat, rectangular

roofing tiles having a groove along one

edge that fits over a flange in the next

tile in the same course

Shingle tiles

flat, rectangular

tiles laid in an overlapping pattern.

Pantiles

S-shaped cross section,

laid so the downturn of one overlaps the

upturn of the next in the same course.

SHINGLES AND SHAKES

shakes are normally cut from

materials resistant to water, rot and sunlight.

May be used in its natural state but may be

treated with primer, stain and paint. May be

chemically treated to provide fire resistance.

Underlayment is required to provide additional

protection

SLATE

is a durable, fire-resistant, and low

maintenance roofing material. Where shingles

are split, trimmed, and drilled to receive copper

nails or wire ties.

SHEET METAL

Metal sheets made of either stainless steel,

galvanized steel, copper or zinc which is

assembled by interlocking seams and articulated

ridges and edges to create the visual pattern and

protect prevent leakage.

GUTTER

empty water from the roofs to strategically

located roof drains and into downspouts and leaders

(piping system) which, in turn, discharge into the main

storm drain.

FLASHING

operates on the principle that for water to

leak into a space, water must work itself against the

force of gravity or through a path during which the

driving force would be dissipated. It is usually found

on edges of a roof and usually made of a sheet metal

such as galvanized steel.

STRAP

Particularly for exposed gutters, they may be provided to add to the stability of the

gutter in handling larger volume of water. The strap,

usually made of the same metal material as the

gutter, anchors the top portion of the gutter to the

bottom most roof nailer or purlin.