Types of Roofing Material:
Asphalt shingles are by far the most popular product in the U.S.
residential roofing market. Asphalt shingles can be reinforced with either
organic or fiber glass materials. Although shingles reinforced with organic
felts have been around much longer, fiber glass-reinforced products have come to
dominate the market. The fire resistance of asphalt shingles, like most other
roofing materials, is categorized by UL Class A, B, or C. Class A is the most
fire resistant, while Classes B and C have less fire resistance. Generally, most
fiberglass shingles have a Class A fire rating, while most organic shingles have
a Class C rating.
A shingle's reinforcement will have little effect on
its appearance. Both organic and fiberglass products are available in laminated
(architectural) grades that offer a textured appearance. Zinc granules also can
be applied to shingles to protect against algae (fungus) attack, a common
problem in this area. Both types of shingles are also available in a variety of
colors.
Organic shingles consist of a
wood-fiber base that is saturated with asphalt and coated with colored mineral
granules. To fight fungus growth in warm, wet climates, they are available
with special algaecide granules.
Fiberglass shingles consist of a
fiberglass mat and top-and-bottom layers of asphalt and mineral granules.
Typically, fiberglass offers greater durability, but their manufacture is
important.
Wood Shingles / Wood Shakes:
Wood roofing products are predominately made from cedar, but can also be made
from redwood and southern pine. The primary difference between the two is that
shingles are machine-sawn; shakes are hand split for rougher appearance. Both
shingles and shakes come in different thicknesses. In this area, we would not
recommend them on slopes under 5" in 12" because leaves and pine needles can
build up on them and cause problems.
Tile:
Clay and concrete tile are the two most widely available forms of this
roof material. It is a durable but fairly expensive roofing material.
"Mission-style" and "Spanish" round-topped tiles are the most popular, but flat
styles also are available to create French and English looks. Tile is available
in a variety of colors and finishes. If you do not have a slate or tile roof
now or if you are building a home, a structural analysis is required by our firm
because tile is heavy. Putting tile on an insufficiently framed roof can cause
a myriad of problems.
Metal:
There are several types of metal roofs from flat locked copper to
standing steam. Metal roofs have a wide range of prices as well as aesthetic
choices. Metal in general breaks down in two groups: Structural and
Architectural. Structural panels are installed directly over purlins and in
effect become both the deck and the roof. Architectural panels are installed
over a wood or metal deck. Metal roofs offer good durability, but care must
be taken at penetrations.
Metal is a fast growing segment in the roofing
industry. As a result several new types of seaming methods and faux looks have
been developed which are not for every application. The wrong method of seaming
in certain areas can seriously compromise the quality of the total system, so it
is important to be aware of what you are getting. In general terms the
lighter the gauge, the wider the panel, and the shorter the seam; result in a
less expensive the roof.
Flat locked copper is a metal roof for low sloped
areas. It provides a "permanent" solution for those hard to get to flat areas
or blind valleys. We highly recommend it in conjunction with slate and tile.
By making a more permanent roof it avoids damage that can be caused by
uninstructed individuals.