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DayHours
Monday7:00 AM to 6:00 PM
Tuesday7:00 AM to 6:00 PM
Wednesday7:00 AM to 6:00 PM
Thursday7:00 AM to 6:00 PM
Friday7:00 AM to 6:00 PM
Saturday8:00 AM to 5:00 PM
Sunday8:00 AM to 5:00 PM

Roofing Terminology and FAQ


Glossary of Roofing Terms

A

  • Algae - Rooftop fungus that can leave dark stains on roofing.
  • Angled Fasteners - Roofing nails and staples driven into decks at angles not parallel to the deck.
  • APA - American Plywood Association. Tests and sets standards for all varieties of plywood used in the U.S.
  • Apron Flashing - Metal Flashing used at chimney fronts.
  • ARMA - Asphalt Roofing Manufacturer's Association. Organization of roofing manufacturers.
  • Asphalt - A bituminous waterproofing agent used in various types of roofing materials.
  • Asphalt Concrete Primer - Asphalt based primer used to prepare concrete and metal for asphalt sealant.
  • Asphalt Plastic Cement - Asphalt based sealant material meeting ASTM D4586 Type I or II. Used to seal and adhere roofing materials. Also called mastic, blackjack, roof tar, bull.
  • ASTM - The American Society for Testing and Materials. Organization that sets standards for a wide variety of materials, including roofing.

B

  • Back-surfacing - Granular material added to shingle's back to assist in keeping separate during delivery and storage.
  • Blistering - Bubbles or pimples in roofing materials. Usually moisture related. In shingles, blisters are either moisture under the material or moisture trapped inside the material.
  • Blow-offs - When shingles are subjected to high winds and are forced off a roof deck.
  • Buckling - When a wrinkle or ripple effects shingles or their underlayments.

C

  • Closed-cut valley - A shingle valley installation method where one roof plane's shingles completely cover the others. The top layer is cut to match the valley lines.
  • Corrosion - When rust, rot, or age negatively effect roofing metals.
  • Counter-flashing - The metal or siding material that is installed over roof-top base flashing systems.
  • Crickets - A peaked water diverter installed behind chimneys and other large roof projections. Effectively diverts water around projections.
  • Cupping - When shingles are improperly installed over an existing roof or are over-exposed, they form a curl or cup.

D

  • Deck - The substrate over which roofing is applied. Usually plywood, wood boards, or planks.
  • Dormer - A raised roof extending out of a larger roof plane.
  • Drip-edge - An installed lip that keeps shingles up off the deck at the edges and extends out over eaves and gutters, and prevents water from backing up under shingles.

E

  • Eaves - The roof edge from the fascia to the structure's outside wall. In general terms, the first three feet across a roof is termed the eave.
  • End-laps - When installing rolled products in roofing, the area where a roll ends on a roof and is overlapped by the next section of rolled material (underlayments, rolled roofing).
  • Exposure - The area on any roofing material that is left exposed to the elements.

F

  • Fasteners - Nails or staples used in securing roofing to the deck. Felt-organic or paper-based rolled material saturated with asphalt to serve as roofing underlayment.
  • FHA - The Federal Housing Authority. Sets construction standards throughout the U.S.
  • Fiberglass mat - Fibers condensed into strong, resilient mats for use in roofing materials.
  • Flange - Metal pan extending up or down a roof slope around flashing pieces. Usually at chimneys and plumbing vents.
  • Flashing - Materials used to waterproof a roof around any projections through the roof deck.
  • Flashing cement - Sealant designed for use around flashing areas, typically thicker than plastic cement.

G

  • Gable roof - Traditional roof style; two peaked roof planes meeting at a ridge line of equal size.
  • Granules - Crushed rock that is coated with a ceramic coating and fired, used as top surface on shingles.

H

  • Hand-sealing - The method to assure sealing of shingles on very steep slopes, in high wind areas, and when installing in cold weather.
  • High nailing - When shingles are nailed or fastened above the manufacturer's specified nail location.
  • Hip legs - The down-slope ridges on hip roofs.
  • Hip roof - A roof with four roof planes coming together at a peak and four separate hip legs.

I

  • Ice dam - When a snow load melts on a roof and re-freezes at the eave areas. Ice dams force water to "back-up" a roof and cause leakage.

L

  • "L" flashing - Continuous metal flashing consisting of several feet of metal. Used at horizontal walls, bent to resemble an L.
  • Laminated shingles - Shingles made from two separate pieces that are laminated together. Also called dimensional shingles and architectural shingles.
  • Laps - The area where roll roofing or rolled underlayments overlap one another during application (see also side laps and end laps).
  • Low slopes - Roof pitches less than 4/12 are considered low sloped roofs. Special installation practices must be used on roofs sloped 2/12 - 4/12.

M

  • Mansard - A roof design with a nearly vertical roof plane that ties into a roof plane of less slope at its peak.
  • Mats - The general term for the base material of shingles and certain rolled products.
  • Modified bitumen - Rolled roofing membrane with polymer modified asphalt and either polyester or fiberglass reinforcement.
  • Mortar - Mixture of sand, mortar, limestone, and water used in bonding a chimney's bricks together.

N

  • Nail-guide line - Painted line on laminated shingles to aid in the proper placement of fasteners.
  • Nail-pop - When a nail is not fully driven it sits up off the roof deck.
  • Nesting - Installing a second layer of shingles, aligning courses with the original roof to avoid shingle cupping.
  • NRCA - The National Roofing Contractors Association. Respected national organization of roofing contractors.

O

  • Open valley - Valley installation using metal down the valley center.
  • Organic mat - Material made from recycled wood pulp and paper.
  • Organic Shingles - Shingles made from organic (paper) mats.
  • OSB - Oriented Strand Board. A decking made from wood chips and lamination glues.
  • Over-driven - The term used for fasteners driven through roofing material with too much force, breaking the material.
  • Over-exposed - Installing shingle courses higher than their intended exposure.

P

  • Pitch - Ratio of the rise of the roof to the span of the roof.
  • Power vents - Electrically powered fans used to move air from attics and structures.
  • Plastic cement - Asphalt based sealant. Also called bull, mastic, tar, asphalt cement.
  • Plumbing vents - Term used to describe plumbing pipes that project through a roof plane. Also called vent stacks.
  • Prevailing wind - The most common direction of wind for a particular region.

Q

  • Quarter sized - Term for the size of hand sealant dabs; the size of a U.S. $.25 coin.

R

  • Racking - Method of installing shingles in a straight-up-the-roof manner.
  • Rake edge - The vertical edge of gable style roof planes.
  • Rigid vent - Hard plastic ridge vent material.
  • Roof louvers - Rooftop rectangular shaped roof vents. Also called box vents, mushroom vents, airhawks, soldier vents.
  • Roof plane - A roofing area defined by having four separate edges. One side of a gable, hip, or mansard roof.

S

  • Self sealant - Sealant installed on shingles. After installation, heat from the sun will activate sealant to seal the shingles to each other.
  • Selvage - The non-exposed area on rolled roofing. Area without granules. Designed for nail placement and sealant.
  • Side-laps - The area on rolled material where one roll overlaps the rolled material beneath it. Also called selvage on rolled roofing.
  • Side-walls - Where a vertical roof plane meets a vertical wall. The sides of dormers, etc.
  • Soffit ventilation - Intake ventilation installed under the eaves, or at the roof edge.
  • Starter strip - The first course of roofing installed. Usually trimmed from main roof material.
  • Steep slope roofing - Generally all slopes higher than 4/12 are considered steep slopes.
  • Step flashing - Metal flashing pieces installed at side-walls and chimneys for weatherproofing.

T

  • Tab - The bottom portion of traditional shingle separated by the shingle cut-outs.
  • Tear-off - Removal of existing roofing materials down to the roof deck.
  • Telegraphing - When shingles reflect the uneven surface beneath them. Shingles installed over buckled shingles may show some buckles.
  • Transitions - When a roof plane ties into another roof plane that has a different pitch or slope.

U

  • Under-driven - Term used to describe a fastener not fully driven flush to the shingle surface.
  • Underlayments - Asphalt based rolled materials designed to be installed under main roofing material, to serve as added protection.

V

  • Valleys - Area where two adjoining sloped roof planes intersect on a roof creating a "V" shaped depression.
  • Vapor - Term used to describe moisture laden air.
  • Ventilation - The term used in roofing for the passage of air from an enclosed space.

W

  • Warm wall - The finished wall inside of a structure; used in roofing to determine how to install waterproof underlayments at eaves.
  • Warranty - The written promise to the owner of roofing materials for material related problems.
  • Waterproof underlayments - Modified bitumen based roofing underlayments. Designed to seal to wood decks and waterproof critical leak areas.
  • Woven valleys - The method of installing valleys by laying one shingle over the other up the valley center.

Why Choose Us?

  • Fully licensed and insured
  • Nearly 30 years experience
  • Established in 1981
  • We pride ourselves on quality workmanship and satisfied customers
  • We do not use ANY subcontractors - you work directly with us
  • Warranties included on all our roofing work
  • Quality and affordability