10877 NW 33rd Street 33172, Doral


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Glossary

A

Aluminum – A non-rusting metal sometimes used for metal roofing and flashing.

B

Base Ply – The lowest segment of roofing in a roof system.

Batten – Attached to roof decking to give a secure base to anchor the roofing materials. Also referred to as Purlins.

Bead Mastic An adhesive sealant used for standing seam panels to protect the roofing system from moisture and water.

Blistering Bubbles or pimples in roofing materials. Usually moisture is related.

Bonderized – A bare metal coated product protected with an anti-corrosive solution.

Bonnet Roof – A reversed gambrel or Mansard roof with the lower portion at a lower pitch than the upper portion.

Box Rib – A wide rib on a metal roofing or siding panel. Can vary in size throughout the metal industry ranging from 2 to 6” between ribs.

Butterfly Roof – A V-shaped roof resembling an open book. A kink separates the roof into two parts running towards each other at an obtuse angle.

Butyl – Rubber-like material produced by copolymerizing isobutylene with a small amount of isprene.

Butyl Tape Sealant – Used for sealing shaped joints for a water and air-tight seal.

C

CAD – Computer Aided Drafting (CAD) is a design software that produces drawings to represent construction details.

Canopy – Any overhanging or projecting roof structure, typically over entrances or doors.

Cap Flashing Used to cover or shield the upper edges of the membrane base flashing, wall flashing, or primary flashing; usually composed of metal.

Cladding – A material used as the exterior wall enclosure of a building.

Caulk To fill a joint with mastic or asphalt cement to prevent leaks.

Chalk line – A line made on the roof by snapping a taut string or cord dusted with chalk. Used for alignment purposes.

Clamp – Clamps are small metal parts that are tightened and attached to the top of the metal roof at its standing seam.

Class “A” – The highest fire-resistance rating for roofing. Indicates roofing is able to withstand severe exposure to fire originating from sources outside the building.

Class “B” – Fire-resistance rating that indicates roofing materials are able to withstand moderate exposure to fire originating from sources outside the building.

Class “C” – Fire-resistance rating that indicates roofing materials are able to withstand light exposure to fire originating from sources outside the building.

Cleat – A piece of material typically used to elevate a finish material and/or used to protect that material during transport.

Clip – is a small metal component used to secure two pieces of metal to each other or to secure metal shingles or standing seam to solid decking.

Closed Valley – A valley that has an integral cover over the area where the shingles meet at the miter from adjoining roof planes. This valley carries water in hidden channels beneath the roof covering. In many cases, this cover creates a trap for debris such as leaves, ice, and snow to gather and clog the valley system, causing water to overflow underneath the roofing system

Coatings – A layer of material spread over a surface for protection or decoration.

Cohesion – The degree of internal bonding of one substance to itself.

Coil – A finished steel product such as sheet or strip which has been wound or coiled after rolling.

Coil Coating – The continuous process in which paint is applied to both sides of a moving strip of metal. The process usually includes cleaning, chemical pre-treatment, primer, and topcoat.

Cold Roof – A roof incorporating “above sheathing ventilation” in order to help prevent hot spots on the roof and subsequent wintertime ice dams.

Collar/Boot Pre-formed flange placed over a vent pipe to seal the roof around the vent pipe opening. Also called a pipe boot.

Column Wrap – A formed metal panel to enclose a wood or steel column.

Combustible – Materials capable of burning.

Concealed Fastener – A fastening clip system that is hidden beneath the metal panels.

Condensation – The process where water vapor becomes liquid. It occurs when warm moist air hits a cool surface. This can occur in or on poorly designed roof assemblies.

Cool Roofing – Roofs that have high reflectivity achieved either through light colors or reflective pigments. Can also refer to roof systems which have integral ventilation to help carry heat away from the structure and reduce cooling loads.

Copper – A natural weathering metal used in roofing.

Corner Trim A formed piece of metal used to enclose the corners of a metal panel; typically placed vertically.

Corrugated Metal Roofing A metal sheet that is roll-formed into a metal panel. These panels are then attached to the roof with screws. The traditional shape of corrugated sheet metal is round and wavy.

Counter flashing – That portion of the flashing attached to a vertical surface to prevent water from migrating behind the base flashing.

Course – A row of metal shingles running the length of the roof.

Coverage: The surface area covered by a specific quantity of a particular material.

Cricket – A peaked “saddle” constructed at the back of a chimney to prevent accumulation of snow and ice and to deflect water around the chimney.

Cupola A small structure added to a building's ridge for ventilation or as a decorative accent.

Curb – An accessory used to mount additions and provide a level resting structure on a sloped roof.

D

Decking – The surface installed over the supporting framing members to which the roofing is applied.

Door Trim Wrap A formed metal piece used to enclose the exterior frame of a window for added protection and aesthetics.

Dormer – is a framed window unit projecting through the sloping plane of a roof.

Drip Cap – A formed piece of metal used above door and window openings to divert moisture around the opening.

Drip Edge – A piece of metal placed on the eave of a roof to protect the underlayment and eave of the roof and direct water in the proper direction, often into the gutter or eavestrough.

E

Eave – The very edge of the roof at the bottom (downhill) of a roof plane.

Electrolysis – The passing of a direct electric current through an ionic substance that is either molten or dissolved in a suitable solvent, producing chemical reactions at the electrodes and separation of materials.

Endwall Trim – Used to separate and protect the transition of different surfaces from the end of a wall to a roof or siding plane.

F

Fading – Any lightening of the initial color

Fascia – Caps the perimeter of the gables and eaves of the roof, can then be used to hang gutters along the eaves.

Fasteners A wide variety of mechanical securement devices and assemblies, including nails, screws, cleats, clips, and bolts, which may be used to secure various components of a roof assembly.

Felt – A flexible sheet that is saturated with asphalt and used as an underlayment, sometimes called “tar paper”.

Field Forming – Used when the materials can be formed at the job site.

Finishes – A surface coating used to coat the surface of metal panes.

Fire Resistance – The property of materials or their assemblies that prevents or retards the passage of excessive heat, hot gases or flames under conditions of use.

Fixed Clip System – A formed metal component anchored to the building substrate used to secure two pieces of metal to each other or to secure metal shingles or standing seam roofing.

Flange – A metal edge that is typically 90 degrees perpendicular to the bent shape.

Flashings – Components used to help waterproof the perimeters and protrusions in a roofing system.

Flashing cement – Sealant designed for use around flashing areas as a component in the flashing system.

Flat Sheet – Metal formed by an industrial process that is formed into flat pieces.

Floating Clip System A formed metal component anchored to the building substrate used to secure two pieces of metal to each other or to secure metal shingles or standing seam roofing.

Foam Closure – An extruded foam piece formed from neoprene or polyethylene and conforms to the uniform bends of a metal panel to prevent wind, insect, and moisture damage.

G

Gable – The edge of the roof that runs from the eave (bottom) to the ridge; some within the industry also refer to this as the “Rake”.

Gable roof – A type of roof containing sloping planes of the same pitch on each side of the ridge. Contains a gable at each end.

Galvalume® – A coating, used over metal, that is composed of aluminum zinc for corrosion protection.

Galvalume Steel – Carbon steel with a protective alloy consisting primarily of aluminum on both sides of the steel. AZ50 grade is suggested for painted products while AZ55 is suggested for products with clear acrylic coating.

Galvanic Action – An electrolytic reaction between dissimilar metals in the presence of an electrolyte.

Galvanized Steel – Carbon steel with a protective alloy consisting primarily of zinc on both sides of the steel. Various grades are available based upon the thickness of the coating. G90 is suggested for residential applications.

Gambrel Roof – A type of roof containing two sloping planes of different pitch on each side of the ridge. The lower plane has a steeper slope than the upper. Contains a gable at each end.

Gauge – The standard measure of thickness of steel and steel panels.

Gutter – A channeled component installed along the downslope perimeter of a roof to convey runoff water from the roof to the drain leaders or downspouts.

H

Heat Tape – An electric cable used to help melt snow near the eaves of the roof.

Hem The formed edge of a metal panel where the metal is bent 180 degrees back onto itself to help soften the sharp cut metal edge.

Hip – The inclined external angle formed by the intersection of two sloping roof planes. Runs from the ridge to the eaves.

Hip Cap – The accessories used to cover the inclined external angle formed by the intersection of two sloping roof planes, either at the ridge or hip. Also called “ridge cap”.

Hip Roof – A type of roof containing sloping planes on each side.

Hot Roof – A completely sealed, not vented attic, the entire interior of which is often sprayed with closed cell urethane foam insulation. This can also be a conditioned space.

I

Ice and Water Shield – A self-adhering membrane, specifically designed to be used in heavy rain and snow areas where leaks can be a problem. In most cases you would install ice and water shield on the first three feet of the roof in addition to underlayment. Building codes will require this in certain areas.

Intake Ventilation: The part of a ventilation system used to draw fresh air in. Usually vents are installed in the soffit or along the eaves of a building.

K

Kynar 500 and Hylar 5000 – Trade names for polyvinylidene (PVDF) paint finishes that provide very strong longevity and durability including fade and chalk resistance that leads the coatings industry. Kynar 500 is produced by Arkema Chemicals, and Hylar 5000 is produced by Solvay Solexis.

L

Lean-to roof – A roof with one slope only that is built against a higher wall.

Low slope application – Method of installing roofing material on roof slopes between one and two inches per foot.

M

Mansard roof – A type of roof containing two sloping planes of different pitch on each of four sides. The lower plane has a much steeper pitch than the upper, often approaching vertical. This type of roof contains no gables.

Metal drip edge – This refers to trim, usually gable and eave trim, that has a slight bend at the edge which facilitates water runoff, away from the building. All our eave and gable trims contain this feature.

Metal Construction Association (MCA) Certification Program – MCA is the authority trade association for metal roofing and other metal construction products. Their Certification Program recognizes products that meet certain quality levels and standards for residential application.

Mold – A surface growth of fungus on damp or decaying matter.

N

Normal slope application – Method of installing roofing materials on roof slopes between 4 inches and 21 inches per foot.

O

Oil Canning- Waviness within a metal panel and is an inherent characteristic of light-gauge, cold-rolled flat metal products.

Open Valley – A valley design used to transition water and debris off of a roof slope, carrying the water on top of the roofing systems. These valley systems are designed to not clog with debris such as tree leaves and needles, ice, or snow.

Overdriven Fasteners – The term used for fasteners driven through roofing material with too much force, breaking the material.

Overhang That portion of the roof structure that extends beyond the exterior walls of a building.

P

Panel – A roll formed piece of metal coil that has been shaped into the desired profile/ribbing structure and are ready to be seamed together to form a roof.

PBR Panel – Purlin Bearing R Panel. One of the most common metal roofing and siding panels. Larger overlap section, stronger, and more weather-tight than R Panel.

Pitch – The slope of the roof plane, referred to as the height of rise over length of run, ie: 3:12. Steep slope refers to any pitch greater than 3:12 and very low slope refers to any pitch less than 1.5:12. Most metal roofs can be installed on roof pitches of 4:12 or greater though many systems can be installed on shallower roofs.

Pipe Jacks – Metal and/or neoprene flashings used to seal around plumbing pipes, round vents, conduits, and other roof penetrations. Also called “pipe flashings”.

Profile – The shape metal panels are formed into. The profiles are what determine how the panels fit and connect together.

Purlins – Attached to roof decking to give a secure base to anchor the roofing materials. Also referred to as “Batten”.

R

R Panel 36” wide metal panel with raised ribs and a flat area between the ribs. It does not have a purlin bearing leg so it’s typical application is a wall panel. See PBR Panel for roofing applications.

Rafter The supporting framing member immediately beneath the deck, sloping from the ridge to the eave.

Rake – The inclined edge of a sloped roof over a wall from the eaves to the ridge. These two slopes meet at the peak or ridge.

Re-cover (overlay) – The installation of a new roof system over an existing system without removing an existing system.

Re-roofing – Installing a new roof system on a building that is not new.

Ridge – The very top section of the roof running the length of the roof, where the two roof slopes come together.

Ridge Caps – Accessories used to cover the inclined external angle formed by the intersection of two sloping roof planes, either at the ridge or hip. Also called “hip caps”.

Ridge Vent – An outtake vent for air integrated into the ridge flashing. A ridge vent’s proper performance requires intake adequate intake vents, usually in the eave soffits of the home. For most homes this is the most effective method for siphoning air out of the attic or other air space.

Rise – The vertical distance from the eave line to the ridge.

Rollforming Equipment – The machinery that forms and shapes the coil into individual panels.

Roof Assembly – An assembly of interacting roof components such as roof deck, vapor retarder, insulation, and roof covering.

Roof Framing Styles – The different shapes and designs a roof can take, such as gable, hip, or barn.

Roof Plane – An even roofing area defined by having separate edges. One side of a gable, hip, or mansard roof.

Run The horizontal distance from the eaves to a point directly under the ridge. One half the span.

S

Sealant – Used most commonly to act as a sealant of joints or cracks to help prevent leaks. The higher grade sealants are usually butyl or polyether chemistry. Sealants should be used for aesthetic reasons as well as for redundant lines of defense against water intrusion. They should never be the sole line of defense. Also, sealants are not designed to be adhesives.

Self-Adhering Membrane A material layer that can adhere to a substrate and to itself at overlaps without the use of an additional adhesive.

Self-Drilling Screw A fastener that drills and taps its own hole during application.

Self-Tapping Screw – A fastener that forms receiving threads when turned into a previously drilled hole.

Sheathing Exterior grade boards used as a roof deck material.

Shed roof – A roof containing only one sloping plane. Has no hips, ridges, valleys or gables.

Slope – The degree of roof incline expressed as the ratio of the rise, in inches, to the run, in feet. Also referred to as “pitch”.

Slope Applications – The application of roofing materials to a roof based upon its slope or pitch. Can be achieved through “steep slope application, “normal slope application” or “low slope application”.

SMP or Siliconized Polyester – A type of coating consisting of a solvent-based system with polyester resin. Silicone additives are used to increase resin stability and coating flexibility. Standard polyester finishes are commonly used on agricultural metal roofs where price is of greater concern than performance.

Snap-lock – Metal roofing panels that have been carefully rolled formed with specific panel profile edges that snap together and require no hand or mechanical seaming during installation.

Snow Guard – Used in snow country to help break apart snow so it does not slide off the roof in large pieces. On standing seam roofs, these items need to be installed in a way that does not impede movement of the roofing system with thermal expansion and contraction. Also referred to as “snow break”.

Soffit – The finished underside of the eaves.

Solar Mounting System - Support system to sustain solar panels on a roof.

Solar Reflectance – The ability of a roof to reflect solar heat.

Solar Reflectance Index (SRI) – A measure that combines a constructed surface’s

ability to reflect solar radiation and emit thermal radiation.

Square – Enough product to cover approximately 100 square feet of the roof.

Span – The horizontal distance from eaves to eaves.

Standing Seam – A seam made by turning up two adjacent edges and folding the upstanding parts over on themselves.

Standing Seam Roof System – A type of metal roof that typically has panels run vertically with a raised, interlocking seam which joins one panel to the next. The roof panel system is secured to the roof substructure by concealed clips attached with screws to the substructure.

Starter Strip – Used to begin the attachment of many metal roofing systems. It is used at the eave (bottom) of the roof on many metal shingle systems and on the left hand edge of the roof on many standing seam systems.

Steep slope application Method of installing roofing material on roof slopes greater than 21 inches per foot.

Steep-Slope Roofing Generally roofs with slopes higher than 4/12.

Step Flashing – A method of flashing commonly used with standard roofing shingles and some other materials. Step flashing is generally not advised with metal roofing which usually uses continuous lineal flashings for greater life and watertightness.

Stone Coated – Metal roofing made from zinc or aluminum coated steel that is then coated with the same granules as composition shingles. It is attractive but faces similar problems of streaking, granule loss, and organic growth as traditional composition shingles.

Striation – Ribs or waves formed into metal panels to minimize oil canning.

Structural Roofing – refers to metal roofing that provides structural integrity to the building and does not require decking for installation. Generally these systems are not advised for residential application because a lack of decking can be a contributing factor to condensation issues.

Substrate – The surface upon which the roofing or waterproofing membrane is applied.

Super Polyester – A type of coating. Siliconized polyester with fade resistant pigmentation. The pigments enhance the performance of traditional polyesters, but the coatings are still prone to chalking as the resin breaks down over time.

Swarf – Metal shavings and chips that are caused by cutting and drilling roof panels. These fragments tend to rust quickly if they are not removed from the roof in a timely manner

T

Tar paper A flexible sheet that is saturated with asphalt and used as an underlayment. Also referred to as “Felt”.

Tear off – Removing an existing roof system.

Tee Panel – A type of standing seam where two panel edges come together and are connected at the top by a cap, which is then mechanically seamed in place to lock the panels together.

Telegraphing – A distortion that may arise when a new roof is applied over an uneven surface.

Thermal Block – A thermal insulating material that is placed between the metal building roof and the compressed insulation over the purlins.

U

UL-2218 Impact Resistance Rating – Test criteria for measuring the impact resistance of roofing materials, this rates roofing materials on a scale from I to IV with IV being products that best withstand the impact test.

Under-driven – Term used to describe a fastener not fully driven flush to the shingle’s surface.

Underlayment – 30 lb felt or synthetic sheet installed on the roof deck below the roofing material. This is required by code beneath all metal roofs, even if the old shingles are left in place.

V

Valley – The internal angle formed by the intersection of two sloping roof planes to provide water runoff. Refer to the glossary terms for Closed and Open Valley.

Vent – Any outlet for air that protrudes through the roof deck such as a pipe or stack. Any device installed on the roof, gable or soffit for the purpose of ventilating the underside of the roof deck.

Vented Ridge Cap – A formed metal piece used at the cap of a ridge that allows the use of a vented material and provides additional ventilation of the attic space in a roofing system.

Vent sleeve – Pre-formed flange placed over a vent pipe to seal the roof around the vent pipe opening. Also referred to as “collar” or “boot”.


 

W


 

Wind Uplift – The force caused by the deflection of wind at roof edges, roof peaks or obstructions. This causes a drop in air pressure immediately above the roof surface. This force is then transmitted to the roof surface. Uplift may also occur because of the introduction of air pressure underneath the membrane and roof edges, where it can cause the membrane to balloon and pull away from the deck

Window Wraps – Formed metal shapes used around the perimeter of a window as trim and protection.

Wood fascia – Finished wood trim around the exterior of a building to help accent siding and roofing.

Z

Z Metal – A “Z” shaped metal piece that provides a transition between two different materials.

Zinc Panel – A non-sparking, corrosion resistant material that is widely used in outdoor applications. Zinc is highly formable and is known to be environmentally friendly due to its infinite recyclability and low-impact production method.