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Our estimators will work with you on the best possible solution that fits your building needs.


1. Fully Adhered
2. Mechanically Attached
3. Ballasted


1. Fully Adhered
2. Mechanically Attached


1. Fully Adhered
2. Mechanically Attached

Built Up Roof

1. Gravel Surface
2. Smooth Surface

Modified SBS

1. Granulated Cap Sheet
2. Smooth Cap Sheet
3. Cold Applied
4. Hot Applied

Metal Roofs

1. Snap on Standing Seam Roof
2. Tee lock Standing Seam
3. Inter-Lock Standing Seam
4. Double Lock Standing Seam

Roof Coatings

We offer a variety of different Coating System that may be an option.

Commercial Roof Terminology


Abrasion Resistance: The ability of a membrane to resist abrasion caused by foot traffic, wind-blow particles, or the movement of equipment

Absorption: The ability of a material to accept quantities of gases or liquids

Adhesive: A substance used to adhere materials together

Aggregate: Any granular material including crushed stone, slag, or gravel

Alligatoring: The cracking of surface bitumen on a built-up roof resulting from expansion or contraction

Application Rate: The quantity (measured in mass, volume, or thickness) of material applied per unit area

Asphalt: A brownish-black mixture of bitumens obtained from nature or through petroleum processing


Ballast: A material such as aggregate which employs its mass and the force of gravity to hold single-ply roof membranes in place

Base Flashing: Plies or strips of roofing membrane used to seal the roof at the horizontal-to-vertical intersections

Base Ply: The bottommost ply of the roofing membrane

Base Sheet: A material used as the first ply on some low-slope system

Bitumen: A general term for a semi-solid mixture of hydrocarbons

Blister: A raised portion of the roofing membrane resulting from pressure buildup caused by trapped gases in the membrane

Blocking: The wood between the deck and the membrane

Buckling: Warping or wrinkling of the roof membrane


Cant Strip: A beveled strip of wood used under flashings to modify the point at which the roofing or waterproofing membrane meets any vertical element

Cap Sheet: A granule-surfaced felt that is used as the top ply of a built-up roofing membrane

Caulking: A waterproofing sealant used for filling joints

Compressive Strength: A property of a material to resist deformation caused by compression

Condensation: As it relates to water, the conversion of water vapor to a liquid as the temperature drops

Coping: The covering on top of a wall that is exposed to weather

Counterflashing: Metal or elastomeric sheeting secured on or into a wall, curb, pipe, rooftop unit, or other surface to protect the upper edge of the base flashing

Cricket: A small, elevated area used to divert water from a horizontal intersection of the roof with a chimney, wall, expansion joint or other projection

Curb: A raised member used to support roof penetrations

Cure: A process where the material forms a permanent molecular bond after being exposed to a chemicals, heat, or pressure


Dead Level: Absolute horizontal; no slope, flat

Deck: The structural component of the roof of a building to which the waterproofing system is applied

Delamination: Separation of the roofing plies

Dimensional Stability: The change in a material that results from exposure to elevated temperature

Downspout: A vertical pipe for draining water from roof gutters

Drain: An outlet designed to capture or direct the flow of water from a roof

Drip Edge: A metal flashing or other overhanding component intended to control the direction of dripping water


Edge Stripping: Membrane flashing strips used to cover a joint between flashing and built-up roofing

Elastomeric: The elastic rubber-like properties of a material

Elongation: The ability of a roofing material to be stretch by the application of force

Exhaust Ventilation: Air that is vented from the roof cavity

Expansion Joint: A structural separation between two building elements that allows for free movement between the elements to the roofing or waterproofing system


Fabric: A woven cloth composed of filaments, threads or yarns and used to reinforce certain membranes

Fasteners: A wide array of mechanical fastening devices including clips, screws, or bolts

Felt: A fabric manufactured from vegetable, asbestos, or glass fibers in the presence of mechanical work, moisture or heat

Field Seam: A splice or seam made in the field where overlapping sheets are joined together using an adhesive, splicing tape or heat/solvent welding

Fishmouth: A membrane defect caused by wrinkling or shifting of ply sheets; edge wrinkle

Flaking: Detachment of small pieces of the coating

Flashing: Weatherproofing components used to seal roof system edges at perimeters, walls, expansion joints, valleys, drains, and other places

Flood Test: Testing procedure using a controlled amount of water to determine the effectiveness of the waterproofing system


Gauge: A metal thickness measurement

Granule: Aggregate commonly used to surface cap sheets, shingles, and other surfaced roof coverings

Gravel: Coarse, granular aggregate used in a bitumen aggregate on built-up roofs

Gutter: A channeled component used to contain water runoff from the roof to the downspouts


Heat Welding: Method of melting or fusing together sheets of thermoplastic and polymer modified bitumen

Hem: Edge created by folding metal back on itself

HVAC: Heating, ventilating, and air conditioning equipment


Ice Dam: A mass of ice formed near transitions from warm to cold roof surfaces

Infrared Thermography: Roof analysis technique used to measure the temperature gradient of a roof surface to locate areas of moisture

Insulation: Materials used to reduce the flow of heat

Intake Ventilation: Ventilation system that allows for the flow of fresh air into the building


Joist: Timber, metal or wooden beams arranged parallel to each other to support a floor or ceiling


Laminate: To join layers of material together via heat and/or pressure

Lap: The part of a roofing membrane that covers any portion of another section of membrane and is then sealed to form a watertight connect

Low-slope roofs: A category of roofs that have a slope at or less than 3:12 (14 degrees)


Mastic: Adhesive material used as a cementing agent for securing waterproofing membrane

Mat: A thin layer of fiber which reinforces the membrane

Mechanically fastened membrane: Membranes that have been attached at defined intervals to the substrate using fasteners or other mechanical devices

Membrane: A flexible or semi-flexible sheet of thermoset, thermoplastic, or modified bituminous material whose primary function is waterproofing

Modified Bitumen: A bitumen modified by one or more polymers

Mopping: The application of hot bitumen with a mop to the substrate of a bituminous membrane


Nailer: A piece of dimensional lumber or plywood which serves as a receiving medium for the fasteners

Night Seal: A temporary seal used during construction to protect the roofing assembly from water penetration


Open time: The period of time after an adhesive has been applied and an effective bond can be achieved by joining two surfaces

Overflow Drainage: Component of a roof drainage system that protects the roof against damage in the event that the primary drainage system is blocked

Ozone Resistance: A property of a material to resist the effects of ozone exposure


Parapet Wall: Perimeter wall that extends above the roof surface

Partially Attached: A method of roofing assembly in which the membrane has been spot affixed to a substrate using an adhesive or mechanical device

Penetration: Any element (e.g., pipes, conduits, HVAC supports) that pass through the roof

Pigment: A compound used to impart color

Pinhole: A tiny hole in the roof coating, film, foil, membrane or laminate components

Pipe Boot: Pre-fabrications flashing component used to flash around a circular penetration

Pitch Pocket: A flange, open-bottomed metal enclosure placed around a penetration and filled with hot bitumen or flashing cement

Ply: A layer of felt in a built-up roof system

Pond: A surface which is incompletely drained

Positive Drainage: Drainage condition in which all considerations during the design process have been provided to ensure drainage of the roof within 48 hours

Pourable Sealer: A two-part sealer used at difficult-to-flash penetrations

Primer: A substance intended to prepare the roof surface for accepting a coating or improving the overall adhesion of the coating to the substrate

Protection Mat: A mat used to shield or protect one roof system component from another


Re-covering: The process of covering an existing roof system with a new system

Reflectivity: The ability of a material to reflect light and heat

Reinforced Membrane: A membrane reinforced with felts, mats, fabrics, or other fibers

Roof Curb: A raised frame used to mount mechanical units on the roof

Rubber: A material, at room temperatures, is capable of recovering substantially in shape and size from large deformations


Scupper: A drainage component consisting of an outlet through a wall, parapet wall, or raised roof edge lined with a soldered sheet metal sleeve

Sealant: A material that is used as an adhesive to form a seal

Sealant Backing: A material place in a joint before applying sealant

Seam: A joint formed by joining two separate sections of material

Self-Adhering Membrane: A membrane that adheres to the substrate and overlaps without the use of additional adhesive

Shrinkage: A decrease in one or more dimensions of an object

Single-ply membranes: Roof membranes that are applied using just one layer of membrane material

Skylight: An opening in the roof that is glazed with a transparent or translucent material that allows light to diffuse into the space below

Snow load: The load due to the weight of the snow on a roof

Soffit: The exposed undersurface of any exterior overhanging section of a roof eave

Solvent: Any liquid used to dissolve another material

Splice: Joining of overlapping materials

Split: A tear in the membrane resulting from tensile stresses

Steep-Slope Roofs: A category of roofing systems installed on slopes greater than 3:12 (14 degrees)

Surfacing: The top layer of a roof covering


Tear Resistance: The load required to tear a material when the stress is concentration on a small area of the specimen by the introduction of a prescribed flaw

Termination: A method of anchoring the free edges of the membrane to the roofing system

Thermoplastic: A material that softens when heated and hardens when cooled


Ultraviolent: A form of radiation that is potentially damaging to certain chemical compounds in the roofing membrane


Vapor Retarder: Material installed to restrict the flow of water vapor through the roofing assembly

Vegetative Roofs: A roof system composed of a waterproof substrate and an area of planting


Water Absorption: The amount of water absorbed by a material within a specific period of time

Waterproof: A property of a material to resist water

Weep Holes: Small holes whose purpose is to permit drainage of water that accumulates inside a building component

Weld: Joining of metal together by heat fusion

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