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| Know Your Roofing |
Affordable
Arf-fordable
A better deal for the money.
.Asphalt
An organic bituminous compound used in the manufacturing of composition
shingles.
Asphalt Roofing Cement
Used to bond roofing materials, also known as flashing cement or mastic.
ASTM - American Society for testing of Materials
A voluntary organization concerned with the development of standards, testing
procedures, and specifications. Many city building codes use ASTM standards.
Base Flashing
The portion of the flashing which is attached to, or rest on the roof deck.
Blend
Mixtures of various colored granules on the surface of shingles.
Blind Nailing
Nails driven in such a way that the heads are concealed by succeeding layers of
roofing materials.
Blisters
Bubbles that may appear on the surface of asphalt roofing.
Bridging
A method of re-roofing where the new shingles follow the contour of the old roofing.
Also called "butting up". It is almost always desirable to tear off old roofing.
Built-Up Roofing
A flat or low sloped roof made up of layers of asphalt and ply sheets. (AKA BUR)
Butt
The portion of the shingle exposed to the weather, sometimes called the "tab" of the
shingle.
Cant Strip
A 45 degree beveled wood, fiberboard, or metal strips at the junction of the roof and a
vertical surface used to break a right angle. Primarily used in low sloped roofing.
Cap Flashing
Flashing on a vertical surface to prevent the flow of water from getting behind the
base flashing. The cap flashing overlaps the base flashing. This flashing (AKA
counter flashing) is generally not changed in a re-roofing job.
Caulk
A substance used to fill a joint or void.
Cement
A substance, when cured, binds to surfaces together.
Class "A"
The highest fire resistance rating for roofing as per ASTM E-108. Shingle with this
rating should withstand severe exposure to fire from sources originating outside the
building. Other classes are B and C.
Closed Valley
When roofing materials cover the entire valley.
Coating
A layer of viscous asphalt applied to shingles in which granules are embedded.
Collars
Pre-formed flange placed over a vent pipe (AKA vent sleeve). There are two types,
lead jacks and rubber boots.
Counter Flashing
See Cap Flashing.
Course
A horizontal unit of roofing running the length of the roof.
Cricket
A small peaked saddle constructed on the top of the basic roof and behind the
chimney. A cricket is generally not required.
Cupola
A structure rising above the main roof. It is usually ornamental, but may be used for
ventilation.
Dead Level
A roof or section of roof without any pitch.
Deck/ Decking
The material installed over the framing of a structure on which shingles are installed.
The primary materials are Oriented Stran Board (OSB) and CDX Plywood.
Double Coverage
A method of applying roof shingles so that two complete layers of material are
provided.
Dormer
A window unit projecting through the sloping plane of the roof.
Drip Edge
Usually metal strip used on eves and rakes to allow for water run off without
damaging underlying materials.
Drip Course
The first course of shingles that slightly overhangs the edge.
Eave
The horizontal edge of a roof that projects over the outside wall.
Exposure
The portion of the shingle that is exposed to the weather. Usually measured from the
butt of one shingle to the butt of the next overlapping shingles.
Lap
The overlap of surface of one roofing material to another.
Laminated Shingles
Shingles containing more than one layer of tabs creating extra thickness.
(dimensional or architectural)
Lock Shingles
A shingles with a mechanical locking feature. These are not common.
Low Slope Application
Method of applying shingles on slopes between 2 and 4 inches per foot.
Mansard Roof
A vertical portion of roofing.
Mastic
See asphalt roofing cement.
Nesting
See bridging.
Normal Slope Application
Method of installing shingles between 4 and 21 inches per foot.
Open Valley
Valley in which metal is used and roofing material does not cover entire valley area
as in a Closed Valley.
Saturant
Asphalt used to impregnate felt for waterproofing and strength.
Seal Down
A factory applied asphalt strip used to bond a shingle to the one above. This is used
to provide wind resistance.
Sheathing
Exterior grade boards used as a roof deck.
Side Lap
A horizontal lap.
Slope
The degree of incline of a roof plane.
Soffit
The finished underside of an eave.
Soil Stack
A vent pipe that penetrates the roof.
Span
The horizontal measurement from eave to eave.
Spire
A tower of roof tapering up to a point.
Square
A unit of roof measurement covering 100 square feet.
Square Butt Shingles
Generally three tab 20 year shingles - not laminated.
Starter Course
The first course of shingles installed on your roof. It will be under the first exposed
row. Often these shingles are 20 year three tab shingles. So as to not create an
awkward hump, these are used even when heavier laminated shingles are installed.
Step Flashing
Flashing along a roof slope against a wall or chimney using succeeding courses of
flashing material placed in conjunction with layers or courses of roofing materials..
Tab
Portion of strip shingles defined by cut outs or slots so when installed, material
appears to be individually applied.
Underlayment
An asphalt saturated felt applied over the roof deck and under the roofing material.
Valley
The intersection of two roof slopes.
Vent
An outlet for air.
Weathering
Changes in color, texture or efficiency brought about by exposure to outside
elements.
Arf-fordable
A better deal for the money.
.Asphalt
An organic bituminous compound used in the manufacturing of composition
shingles.
Asphalt Roofing Cement
Used to bond roofing materials, also known as flashing cement or mastic.
ASTM - American Society for testing of Materials
A voluntary organization concerned with the development of standards, testing
procedures, and specifications. Many city building codes use ASTM standards.
Base Flashing
The portion of the flashing which is attached to, or rest on the roof deck.
Blend
Mixtures of various colored granules on the surface of shingles.
Blind Nailing
Nails driven in such a way that the heads are concealed by succeeding layers of
roofing materials.
Blisters
Bubbles that may appear on the surface of asphalt roofing.
Bridging
A method of re-roofing where the new shingles follow the contour of the old roofing.
Also called "butting up". It is almost always desirable to tear off old roofing.
Built-Up Roofing
A flat or low sloped roof made up of layers of asphalt and ply sheets. (AKA BUR)
Butt
The portion of the shingle exposed to the weather, sometimes called the "tab" of the
shingle.
Cant Strip
A 45 degree beveled wood, fiberboard, or metal strips at the junction of the roof and a
vertical surface used to break a right angle. Primarily used in low sloped roofing.
Cap Flashing
Flashing on a vertical surface to prevent the flow of water from getting behind the
base flashing. The cap flashing overlaps the base flashing. This flashing (AKA
counter flashing) is generally not changed in a re-roofing job.
Caulk
A substance used to fill a joint or void.
Cement
A substance, when cured, binds to surfaces together.
Class "A"
The highest fire resistance rating for roofing as per ASTM E-108. Shingle with this
rating should withstand severe exposure to fire from sources originating outside the
building. Other classes are B and C.
Closed Valley
When roofing materials cover the entire valley.
Coating
A layer of viscous asphalt applied to shingles in which granules are embedded.
Collars
Pre-formed flange placed over a vent pipe (AKA vent sleeve). There are two types,
lead jacks and rubber boots.
Counter Flashing
See Cap Flashing.
Course
A horizontal unit of roofing running the length of the roof.
Cricket
A small peaked saddle constructed on the top of the basic roof and behind the
chimney. A cricket is generally not required.
Cupola
A structure rising above the main roof. It is usually ornamental, but may be used for
ventilation.
Dead Level
A roof or section of roof without any pitch.
Deck/ Decking
The material installed over the framing of a structure on which shingles are installed.
The primary materials are Oriented Stran Board (OSB) and CDX Plywood.
Double Coverage
A method of applying roof shingles so that two complete layers of material are
provided.
Dormer
A window unit projecting through the sloping plane of the roof.
Drip Edge
Usually metal strip used on eves and rakes to allow for water run off without
damaging underlying materials.
Drip Course
The first course of shingles that slightly overhangs the edge.
Eave
The horizontal edge of a roof that projects over the outside wall.
Exposure
The portion of the shingle that is exposed to the weather. Usually measured from the
butt of one shingle to the butt of the next overlapping shingles.
Lap
The overlap of surface of one roofing material to another.
Laminated Shingles
Shingles containing more than one layer of tabs creating extra thickness.
(dimensional or architectural)
Lock Shingles
A shingles with a mechanical locking feature. These are not common.
Low Slope Application
Method of applying shingles on slopes between 2 and 4 inches per foot.
Mansard Roof
A vertical portion of roofing.
Mastic
See asphalt roofing cement.
Nesting
See bridging.
Normal Slope Application
Method of installing shingles between 4 and 21 inches per foot.
Open Valley
Valley in which metal is used and roofing material does not cover entire valley area
as in a Closed Valley.
Saturant
Asphalt used to impregnate felt for waterproofing and strength.
Seal Down
A factory applied asphalt strip used to bond a shingle to the one above. This is used
to provide wind resistance.
Sheathing
Exterior grade boards used as a roof deck.
Side Lap
A horizontal lap.
Slope
The degree of incline of a roof plane.
Soffit
The finished underside of an eave.
Soil Stack
A vent pipe that penetrates the roof.
Span
The horizontal measurement from eave to eave.
Spire
A tower of roof tapering up to a point.
Square
A unit of roof measurement covering 100 square feet.
Square Butt Shingles
Generally three tab 20 year shingles - not laminated.
Starter Course
The first course of shingles installed on your roof. It will be under the first exposed
row. Often these shingles are 20 year three tab shingles. So as to not create an
awkward hump, these are used even when heavier laminated shingles are installed.
Step Flashing
Flashing along a roof slope against a wall or chimney using succeeding courses of
flashing material placed in conjunction with layers or courses of roofing materials..
Tab
Portion of strip shingles defined by cut outs or slots so when installed, material
appears to be individually applied.
Underlayment
An asphalt saturated felt applied over the roof deck and under the roofing material.
Valley
The intersection of two roof slopes.
Vent
An outlet for air.
Weathering
Changes in color, texture or efficiency brought about by exposure to outside
elements.
Arf-fordable Roofing Contractor
