Location roof detail fields

Validation rules for fields related to roof details for a location.

Verisk Synergy Studio's individual risk methodology follows a structured, logical approach that groups building characteristics (SRCs) that are supported in a specific model. Refer to the "Secondary Risk Characteristics Matrix"—https://risksolutions.verisk.com/models/landing-pages/secondary-risk-characteristics/—which is available on the landing page on the Client Portal (login required)—that serves as a guide to the SRCs supported by each model. The landing page includes peril-specific SRC documentation. Users may also refer to a model's detailed description (available on the Client Portal).

Secondary risk characteristic Supported country / peril Description Validation rules Default value
Chimney
  • CA EQ
  • HI EQ
  • JP EQ
  • US EQ
One of the following values to indicate whether the building at this location has a chimney and, if so, to describe the height of the chimney:
  • Unknown/default (0)
  • No (1)
  • Yes, height less than 2 feet. (2)
  • Yes, height 2-5 feet. (3)
  • Yes, height more than 5 feet. (4)
Optional
Fire Rating for Roof Covering
  • US WF
  • Unknown/No Rating (0)
  • Fire Rated Class A (1)
  • Fire Rated Class B (2)
  • Fire Rated Class C (3)
Unknown/No Rating (0)
Roof Anchorage
  • US TC
  • US ST
Name of the connection type used to secure the roof to the walls:
  • Unknown/default (0)
  • Hurricane Ties (1)
  • Nails/Screws (2)
  • Anchor bolts (3)
  • Gravity/friction (4)
  • Adhesive epoxy (5)
  • Structurally Connected (6)
  • Clips (7)
  • Double wraps (8)

Roof anchorage establishes a load path to transfer wind loads from the roof to the walls. Hurricane straps provide such an anchorage.

  • Optional
Unknown/default (0)
Roof Condition US TC Overall condition of the roof system
  • Unknown / default (0)
  • Severe - Verisk Score 1 (1)
  • Poor - Verisk Score 2 (2)
  • Fair - Verisk Score 3 (3)
  • Good - Verisk Score 4 (4)
  • Excellent - Verisk Score 5 (5)
Roof Covering
  • US TC
  • US ST
  • US WF
The types of materials used used for covering the roof of a building:
  • Unknown/default (0)
  • Asphalt shingles (1)
  • Wooden shingles (2)
  • Clay/concrete tiles (3)
  • Light metal panels (4)
  • Slate (5)
  • Built-up roof with gravel (6)
  • Single-ply membrane (7)
  • Standing seam metal roofs (8)
  • Built-up roof without gravel (9)
  • Single-ply membrane ballasted (10)
  • Hurricane wind-rated roof coverings (11)
  • Photovoltaic shingles (12)

Damage to the roof covering can result in significant water damage to the interior of the building and contents.

  • Optional
Unknown/default (0)
Roof Covering Attachment
  • HI TC
  • US TC
  • US ST
One of the following values to describe the type of connections used to secure the roof covering to the roof deck of the building at this location:
  • Unknown/default (0)
  • Screws (1)
  • Nails/staples (2)
  • Adhesive/epoxy ()
  • Mortar (4)
  • High wind attachment (5)

Damage to the roof can result due to the improper attachment of the roof covering to the underlying roof deck.

  • Optional
Unknown/default (0)
Roof Deck
  • CA EQ
  • HI EQ
  • HI TC
  • JP EQ
  • NZ EQ
  • US EQ
  • US TC
  • US ST
One of the following values to describe the material used and the construction type of the roof deck of the building at this location:
  • Unknown/default (0)
  • Plywood (1)
  • Wood planks (2)
  • Particle board/OSB (3)
  • Metal deck with insulation board (4)
  • Metal deck with concrete (5)
  • Pre-cast concrete slabs (6)
  • Reinforced concrete slabs (7)
  • Light metal (8)
  • Batten decking (9)

Roof decks transfer the roof loads to the underlying joists and purlins. Damage to the roof deck results in the breach of the building envelope, resulting in significant building and interior damage.

With respect to seismic performance, the weight of the roof can be critical. It is not desirable to make the roof heavy because it induces higher lateral forces in the structure during shaking.

  • Optional
Unknown/default (0)
Roof Deck Attachment
  • US TC
  • US ST
One of the following values to describe the type of connections used to secure the roof deck to the underlying roof support system of the building at this location:
  • Unknown/default (0)

  • Screws/bolts (1)
  • Nails (2)
  • Adhesive/epoxy (3)
  • Structurally connected (4)
  • 6d nails @ 6 spacing, 12 on center (5)
  • 8d nails @ 6 spacing, 12 on center (6)
  • 8d nails @ 6 spacing, 6 on center (7)
  • 8d RS nails @ 4" spacing, 4"

Damage to the roof can result as a result of improper attachment of the roof deck to the underlying roof support system.

  • Optional
Unknown/default (0)
Roof Flashing Compliance US TC
  • Unknown / NA (0)
  • Flashing IBC - Compliant (RAS 111, or ES1) (1)
  • Flashing Not IBC Compliant (2)
Roof Geometry
  • HI TC
  • US TC
  • US ST
  • US WF
One of the following values to describe the shape of the roof of the building at this location:
  • Unknown/default (0)
  • Flat (1)
  • Gable end without bracing (2)
  • Hip (3)
  • Complex (4)
  • Stepped (5)
  • Shed (6)
  • Mansard (7)
  • Gable end with bracing (8)
  • Pyramid (9)
  • Gambrel (10)

The geometry of the roof affects the intensity of wind pressures and the resulting uplift resistance.

  • Optional
Unknown/default (0)
Roof Hail Impact Resistance
  • US ST
One of the following values to describe the class of the hail impact-resistant roof covering material for the building at this location, based on UL2218, Impact Resistance of Prepared Roof Covering Materials :
  • Unknown/Non-impact-resistant (0)
  • Impact-resistant A (1) (least impact-resistant)
  • Impact-resistant B (2)
  • Impact-resistant C (3)
  • Impact-resistant D (4) (most impact-resistant)

This field only applies to the hail sub-peril.

UL2218 defines four classes of prepared sheets of panels installed in overlapping rows on roofs.

Optional
Roof Mounted Solar US TC
  • Unknown / None (0)
  • Solar Panel Array (mechanically attached) (1)
  • Solar Panel Array (ballasted (1)
Roof Overhang
  • US WF
  • Unknown/Default (0)
  • No Overhang (1)
  • Overhang/Rake (8-36 in. (2)
  • Overhang/Rake (<8 in. (3)
  • Overhang/Rake (>36 in. (4)
Unknown/Default (0)
Roof Pitch
  • HI TC
  • US TC
  • US STl
One of the following values to describe the slope of the roof of the building at this location:
  • Unknown/default (0)
  • Low (less than 10°) (1)
  • Medium (10° to 30°) (2)
  • High (more than 30°) (3)

Low-pitch roofs have greater uplift forces acting on the roof as compared to high-pitch roofs.

  • Optional
Unknown/default (0)
Roof Top Equipment US TC
  • Unknown (0)
  • None (1)
  • A/C units - adequate fastening (2)
  • A/C units - inadequate fastening (3)
  • Other mechanical equipment - adequate fastening (4)
  • Other mechanical equipment - inadequate fastening (5)
Roof Underlayment US TC
  • Unknown (0)
  • No underlayment or secondary water resistance (1)
  • Secondary water resistance barrier (2)
  • Single layer membrane/fabric underlayment ASTM D226 Type 1 (3)
  • Single layer membrane/fabric underlayment ASTM D226 Type 2 (4)
  • Secondary water resistance and single layer membrane (5)
  • Fully sealed roof deck (6)
Roof Vent Size
  • AU WF
  • US WF
  • Unknown/Default (0)
  • ⅛ " or Smaller Mesh or Wildfire Resistant (1)
  • ¼" or No Mesh (2)
Unknown/Default (0)
Roof Vents
  • AU WF)
  • US WF
  • Unknown/Default (0)
  • No Roof Vents (1)
  • Roof Vents (Turbines, Goose Neck, Ridge Vents, Etc. (2)
Unknown/Default (0)
Roof Year Built
  • HI TC
  • US TC
  • US ST
Year in which the roof of the building at this location was built

A value of 0 for this field in your import data represents Unknown/default.

With age, roofs lose their strength to resist wind loads and hence are more vulnerable.

  • Optional
  • Can be a numeric value between 1000 and the current year, inclusive (with a maximum year of 2100)
Blank
Skylight
  • US WF
  • Unknown/Default - Fixed (0)
  • No Skylights (1)
  • Operable (2)
Unknown/Default (0)
Soffits
  • US WF
  • Unknown/Default (0)
  • No Soffit (1)
  • Soffit, Aluminum/Vinyl, Designed for Wind Loads (2)
  • Soffit, Aluminum/Vinyl, Not Designed for Wind Loads (3)
  • Soffit, Other, Designed for Wind Loads (4)
  • Soffit, Other, Not Designed for Wind Loads (5)
Unknown/Default (0)
Tank
  • CA EQ
  • HI EQ
  • JP EQ
  • US EQ
One of the following values to indicate whether there are rooftop tanks on the higher buildings adjoining the building at this location:
  • Unknown/default (0)
  • No (1)
  • Yes (2)

Rooftop tanks on adjoining, higher buildings are a falling hazard during earthquakes.

Optional