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FORTIFIED Home Sealed Roof Deck - Material Options for Taping the Roof Deck Seams

Author(s)

Insurance Institute for Business and Home Safety

Organization(s)

IBHS

Publication Date

February, 2015

Checklist providing options and a guide for taping roof deck seams.

Porches, Carports, and Deck Attachments

Guide describing how to provide a continuous load path with appropriate connectors to improve the wind resistance of attached porches, carports, and decks during high-wind events.

Good Deck Design and Construction

Publication Date

Wed, 12/01/2010 - 12:00

FORTIFIED Home Sealed Roof Deck Supplemental Deck Attachment - Using 2-Part Closed-Cell Foam Adhesive

Author(s)

Insurance Institute for Business and Home Safety

Organization(s)

IBHS

Publication Date

April, 2015

Checklist providing information on strengthening the attachment of roof sheathing and installation of a sealed roof deck system using a spray polyurethane foam adhesive.

Seal the roof deck as follows: Sweep roof decking, tape seams, and cover underlayment or roofing felt as shown.

Publication Date

Wed, 12/01/2010 - 12:00

Installation sequence for deck ledger flashing.

Publication Date

Wed, 12/01/2010 - 12:00

Deck ledger flashing and fastener details.

Publication Date

Wed, 12/01/2010 - 12:00

Roof Deck Sheathing and Sealing for Sloped Roofs

Guide describing requirements for sheathing and sealing the roof decking in accordance with the requirements of the IBHS Fortified Home Program's Hurricane and High Wind Standards, and other roofing considerations to increase the roof's disaster resistance.

Right – Seams in the deck sheathing are sealed with tape

FORTIFIED Home Sealed Roof Deck - Installation of 2 Layers of #30 Felt as a Qualified Sealed Roof Deck System for Asphalt Shingle or Metal Roofing

Author(s)

Insurance Institute for Business and Home Safety

Organization(s)

IBHS

Publication Date

January, 2015

Checklist providing the type of roofing felt recommended by IBHS as a quilified sealed roof deck system for asphalt shingle or metal roofing.

Wrong - The decks of this home suffered considerable hurricane damage.

Reference

Coastal Construction Manual - Principles and Practices of Planning, Siting, Designing, Constructing, and Maintaining Residential Buildings in Coastal Areas, Fourth Edition, Volume II, FEMA P-55

Author(s)

Coulbourne William,

Jones Christopher P,

Kapur Omar,

Koumoudis Vasso,

Line Philip,

Low David K,

Overcash Glenn,

Passman Samantha,

Reeder Adam,

Seitz Laura,

Smith Thomas,

Tezak Scott

Organization(s)

Federal Emergency Management Agency,

FEMA,

Applied Technology Council,

ATC,

URS Group,

DK Low and Associates,

Atkins,

TLSmith Consulting

Volume II of a two-volume report providing a comprehensive approach to design, construction, and renovation of homes located in coastal environments.

Publication Date

Mon, 08/01/2011 - 12:00

Right - The porch and deck of this coastal home survived a hurricane.

Reference

Coastal Construction Manual - Principles and Practices of Planning, Siting, Designing, Constructing, and Maintaining Residential Buildings in Coastal Areas, Fourth Edition, Volume II, FEMA P-55

Author(s)

Coulbourne William,

Jones Christopher P,

Kapur Omar,

Koumoudis Vasso,

Line Philip,

Low David K,

Overcash Glenn,

Passman Samantha,

Reeder Adam,

Seitz Laura,

Smith Thomas,

Tezak Scott

Organization(s)

Federal Emergency Management Agency,

FEMA,

Applied Technology Council,

ATC,

URS Group,

DK Low and Associates,

Atkins,

TLSmith Consulting

Volume II of a two-volume report providing a comprehensive approach to design, construction, and renovation of homes located in coastal environments.

Publication Date

Mon, 08/01/2011 - 12:00

Below Deck Spray Foam Insulation for Existing Roofs

Guide describing how to add spray foam insulation to the underside of the existing roof deck as part of the conversion of a vented attic to an unvented, insulated attic.

Inside FORTIFIED: Installing Sealed Roof Deck with Self-Adhered Underlayment

Publication Date

November, 2018

Video showing how to correctly install sealed roof deck with self-adhered underlayment in accordance to IBHS Fortified Home protocols.

Hurricane-New Construction Roof Deck Attachment, Structural Wood Panels

FORTIFIED Home Fastening Roof Sheathing Over Existing 1x Roof Deck Boards

Author(s)

IBHS Fortified Home

Organization(s)

IBHS

Publication Date

November, 2019

Factsheet describing ways to install sheathing over existing 1x roof decking.

Unvented Conditioned Attic with Spray Foam Insulation Below Roof Deck

Guide describing a method for insulating an unvented attic by spraying foam insulation along the underside of the roof deck.

Wrong - Roof deck sheathing nails missed the trusses, potentially weakening the roof in high winds.

Publication Date

Sun, 03/07/2021 - 12:00

Porches and decks appear to be structurally sound after a hurricane despite damage to other portions of the houses.

Reference

Coastal Construction Manual - Principles and Practices of Planning, Siting, Designing, Constructing, and Maintaining Residential Buildings in Coastal Areas, Fourth Edition, Volume II, FEMA P-55

Author(s)

Coulbourne William,

Jones Christopher P,

Kapur Omar,

Koumoudis Vasso,

Line Philip,

Low David K,

Overcash Glenn,

Passman Samantha,

Reeder Adam,

Seitz Laura,

Smith Thomas,

Tezak Scott

Organization(s)

Federal Emergency Management Agency,

FEMA,

Applied Technology Council,

ATC,

URS Group,

DK Low and Associates,

Atkins,

TLSmith Consulting

Volume II of a two-volume report providing a comprehensive approach to design, construction, and renovation of homes located in coastal environments.

Publication Date

Mon, 08/01/2011 - 12:00

Right - Use flood-damage-resistant materials for decks and portions of the house below the design flood elevation.

Publication Date

Tue, 01/01/2019 - 12:00

The components of a roof include the rafter framing or trusses, purlins, plywood roof decking, underlayment, and the roof covering.

Publication Date

Tue, 01/01/2019 - 12:00

FORTIFIED Home Installation of 2 Layers of #30 Felt as a Qualified Sealed Roof Deck System for Asphalt Shingle or Metal Roofing

Author(s)

Insurance Institute for Business and Home Safety

Organization(s)

IBHS

Publication Date

January, 2015

Checklist providing information on how and when to install solid sheathing over spaced deck boards on homes located in areas that use the FORTIFIED Home™–High Wind standards.

FORTIFIED Home ASTM D6757 - An Alternative to #30 Felt Underlayment: Sealed Roof Deck Underlayment Alternative

Author(s)

Insurance Institute for Business and Home Safety

Organization(s)

IBHS

Publication Date

February, 2019

Fact sheet describing the acceptable underlayment alternatives including ASTM D6757 Underlayment Felt Containing Inorganic Fibers for Steep-Slope Roofing for certain applications.

Wrong – Roof underlayment is not fully adhered and roof deck seams are not sealed so roof is susceptible to high-wind events

Right – Roof underlayment is fully adhered and roof deck seams are sealed so roof is resistant to high-wind events

Low-slope roof assemblies constructed of two deck sheathing layers sandwiching rigid foam, and topped with mechanically fastened membrane

Continuous load path failure due to improper connections between the roof decking and roof framing resulting from hurricane force winds.

Reference

Coastal Construction Manual - Principles and Practices of Planning, Siting, Designing, Constructing, and Maintaining Residential Buildings in Coastal Areas, Fourth Edition, Volume II, FEMA P-55

Author(s)

Coulbourne William,

Jones Christopher P,

Kapur Omar,

Koumoudis Vasso,

Line Philip,

Low David K,

Overcash Glenn,

Passman Samantha,

Reeder Adam,

Seitz Laura,

Smith Thomas,

Tezak Scott

Organization(s)

Federal Emergency Management Agency,

FEMA,

Applied Technology Council,

ATC,

URS Group,

DK Low and Associates,

Atkins,

TLSmith Consulting

Volume II of a two-volume report providing a comprehensive approach to design, construction, and renovation of homes located in coastal environments.

Publication Date

Mon, 08/01/2011 - 12:00

Right – The roof membrane is fully adhered and deck seams are sealed so the membrane will not flutter and fail due to negative pressure from high winds

Right – Closed-cell polyurethane foam is sprayed on the underside of the roof deck to provide structural connections and seal seams in the sheathing to increase wind resistance

Right - Metal drip edge on this south Florida CMU home protects the top of the fascia and edge of the roof deck from water, wind-blown rain and embers, and insects.

Publication Date

Tue, 06/01/2021 - 12:00

Wrong – If roof membrane is not fully adhered, it can flutter and fail due to negative pressure from wind above and positive pressure from air leakage through roof deck below

This roof was constructed to meet the IBHS Fortified Roof standard by sealing the decking seams with flashing tape, installing synthetic roof underlayment secured with metal drip edge and nailed every six inches, and using self-adhered starter shingles.

Publication Date

Thu, 08/17/2023 - 12:00

Wrong – This roof membrane on a low slope roof is fluttering and may fail because it is not fully adhered and deck seams below are not sealed, allowing air to leak up into the assembly while the membrane is pulled up due to negative pressures from wind

Unvented Insulated Sloped Roofs

Guide describing construction of sloped roofs that are unvented and are insulated above the roof deck.

Low-Slope ("Flat") Roofs

A guide describing how to install low-sloped ("flat") roofs with insulation above the roof deck that resist wind pressures during high-wind events.

Roof Valleys and Penetrations Sealed

Guide describing how to seal roof valleys and how to seal around pipes, chimneys, and other roof deck penetrations.

Vented versus Unvented Attic

Guide describing options for designing and locating the thermal boundary at either the attic floor or along the roof line in new and existing homes.

Hurricanes and High Winds Overview

Overview guide outlining home construction techniques used in hurricane and high wind areas.

Clay or Concrete Tile Roofs

Guide discussing disaster resistance related to clay or concrete tile roofing when installing roofing on new construction or when repairing or replacing roofing on existing homes.

Metal Roofs

Guide discussing disaster resistance related to metal roofing when installing roofing on new construction or when repairing or replacing roofing on existing homes.

FORTIFIED Roof System - Hurricane

Publication Date

December, 2014

Animated video showing how to properly apply roof decks in hurricane regions according to IBHS practices.

Inside FORTIFIED: Sealing Roof Seams with Tape

Publication Date

May, 2018

Video showing how to seal the roof deck with tape per IBHS Fortified Requirements.

Framing of Gable Roof Overhangs

Guide describing construction of gable roof overhangs to resist uplift pressures in high winds.

Inside FORTIFIED: Fastening Sheathing on Existing Roofs in Hurricane Areas

Publication Date

May, 2018

Video showing how to correctly install sheathing on existing roof deck in hurricane regions in accordance with IBHS Fortified Home practices.

Roof Edge Protection

Guide describing designs and construction retrofits for roof assemblies to resist pressures at roof edges during high-wind events.

FORTIFIED Home Selection & Installation of Metal Roof Panels - Metal Panel Roof Covering: Guidance on Selection, Installation and Documentation

Author(s)

Insurance Institute for Business and Home Safety

Organization(s)

IBHS

Publication Date

January, 2019

Checklist providing selection and installation guidance for residential, non-structural metal roof systems installed over wood roof decks with a roof slope 2:12 or greater to comply with section R905.1 of the 2015 IRC for a FORTIFIED Roof – New Roof Designation.

Inside FORTIFIED: Installing Underlayment Over Taped Seams

Publication Date

May, 2018

Video showing how to install synthetic underlayment over taped seams on roof deck per IBHS Fortified requirements.