NRCA Technical Update

Maciek Rupar, NRCA Technical Services Director

TARC Summer Convention

Thursday, June 2, 2016

Destin, FL

Agenda

• Code update

• New NRCA recommendations for polyisocyanurate

roof insulation R-value

• NRCA polyisocyanurate insulation testing update

• Rules for commercial use of Unmanned Aerial

Systems

• Technical Resources for NRCA members

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Tennessee Code Adoptions

Commercial Building

• IBC, 2006 Edition except Chapter 11 (accessibility) and

Chapter 27 (electrical)

Energy

• IECC, 2006 Edition

• ASHRAE 90.1, 2007 Edition for State buildings

Residential Building

• IRC, 2009 Edition

Energy

• IRC, 2009 Edition, Chapter 11

OR

• IECC, 2006 Edition

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NRCA maintains a list of state adoptions at

www.nrca.net/technical/EnergyCodes

ASHRAE/IECC Climate Zones

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IECC Roof Insulation Requirements Minimum thermal insulation for roof assemblies

IECC

revision

Climate

Zone

Commercial and Group R Residential

Insulation

entirely

above deck

Metal

buildings

Attic and

other

Ceiling

R-value

2006 3 R-15ci R-19 R-30 30

4 R-15ci R-19 R-30 38

2009 3 R-20ci R-13+R-13|R-19 R-38 30

4 R-20ci R-13+R-13|R-19 R-38 38

2012 3 R-20ci R-19+R-11LS R-38 38

4 R-25ci R-19+R-11LS R-38 49

2015 3 R-25ci R-19+R-11LS R-38 38

4 R-30ci R-19+R-11LS R-38 49

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IECC Roof Reflectance Requirements

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For roofs with slopes < 2:12 directly above cooled conditioned

spaces in Climate Zones 1-3:

IECC

revision Minimum Roof Reflectance and Emittance Options

2012

Three-year aged solar reflectance of 0.55 and three-

year aged thermal emittance of 0.75

Initial solar reflectance of 0.70 and initial thermal

emittance of 0.75

Three-year aged solar reflectance index of 64

Initial solar reflectance index of 82

IECC

revision Minimum Roof Reflectance and Emittance Options

2015

Three-year aged solar reflectance of 0.55 and three-

year aged thermal emittance of 0.75

Initial solar reflectance of 0.70 and initial thermal

emittance of 0.75

Three-year aged solar reflectance index of 64

Initial solar reflectance index of 82

IECC Air Barrier Requirements

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IECC

revision Requirements Applicable to Commercial Building Roof Assemblies

2012

"A continuous air barrier shall be provided throughout the building

thermal envelope…except… in buildings located in Climate Zones 1, 2

and 3."

Three compliance options:

(1) Use tested materials with air impermeability ≤ 0.004 cfm/ft2 (BUR,

mod-bit roof membranes, adhered single-ply roof membranes and

SPF are deemed to comply)

(2) Use tested assemblies with average air leakage rate ≤ 0.04 cfm/ft2

(3) Test the whole building: air leakage rate ≤ 0.40 cfm/ft2

Code does not distinguish between new construction and existing

buildings.

IECC

revision Requirements Applicable to Commercial Building Roof Assemblies

2015

"A continuous air barrier shall be provided throughout the building

thermal envelope…except… in buildings located in Climate Zones 1, 2

and 3 Zone 2B."

Three compliance options:

(1) Use tested materials with air impermeability ≤ 0.004 cfm/ft2 (BUR,

mod-bit roof membranes, adhered single-ply roof membranes and

SPF are deemed to comply)

(2) Use tested assemblies with average air leakage rate ≤ 0.04 cfm/ft2

(3) Test the whole building: air leakage rate ≤ 0.40 cfm/ft2

Code does not distinguish between new construction and existing

buildings. Roof recover and roof replacement are exempt where

alterations to the walls are not also being done at the same time.

New NRCA Recommendations for

Polyisocyanurate Roof Insulation R-value

NRCA testing conducted in 2009 and 2014 resulted in NRCA recommending different in-service R-values for heating and cooling climates.

These R-values appeared in

The NRCA Roofing Manual:

Membrane Roof Systems—2011

and

The NRCA Roofing Manual:

Membrane Roof Systems—2015

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New NRCA Recommendations for

Polyisocyanurate Roof Insulation R-value

In January 2016, NRCA revised its polyisocyanurate R-value recommendations for roof assembly designers:

• Use an in-service design R-value of 5.0 per inch thickness of polyisocyanurate for all climates

• Specify insulation by its thickness, not its R-value “New polyisocyanurate R-values, “ Industry Issue Update, January 2016

The NRCA Roofing Manual: Membrane Roof Systems—2015 (January 2016 Update)

NRCA’s recommendation is based on our own testing and replicate testing conducted by:

• Building Science Corp.

• RDH Building Engineering, Ltd. 9

NRCA’s Polyisocyanurate R-value Testing

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0

1

2

3

4

5

6

7

25 F 40 F 75 F 110 F

R-v

alue

Mean temperature

Published LTTR 2009 Published LTTR 2015

NRCA’s 2009 testing

ASTM C1289 R-values

NRCA’s 2015 testing

NRCA’s 2015 Polyiso Physical

Property Testing

Purpose

Analyze critical physical properties of faced

polyisocyanurate insulation products and

compare results to the applicable ASTM

product standard and past test results.

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Past Polyiso Testing by NRCA

2002 testing:

• HCFC-141b blowing agent

• Hydrocarbon-based blowing agent (current)

2009 testing:

• Hydrocarbon-based blowing agent (current)

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NRCA’s 2015 Polyiso Testing

Physical properties of 5 paper-faced and 2 coated-

glass faced 2-inch-thick products that were tested:

• Density (not in ASTM C1289)

• Compressive strength

• Dimensional stability

• Flexural strength

• Tensile strength

• Knit line assessment (not in ASTM C1289)

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NRCA’s 2015 Polyiso Test Results

The good news

o Apparent foam core density values similar to 2009, slightly

lower than 2002 values (Density measurement is not part

of ASTM C1289)

o Values for compressive strength with facers complied with

Grade 2 (20 psi); one complied with Grade 3 (25 psi);

overall lower values as compared to 2002 and 2009

o Flexural and tensile—All well in excess of ASTM C1289

minimum requirements.

“Another Round,” Professional Roofing, February 2016 14

NRCA’s 2015 Polyiso Test Results

The not so good news

oDimensional stability: Five of seven did not

comply. In 2002 and 2009 only one product did

not comply.

o Knit line depressions exceeded 1/8 in. for three

products.

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Dimensional Stability Test Results

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Dimensional (in)stability – “edge growth”

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View from board topside (top facer) looking down

Knit Line Measurement Results

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Knit line depressions—”rutting”

19 Adhered single-ply membrane

Dimensional stability and knit line depressions

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As delivered by manufacturer

Dimensional stability and knit line depressions

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Knit line and V-groove close-up (after conditioning)

NRCA’s 2015 Polyiso Test Results

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Conclusions • Only 2 of the 7 products tested comply with ASTM

C1289

• Revisions to ASTM C1289 are needed o Address knit lines and “rutting”

NRCA has already met with several polyisocyanurate insulation manufacturers… and we look forward to constructive individual manufacturers at ASTM International and elsewhere in the industry to address these issues.

Unmanned Aircraft Systems (UAS) First, some definitions (from FAA’s website)—

NAS – National Airspace System; U.S. airspace

PIC – Pilot in Command; person with final authority and responsibility for

the operation and safety of the flight

Section 333 Grant of Exemption – current process for FAA approval of civil

UAS operation in U.S. airspace [Section 333 of the FAA

Modernization and Reform Act of 2012, aka Public Law 112-95]

sUAS – Small Unmanned Aircraft System; where the UA weighs less than

55 pounds fully loaded at takeoff

UA – Unmanned Aircraft; the flying portion of the system

UAS – Unmanned Aircraft System; vehicle and all of the associated

support equipment necessary to operate the unmanned aircraft

VLOS – visual line-of-sight 23

Timeline of UAS integration into NAS 2012 – FAA Modernization and Reform Act of 2012. Congress

directs the FAA to adopt specific rules for sUAS integration into

the NAS by September 2015.

2013 – FAA UAS test centers announced. First exemptions granted

for commercial UAS use.

Sept. 2014 – FAA creates a process for Section 333 grants*

Feb 15, 2015 – FAA sUAS Notice of Proposed Rulemaking opened

for 60 days of comment. NRCA submitted comments to FAA.

March 2015 – FAA policy expedites Section 333 grants for flights

below 200 feet (blanket COA policy)

March 2016 – FAA blanket COAs for flights at or below 400 feet

—Final FAA rules for sUAS operations expected in June 2016— 24

Current Method for FAA Approval:

Section 333 Grant of Exemption • Exemption from airworthiness certification required under

U.S.C. Title 49, Section 44704

o Granted on a case-by-case basis

o Interim measure until FAA issues the final sUAS Rule

• Other requirements still apply when granted a Section 333 exemption: o Licensed pilot

o Approved and registered aircraft

o Conditions of operational approval [Include blanket FAA Certificate of Waiver or Authorization (COA) issued with each Section 333 Grant of Exemption]

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Current Method for FAA Approval:

Section 333 Exemption Key conditions attached to currently granted exemptions for sUAS operation:

(1) PIC (Pilot in Command) must hold a pilot certification

(2) sUA must be operated at no more than 400 ft and 100 mph airspeed

(3) sUA must be operated within VLOS of PIC and close enough to be seen by PIC at all times unaided

(4) sUA operations ma not be conducted during night

(5) sUA must be operated at least 500 feet from non-participating persons, vehicles and structures*

(6) sUA must not be operated within 5 nautical miles of an airport reference point†

(7) A Plan of Activities must be submitted to the local Flight Standards District Office at least 72 hours before flight operations

(8) …the point is: Need a licensed pilot familiar with FAA procedures 26

Current Method for FAA Approval:

Section 333 Grant of Exemption

• 5238 Section 333 grants as of 5/24/16

o 73 specifically name operating sUAS for roof inspection, roof

photography, etc.

• Initially, FAA expected to grant petitions within 120 days

• Many recent approvals required 180 days

www.faa.gov/uas/legislative_programs/section_333/

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Provisions in SUAS Notice of

Proposed Rulemaking (1) Operator (airman) key requirements:

(1) At least 17 years old

(2) (Newly created) UA airman certification with a sUAS rating

(3) FAA aeronautical knowledge initial test & every 24 months

(4) TSA background check

(5) …

(2) sUA must be operated at no more than 500 ft and 100 mph airspeed

(3) sUA must be operated within VLOS (of Operator or Visual Observer) and close enough to be seen by Operator at all times unaided

(4) – … similar airspace and safety restrictions as under Section 333 grant

• Relaxed provisions for a new proposed micro UAS classification of aircraft weighing no more than 4.4 lb

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UAS Advocate Organizations Association for Unmanned Vehicle Systems International (AUVSI) –

largest nonprofit advocating for rights of unmanned systems and robotics community; ~7,500 members support defense, civil and commercial sectors

Property Drone Consortium (PDC) – collaboration of insurance carriers and EagleView; promotes research, development and establishment of regulations for the use of UAS technology in the insurance and construction industries; NRCA is a honorary member

Small UAV Coalition – represents technology companies; advocates for law and policy changes to permit the operation of small UAVs beyond the line of sight, with varying degrees of autonomy for commercial, consumer, recreational and philanthropic purposes

29

Variety of UAS Policy Components

Federal

• FAA (air traffic safety)

• Department of Commerce, National Telecommunications and

Information Administration (NTIA) (privacy)

• Congress (privacy)

• Courts (privacy)

State

• Legislative Assemblies (privacy)

• Courts (privacy)

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The NRCA Roofing Manual

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The NRCA Roofing Manual Online

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www.nrca.net

• Available to all

NRCA member

registered users

(multiple users per

member company)

• “Members only”

section, click on “My

account”, the

“Electronic file”

• View, download and

print

NRCA App

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www.nrca.net/NRCA-app

• NRCA App available on the Apple

Store and Google Play Store for

tablets

• iPhone App also available

• Register within App as being an

NRCA member

• The NRCA Roofing Manual is

viewable to NRCA members

• Favorite and send pages features

energywise.nrca.net

Free, graphical application for constructing a roof assembly to:

• Determine the required roof insulation R-value

• Estimate energy costs attributable to the roof assembly

• Perform temperature gradient calculations including dew

point location in the roof assembly

Limitations:

• Only for commercial buildings with low-slope roof systems

• Energy cost estimates only consider heat transfer through the

roof assembly

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energywise.nrca.net

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roofwinddesigner.com

Free web calculator for design wind loads:

• Uses ASCE 7, Minimum Design Wind Loads for Buildings and

other Structures simplified method

o ASCE 7 is referenced in IBC and NFPA 5000

o Choose between the 2005 and 2010 editions

• Determine design wind loads for field-of-roof, perimeter and

corner areas

• Determine design wind loads applicable to perimeter edge

metal (NEW)

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roofwinddesigner.com

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Determine design wind loads for field of roof, perimeter and

corner areas

roofwinddesigner.com

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Determine design loads applicable to gravel stop and fascia metal

flashings that secure membrane roof systems at the roof edge.

roofwinddesigner.com

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Determine design wind loads for coping metal flashings that

secure membrane roof systems at the roof edge.

NRCA Certification Program for Shop-

fabricated Edge Metal

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• NRCA shop-fabricated edge metal testing

• Verification of compliance with ANSI/SPRI/FM

4435/ES-1 by a code-approved testing and

certification agency (UL and ITS certifications

available)

• Detailed drawings of edge metal flashings

• Product labeling verification of compliance

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Questions?

Maciek Rupar

Director of Technical Services

National Roofing Contractors Association (NRCA)

10255 W. Higgins Road, Suite 600

Rosemont, IL 60018

(847) 299-9070

www.nrca.net

• mrupar@nrca.net