Joseph Nowicki, Executive VP & Chief Financial Officer

JefferiesGlobal Industrials Conference August 2019

DISCLOSURE NOTICE

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This presentation contains information about management's view of the Company's future expectations, plans and prospects that constitute forward-lookingstatements for purposes of the safe harbor provisions under the Private Securities Litigation Reform Act of 1995. Actual results may differ materially from thoseindicated by such forward-looking statements as a result of various important factors, including, but not limited to, those set forth in the "Risk Factors" sectionof the Company's latest Form 10-K. In addition, the forward-looking statements included in this presentation represent the Company's views as of the date ofthis presentation and these views could change. However, while the Company may elect to update these forward-looking statements at some point, theCompany specifically disclaims any obligation to do so, other than as required by federal securities laws. These forward-looking statements should not be reliedupon as representing the Company's views as of any date subsequent to the date of this presentation.

This presentation contains references to certain financial measures that are not presented in accordance with United States Generally Accepted AccountingPrinciples (“GAAP"). The Company uses non-GAAP financial measures to evaluate financial performance, analyze underlying business trends and establishoperational goals and forecasts that are used when allocating resources. The Company believes these non-GAAP financial measures permit investors to betterunderstand changes in underlying operating performance over comparative periods by providing financial results that are unaffected by cyclical variances thatcan be driven by items such as investment activity or purchase accounting adjustments. While the Company believes these measures are useful to investorswhen evaluating performance, they are not prepared and presented in accordance with GAAP, and therefore should be considered supplemental in nature. TheCompany’s non-GAAP financial measures should not be considered in isolation or as a substitute for other financial performance measures presented inaccordance with GAAP. These non-GAAP financial measures may have material limitations including, but not limited to, the exclusion of certain costs without acorresponding reduction of net income for the income generated by the assets to which the excluded costs are related. In addition, these non-GAAP financialmeasures may differ from similarly titled measures presented by other companies.

A reconciliation of these non-GAAP financial measures to their most directly comparable GAAP financial measure can be found in the Appendix as well asCompany’s latest Form 8-K, filed with the SEC on August 6, 2019.

ESTABLISHED TRACK RECORD

Roofing products distribution remains our core• TTM sales two-thirds roofing and one-third complementary

exterior and interior building products

A leader in key metropolitan markets• 537 branches in 50 US states and 6 Canadian provinces*• 100,000+ customers with a broad product offering up to 90,000

SKU’s • Repair & Remodel fuels market demand (~70-75%)

Strong long-term historical performance• Sales CAGR = 17.7%• Adjusted EBITDA CAGR = 17.3%• Adjusted EBITDA Margin Average = 7.6%

Rapid growth since 2004 IPO• Opened 89 new greenfield locations• Completed 46 acquisitions

3

$0

$2,000

$4,000

$6,000

$8,000Net Sales Since IPO

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*Branch numbers as of June 30, 2019

43%

24%

33%

TTM Sales Mix

Residential Roofing

Non-Residential Roofing

Complementary Products

3RD QUARTER RECAP

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Adjusted EPS of $0.92; Organic Sales Declined 1%

Severe rain negatively impacted sales by ~$85M (4-5%) and EPS by ~$0.20

FY2019 Adjusted EPS outlook of $2.30-$2.50

Digital platform expected to produce sales of $350M in FY2019

Significant cost reduction actions implemented; expected savings of $25M annually

Positive 3rd Quarter free cash flow* for only the 2nd time in past 12 years

Reduced net debt by $24M during the quarter

July month sales up 3-4% as weather pressures eased

*Free cash flow represents operating cash flow less capital expenditures

FY2016-2019 | BEACON’S TRANSFORMATION

Revenue from $2.5B to $7B+ 16 Acquisitions including RSG and

Allied Market Share ~9% to ~20% Combined RSG + Allied Synergies:

$175M+

EBITDA Margin Opportunity Raised 200-300 bps*

Consolidation Boosting Health of Industry

Digital Platform Launch

Introduction and Buildout of Private Label

Established Multiple Product Platforms

Larger Size Raises Returns on Growth Initiatives

97

44

130

6979

10718

31

68

3348

53

PRE-RSG BRANCH COUNT FYE2018 BRANCH COUNT

5 | www.becn.com*Based on combined Allied & RSG synergies on pro forma revenue base of ~$7B

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ORGANIC GROWTH

Multi-Channel Sales PlatformComplementary ProductsPrivate Label OfferingSelling EffectivenessSelective GreenfieldsHigh R&R Exposure

OPERATIONAL EXECUTION

Reduce Overall Cost StructureRegional Service Areas (RSAs)Allied Synergy Realization Continuous ImprovementGenerate Fixed Cost Leverage

BALANCE SHEET FOCUSED

Net Debt Leverage Targets <3.0xImproving Working Capital EfficiencyLow Capex RequirementsFree Cash Flow ConversionProven De-Leveraging After Large

Strategic Acquisitions

Great Industry and We Are The Innovation Leader

2019… CAPITALIZING ON OUR INVESTMENTS

BUILDING BLOCKS OF GROWTH Source: Company Estimates

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MARKET GROWTH

GREENFIELDS and RSAs

ACQUISITIONSSAME-BRANCH

GROWTH INITIATIVES

Deliver share gains through investments in

growth driversOutperform market

Stable R&R (~70-75% of Sales),

Favorable Economy

46 Acquisitions since IPO; Near-term focus on improving balance

sheet

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Proven Execution to Continue

RSA model improves customer service,

operating efficiency and organic growth

WHY PROS CHOOSE BEACONCustomer Engagement That Drives Customer Retention and Innovation

• Digital Bill Pay• Online Rebate Tracking

• Delivery Tracking • Jobsite Pictures• Triple Check

• Beacon Pro+• 3D+ Estimate to Order • Project Management

PURCHASE MATERIALS

DELIVERY

CLOSE OUT THE JOB

• Homeowner Financing • In-Home Visualizer

• Digital Lead Gen• Logic Track • Storm Tracker

• HomeAdvisor Partnership• Certification Programs • Custom Marketing Programs

SELL THE JOB

GENERATE LEADS

ESTABLISH CREDIBILITY

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CONTRACTOR LIFECYCLE

MULTI-CHANNEL APPROACH

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500+ Branch Locations Pro+ Digital Suite

Expanded Market Presence and Industry Leading Multi-Channel Experience

B2B buyers say personalized customer care has a moderate to major influence on their loyalty82%Source: Salesforce, December 2017

DIGITAL – A DIFFERENTIATOR FOR CUSTOMERS

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24/7 Access Time Savings / Efficiency Improved Order Accuracy Quick, Easy & Paperless

Higher Close Rates Decreased Estimating & Material List Build Time Increased Average Revenue Per Job Higher Number of Estimates Per Day

Advance Notice of Scheduled Delivery Real-Time Photos of Delivered Materials Less Time Waiting, More Time Working Manage Multiple Orders Simultaneously

PRIVATE LABEL EXPANSION

$250Mcombined PL sales

Peak created by RSG

RSG/Peakacquisition

Allied/TRI-BUILTacquisition

TRI-BUILT sales reach $100M

TRI-BUILT sales reach $12M

1990

2006

2012

2014

2016

2018

2018

2,500+SKUs

30+ PRODUCT CATEGORIES

50% CUSTOMERSBUY PRIVATE LABEL

TARGET $500M REVENUE BY 2021

TRI-BUILT created by Allied

JANUARY

OCTOBER

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WILL ACHIEVE SALES AND MARGIN GROWTH BY DRIVING CUSTOMER ADOPTION

Beacon’s High Quality Brand of Products That Deliver Professional Results

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Customers Benefit Improved delivery timetables Inventory availability Improved branch interactions Consistent end-to-end customer experience

Beacon Benefits Enhances sales growth Improves operating cost leverage, reduces

working capital and lowers capex requests Better leverage of size/scale; local market

competitive advantage

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OverviewMarket-based P&Ls Coordinated fleet management / dispatch Geographic alignment of sales force Centralized hub with inventory concentration Relocations improving proximity to customers

REGIONAL SERVICE AREA (RSA)A network of branches sharing resources and coordinating operations

IMPROVING OUR COST STRUCTURE

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Allied Synergies

RSA Model

Seasonal Hiring Controls

Cost Actions

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Recent Operating Cost Actions

Historical EBITDA margin range of 6.0% to 8.5%

9-11% EBITDA margin goal

Significant actions taken to improve cost structure

Aggressively managing costs positions us for breakout margins in the future (especially in active storm years)

-10%

-6%

-2%

2%

6%

10%

5%

6%

7%

8%

9%

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

*Org

anic

Sal

es G

row

th (%

)

EBIT

DA M

argi

n (%

)

ADJUSTED EBITDAmargin (%)

Adjusted EBITDA Margins Organic Sales Growth

*2019 based on midpoint of guidance

Active Storm Years

STRENGTHENING OUR BALANCE SHEET

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Drive sustainable and consistent levels of free cash flow

Use working capital efficiently; RSA model helps improve working capital requirements

Capital expenditures ≤ 1% of sales

Proper mix of fixed and pre-payable debt allow quicker deleveraging and protection against a rising interest rate environment

Net Debt Leverage*

*Net debt divided by adjusted EBITDA: 2017 excludes proceeds from September 2017 secondary offering

-10%

-5%

0%

5%

10%0%

100%

200%

300%

400%

500%

600%

Org

anic

Sal

es G

row

th (I

nver

ted)

Ope

ratin

g C

ash

Flow

to N

et In

com

e

Operating Cash Flow to Net Income Organic Sales

Avg Operating Cash Flowto Net Income: 199%

Cash Flow Conversion

-

1.0

2.0

3.0

4.0

5.0Acquisitions

LONG TERM FINANCIAL GOALS

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≤ 3.0x

2019 Forecast 7%

Acquisition Synergies

Digital Growth

Private Label

Cost Actions

Normal Storms

Future 9-11%

FINANCIAL STATEMENT MEASURE LONG-TERM TARGETS

Organic Growth 5 - 10%

Adjusted EBITDA Margins 9 - 11%

≤ 3.0xNet Debt Leverage

BEACON SUMMARY

STRONG INVESTMENT THESIS

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Attractive industry with Beacon the innovation leader

High R&R exposure with relatively low discretion

Substantial industry consolidation

Strong management team and Board

Multi-Channel approach in early stages

Multiple specialty building products platforms

Focused on cost leverage and efficiency gains

Long-term sales growth of 18% since IPO

Above market organic growth history and outlook

Synergy realization upside (RSG, Allied)

9-11% EBITDA target range

Sustainable high levels of free cash flow generation

Planned debt/EBITDA reduction to below 3x

SOLID FINANCIAL PERFORMANCE