1. Investor Presentation Robert Buck Chief Executive Officer David Grace Chief Financial Officer Spring / Summer 2007 Financials for YTD Q2 ended March 2007

2. 1 Forward looking statements This presentation contains “forward-looking statements”. These statements relate to future events or our future financial performance and involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements expressed or implied by these forward-looking statements. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, levels of activity, performance or achievements. We caution you not to place undue reliance on forward- looking statements, which reflect our analysis only and speak only as of the date of this presentation, and you should refer to the “Risk Factors” section of our latest Form 10K. We undertake no obligation to update the forward- looking statements to reflect subsequent events or circumstances. 1

3. Company Overview Robert Buck Chief Executive Officer 2

4. 3 Beacon overview A leader in key metropolitan markets in the Northeast, Mid-Atlantic, Midwest, Central Plains, Southeast and Southwest regions in the United States and in Eastern Canada 176 branches across 34 U.S. states and 3 Canadian provinces Over 40,000 customers Broad product offering of up to 10,000 SKUs Strong historical performance FY 2006 Sales of $1,500.6 million (8-year CAGR 45%) FY 2006 Operating Income of $100.3 million (8-year CAGR 44%) FY 2006 Sales growth of 76%, organic growth of 14.7% FY 2006 Operating income growth of 65.2% Successfully completed 16 acquisitions since 1997 Founded in 1928, Beacon Roofing Supply, Inc. has grown to be one of the largest distributors of residential and non-residential roofing materials in the United States and Canada

5. 4 Significant strategic accomplishments Key accomplishments since IPO Beacon successfully completed 11 strategic acquisitions since our IPO Opened 18 new greenfield locations since the IPO * Through fiscal 2006

6. 5 March across North America 1997 2001 Today 2004

7. 6 Comprehensive assortment of products for all external residential and commercial building needs Complete product offering 1Steep Slope Roofing System 2Underlayment 3Custom Metals 4Substrates 5Wood & vinyl Siding 6Flat Roof Systems 7Rigid Insulations 8Air & Vapor Barriers 9Pressure Treated Lumber 10Cavity Wall Air & Vapor Barrier Systems 11Doors & Windows 12Through Wall Flashings 13Expansion Joints 14Below Grade Waterproofing System 15Below Grade Drainage Systems 16Waterstop 17Concrete Sealers & Coatings 18Ground Barriers Revenue product mix 1 Residential roofing 41% Non-residential roofing 36% Complementary building products 23% 1 Reflects existing market net revenue for FY 2006 10,000 SKUs offered Selected relationships with manufacturers to achieve substantial volume discounts Re-roofing makes up approximately 67% and 79% of residential and non-residential demand* * source – Freedonia October 2006

8. 7 Why invest in Beacon? High value-added distributor performing a critical role in the roofing supply chain Market leader in an attractive, growing and fragmented industry Highly scalable platform and proven business model with minimal capital expenditures Superior financial performance highlighted by attractive growth and margins Historical 8-year sales CAGR: 45% (1998-2006) FY2006 internal sales growth: 14.7% Industry leading operating income margins: 6.7% (FY2006) Results-oriented management, corporate culture and controls

9. 8 Critical role in roofing materials supply chain... Manufacturers not capable of servicing tens of thousands of specialized contractors On-site and on-time delivery Technical support Credit to contractors Inventory, multiple product lines Contractors not capable of dealing directly with manufacturer Over 40,000 roofing contractors Roofing product distributors will continue to be a critical component of the roofing material supply chain Manufacturers

10. 9 Beacon’s reliability and contractor focus saves its customers time and money Reliability of distributor is crucial to contractor profitability Delivering on time – Delay on a commercial site can cost a contractor $100’s per hour Product availability – Lack of specified product can add substantial cost to contract Our contractor focus allows strong product knowledge and expertise Goal is to partner with the contractor rather than just supply Customers support Beacon’s value proposition Big box retailers less of a factor Limited product selection Retail oriented service and support Basic to no product expertise … reinforced by high value service offerings to the contractor Recent customer survey results

11. 10 Large and attractive market U.S. roofing materials market 2005 Total = $12.7bn * Source: The Freedonia Group – October 2006 *represents sales by manufacturers $12.7 billion industry in the U.S. with a projected growth rate of 1.9% annually through 2010 Re-roofing (vs. new construction) accounts for approximately 70% of roofing expenditures Re-roofing makes up approximately 67% and 79% of residential and non-residential demand, respectively Roofing demand has grown every year since 1993 Grown through three years of declining building construction expenditures (1995, 2001, 2002) Almost two-thirds of the U.S. housing stock was built prior to 1980, with a median age of 30 years Overview Non-residential 35% Residential 65% Roofing market is somewhat insulated from swings in the overall building cycle

12. 11 Re-roofing Concentration Drives Stable Growth Roofing Demand Compared to Interest Rates  Total roofing demand is very stable  Installed base of existing homes and commercial buildings is large and growing  Re-roofing is not a luxury expenditure, and it is not discretionary  There is virtually no correlation between interest rates and demand for roofing Source: Global Industry Analysts

13. 12 Re-roofing Concentration Drives Stable Growth Construction Spending Growth by Category Source: Global Industry Analysts  Residential new construction activity has been volatile  Commercial new construction is also volatile and closely follows economic cycles  Demand for roofing, due to the large installed base of aging structures, remains very stable and consistent despite the construction cycles

14. 13 Highly fragmented market is ripe for consolidation Source: IBIS World Pty Ltd. < 5% are regional Key considerations Beacon is among the three largest roofing distributors in North America Although over 1,500 distributors serve the roofing materials market, fewer than 5% are regional Consolidation driven by customer demands and needs Total number of roofing distributors > 1,500 Roofing distributors Market Share by Revenue Source: Company estimate

15. 14 Strong platform for growth and acquisitions New branch openings (e.g., Boston/ Houston) Existing market growth Acquisitions 1,500+ distributors + + = Potential average annual growth 2–5% 3 – 5%10 – 15%15 – 25% Targeted number: 6-12 locations per year Incremental sales effect: $12–25mm EBITDA impact: Typically breakeven in year one Compelling customer-driven rationale for industry consolidation Acquisition opportunities are identified and actionable Highly fragmented market Over 1,500 players Long history of successful integration Margin and revenue improvement Scalable platform Market plans by location Sales rep productivity Identify new prospects New product offerings 5 – 10% “organic” average annual growth potential Actual sales 8-year CAGR: 45%

16. 15 Growth through new branch openings Disciplined approach to new branch openings in contiguous markets All branches opened by Beacon have been successful 28 branches opened since 1997 Low initial investment: $600,000 – $1,000,000 Rapid breakeven – typically cash flow positive within one year New markets are consistently being identified and evaluated 18 branches have been opened since the IPO Others in location identification stage Branch managers have been identified Selective geographic expansion through new branch openings

17. 16 Branch opening actual results Date Opened: September 1997 Net sales ($ in 000s) $6,579 $14,829 Estimated sales transferred Incremental sales $631 $1,186 Manchester, NH branch opening Operating income ($ in 000s) Estimated income transferred Incremental income 10.7% CAGR 8.2% CAGR Cash flow positive within 8 months

18. 17 Knowledgeable and experienced sales and marketing team 321 sales and business developers 656 branch managers and contractor service representatives 47 manufacturer representatives and product specialists Extensive coverage of/visits to local players Prospect for new customers while increasing sales to existing customers Manages contractor logistics including delivery and product placement Provides value-added technical advice and product knowledge Product specialists who liaise between manufacturers and contractors Instrumental in specifying Beacon-sold products in construction products

19. 18 Existing market growth Significant opportunity to continue leveraging customer relationships to increase sales Sales growth to existing customers of over 10% in 2006 as compared to 2005 Strong track record of increasing the size and profitability of its customer base Over 4,000 new customers added in 2006 Over $54 million of incremental sales from these new customers in 2006 Selective product offering and services expansion * * Represents FY 2006 sales in U.S. existing markets

20. 19 Acquisitions come with significant synergy potential Sophisticated uniform IT platform Beacon has a highly scalable business model Revenue expansion Best practices Large operational scale

21. 20 Acquisition performance The Roof Center and West End Lumber Acquisitions: Acquired June 2001 ($000s) Growth & Synergies Sales $195,868 Gross margin26.6% Operating income $4,953 % margin 2.5% Sales $345,033 Gross margin26.5% Operating income$30,889 % margin 8.95% Twelve month results at closeFiscal 2006 results Sales CAGR of 11.4% Operating income increased by 524% and operating margin expanded by 645 bps 41.7% CAGR

22. Financial overview David Grace Chief Financial Officer 21

23. 22 Significant sales growth Net Sales ($ in millions) 1999–2006 45 % CAGR 0.7 % Growth Fiscal years Year-to-Date

24. 23 Consistent annual growth in profitability and cash flow Operating income ($ in millions) 1999—2006 44% CAGR Note: Operating income for pro forma 2004 excludes certain stock-based-compensation of $9.0mm. Fiscal years 56% Contraction Year-to-Date

25. 24 Margin Analysis Gross profit margin Operating income margin Note: Operating income for pro forma 2004 excludes certain stock-based-compensation of $9.0mm.

26. 25 Financial performance review ($ millions)

27. 26 Financially positioned to deliver on growth Ample liquidity $150 million U.S. revolving line of credit and CDN $15 million Canadian revolving line of credit, with initial term loans totaling $350 million, through October 2013 $119 million available at March 31, 2007 plus approximately $43 million in cash Conservative capital structure Strong free cash flow Net debt/equity ratio of 108% at March 31, 2007 Robust financial controls Systems integrated Sarbanes-Oxley compliant Disciplined financial approach Average bad debt expense of 0.3% of net sales over the past 5 fiscal years Minimal capital expenditures of less than 2% of sales $10.8 million in 2005, $19.1 million for FY 2006

28. 27 Strong and consistent annual financial performance Average annual sales growth goal of 5%-10% (excluding acquisitions) Gross margin goals between 23%–25% Operating margin goals between 7%-8% Capital expenditure goals less than 2% of sales FY 2006 highlights Sales up 76% YoY Operating income up 65% YoY Net income up 50% YoY

29. 28 Company of substance Culture Forecasting & Accountability Excellent Track Record Routines Benchmarking Fundamentals