Builders FirstSource : Corporate Presentation

OUTPERFORM TODAY. TRANSFORM TOMORROW.

Corporate Presentation

M a y 2 0 2 4

Safe Harbor and Non-GAAP Financial Measures

Cautionary Notice

Statements in this presentation that are not purely historical facts or that necessarily depend upon future events, including statements about expected market share gains, forecasted financial performance or other statements about anticipations, beliefs, expectations, hopes, intentions or strategies for the future, may be forward- looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. In addition, oral statements made by our directors, officers and employees to the investor and analyst communities, media representatives and others, depending upon their nature, may also constitute forward-looking statements. All forward-looking statements are based upon currently available information and the Company's current assumptions, expectations and projections about future events. Readers are cautioned not to place undue reliance on forward-looking statements. Forward-looking statements are by nature inherently uncertain, and actual results or events may differ materially from the results or events described in the forward-looking statements as a result of many factors. Builders FirstSource, Inc. undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Any forward- looking statements involve risks and uncertainties, many of which are beyond the Company's control or may be currently unknown to the Company, that could cause actual events or results to differ materially from the events or results described in the forward-looking statements, including risks or uncertainties related to the Company's growth strategies, including gaining share and its digital strategies, or the Company's revenues and operating results being highly dependent on, among other things, the homebuilding industry, lumber prices and macroeconomic trends, including interest rates and potential labor and supply shortages. Builders FirstSource, Inc. may not succeed in addressing these and other risks. Further information regarding factors that could affect our financial and other results can be found in the risk factors section of Builders FirstSource, Inc.'s most recent annual report on Form 10-K filed with the Securities and Exchange Commission ("SEC") and may also be described from time to time in the other reports the Company files with the SEC. Consequently, all forward-looking statements in this presentation are qualified by the factors, risks and uncertainties contained therein.

Use of Non-GAAP Financial Measures

This presentation includes financial measures and terms not calculated in accordance with accounting principles generally accepted in the United States ("GAAP") in order to provide investors with an alternative method for assessing our operating results in a manner that enables investors to more thoroughly evaluate our current performance as compared to past performance. We believe these non-GAAP measures provide investors with a better baseline for modeling our future earnings expectations. Our management uses these non-GAAP measures for the same purpose. We believe that our investors should have access to the same set of tools that we use in analyzing our results. These non-GAAP measures should be considered in addition to results prepared in accordance with GAAP, but should not be considered a substitute for or superior to GAAP results. Our calculations of adjusted EBITDA, adjusted EBITDA margin, free cash flow and net leverage are not necessarily comparable to similarly titled measures reported by other companies. The company provided detailed explanations and reconciliations of these non-GAAP financial measures in the earnings release included in its Form 8-K filed with the Securities and Exchange Commission on May 7, 2024.

2

Why Invest With BFS

Builders FirstSource is

the largest U.S. supplier of building products, prefabricated components, and value-added services to the professional builder for new residential construction and repair and remodeling.

Industry Leader. Differentiated position in fragmented market with growing portfolio of value-added products and solutions across diverse geographies and end markets nationwide

Focusing on Innovation. Investing in value-added solutions and operational excellence to solve customer pain points such as labor availability and jobsite productivity, while fueling our profitable growth

Accelerating Digital Adoption and Scale. Our Digital Tools will drive greater efficiency across homebuilding, enhance our product offerings, and create value for customers

Strong Financial Position. Fortress balance sheet, low net leverage profile, cost/operating discipline, and exceptional cash flow generation provide us with the strength and flexibility to create value over the long term

Compounding Shareholder Value. Disciplined capital allocation approach with a focus on investing in the business, accretive bolt-onacquisitions, and returning cash to shareholders through share repurchases driven by strong cash flow generation

3

Builders FirstSource Snapshot (NYSE: BLDR)

KEY STATS

Irving, TX	~$20.6B	>28K	$17.1B
Headquarters	Market-Cap1	Employees	Net Sales

~53%

NATIONAL REACH. LOCAL EXPERTISE.

$2.9B $1.9B

Adj. EBITDA2

FCF2

Value-Added

Product Mix23%

28%

Product	2023 Net Sales
Category	Breakdown

24%

25%

Specialty Building Products & Services

Lumber & Lumber Sheet Goods

Manufactured Products

Windows, Doors & Millwork

	17%
14%	End
Market
	69%

Single-Family

Multi-Family

Repair & Remodel / Other

~570	90	48
Locations	of Top 100	of Top 50
(>280 Value-Added	MSAs Served	MSAs Served
Product Operations3)

Locations:

Truss

Millwork

Yard

43

States

Served

Largest U.S. Supplier of Building Products, Prefabricated Components,

and Value-Added Services to the Professional Builder

1 Source: FactSet as of 12/29/2023.

2	Adjusted EBITDA and Free Cash Flow (or FCF) are non-GAAP financial measures. Please see the appendix hereto for reconciliations to their most closely related GAAP financial measures.	4
3	Includes components (truss & wall panel) and millwork operations. As disclosed at Investor Day on 12/5/23.

Builders FirstSource - What We Do

Trusses

S
p
e			Siding, Exterior Trim, & Other Products
ci
al
	t
	y
	B

Wall Panels

Engineered Wood

Manuf

a

c

t

u

	d
e
r

	s
	t
	c
	u
	d
	o
r
P	28%

u
i
l
d
i
n
g
P
	r
23%	o		Professional Install, Design
d
u			Assistance, & Other Services
c
	t
	s
	/
	S
	e
	r
	v
		i
		c			Digital Solutions
		e
53%		s

Interior and
Exterior Doors			W
			i
			n
			d
				o	25%
				s
Windows			w
		,
				D
					o
					o
					r
					s
					&
					M
					i
					l
					l
		Millwork	w

(Interior Trim & Custom Features)

Value-Added Product Mix

ork

24%		m	b
						u
						L
					&
				r
			e
		b
	m
u
L

e

r

S

h

	s
	d
	o
	o
	G
t
e	e

Dimensional Lumber

Oriented Strand Board (OSB)

Plywood

Note: FY 2023 product mix as disclosed on Q4 2023 earnings call on 2/22/24.

5

Advantages of Manufactured Products

Manufactured Products

Why Frame with Components?

Benefits of Framing

• Floor and Roof Trusses
• Wall Panels
• Engineered Wood Products
• READY-FRAME® - Optimized Framing Solutions

Better

Faster

Safer

Lower Waste

• Computerized designs reduce mistakes and optimize material usage, leading to lower costs
• Components are pre-cut and/or assembled, saving labor and time
• Less cutting on the job reduces injury risk for a safer and cleaner jobsite
• Put less in the dumpster
• Reduce disposal fees
• Cleaner site

with Components vs. Traditional Stick Framing

~223.4

Hours Saved1

~25%

Less Wood Used1

~220K

Tons of CO2e Avoided2

1 Data from Structural Building Components Association (SBCA) bestwaytoframe.com. Benefits when two identical homes are built side by side.

2 Calculation includes roof and floor trusses, wood panels, and READY-FRAME®.

6

Company History -

Respect the Past, Embrace the Future

	Successfully	Builders FirstSource	BFS and BMC	Acquired WTS
Builders' Supply	acquired ProBuild,	merge, creating nation's	Paradigm, a software
navigated
creating a national	premier supplier of building	solutions and services
& Lumber Co.	Great Recession	professional dealer with	materials and services,	provider for the building
acquired by	and housing market	~400 locations across	operating ~550 locations	products industry - major
JLL Partners	collapse	40 states	across 40 states	step in digital journey
1998	2008 - 2011	JUL 2015	JAN 2021	AUG 2021

Added to S&P 500,

1. significant achievement reflecting our growth and position as the industry leader for building products

DEC 2023

2005	2012	DEC 2015	JULY 2021	SINCE 2021
Commenced	Exceeded $1B in	Stock Building Supply	Completed listing	INVESTOR DAY
IPO of Builders	revenues for first time	completed merger with BMC,	transfer to NYSE	14 Tuck-in Acquisitions1
FirstSource on Nasdaq	in 5 years	to form BMC Stock Holdings		to further expand national
				reach and capabilities

Continuing to Take Transformative Actions to Accelerate Our Lead

1 As of 12/31/23

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We Continue to Transform the Homebuilding Industry

Key Accomplishments Since the 2021 Merger

• Delivered organic sales growth and margin expansion
• Drove strong M&A execution and track record
• Accelerated digital transformation

Transformative Actions Underway

• Diversifying value-added products and services
• Evolving and improving product mix with a focus on digital tools and capabilities
• Investing in manufacturing automation ($130M1 since 2020) to drive operational excellence and address labor challenges

Continued Leadership Focus

• Exceptional leadership team with an average of >30 years field leadership experience, providing deep bench strength
• Foster commercial and operational excellence
• Drive continued growth of value-added solutions, driving sustained double-digit Adjusted EBITDA margins with less reliance on lumber
• Maintain fortress balance sheet and compound value through disciplined capital allocation

Consistent and Clear Strategy to Compound Shareholder Value

1 As disclosed at Investor Day on 12/5/23
* Non-GAAP financial measures; see Appendix for reconciliations to the most directly comparable GAAP financial measures.	8

Well-Positioned for Above-Market Growth in the Future

$17.1B BLDR 2023 Revenue1

Total Addressable Market (		% BLDR Share)		Positive Momentum and Clear
					Path Toward Additional Gains
					Driven by
					1	Growing share with
	~11%				existing customers
~$110B				~1%
~2%
Single-Family2	~$140B	~$175B	2	Expanding product offerings
Multi-
U.S. New Construction	R&R4
Family3
Building Materials
				3	Increasing value-added products
					4	Capturing market share in
					under-penetrated geographies
69% 2023 Revenue	14%	13%	5	Delivering our digital solutions
2023 Revenue	2023 Revenue

1	Percent of 2023 Revenue will not foot to 100% for Single-Family,Multi-Family and R&R because Other (4%) is not included.
2	Source: TAM generated using U.S. Census, Dodge, HIRI, and Company estimates of all building materials and not just the products that we sell; ~$134k assumed materials cost per home
based on Company estimates as of November 2023. Share is based on TTM September 2023 Company sales.	9
3	Source: DODGE; TTM estimate as of November 2023. 4 Source: HIRI estimate for Professional Repair & Remodel; TTM estimate as of November 2023.

Long-Term Housing Tailwinds Remain Intact

Housing Starts (000s)

4,000

Housing Starts

Cumulative Underbuilt Homes

YoY Growth in Households (000s)

Underlying fundamentals for demand support

continued housing growth

3,500
3,000	Underbuilt by ~1.7M - 3.7M
2,500	Homes Since 2010
2,000
1,500
1,000
500

0

2,550

2,150

1,750

1,350

950

550

150

(250)

20-year Average

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

2021

2022

2023

Annual Average Rate on 30-yearFixed-Rate Mortgages1 (%)

10.0

9.0

8.0

7.0	25-year Average 5.3%
6.0

5.0

4.0

3.0

2.0

1.0

																									1
1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

2021

2022

2023

Demographic and Economic Factors

• Homes have been underbuilt by ~1.7M - 3.7M since 2010, creating a long-term tailwind
• Current interest rates are elevated relative to historical averages, delaying household formation
• Existing home inventory for sale is at a historic low, driving home buyers to new build
• Strong case for housing to have room to run if we can be more efficient as an industry

Source: U.S. Census, Freddie Mac, MortgageNewsDaily, Evercore ISI Research, management estimates.
1 As of 4/3/2024 the 30YR FRM was 7.07% sourced from MortgageNewsDaily.com.	10