December 10, 2013

Ply Gem Industries

JP Morgan SMid Cap Conference

LegalDisclaimer

1

These slides and the accompanying oral discussion contain certain statements that are not historical facts,including information concerning possible or assumed future results of our operations. Those statementsconstitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Actof 1995. Such statements involve known and unknown risks, uncertainties and other factors that couldcause the actual results of the Company to differ materially from the results expressed in or implied by ourforward-looking statements, including the availability and cost of raw materials and purchasedcomponents, the level of construction and remodeling activity, changes in general economic and businessconditions, conditions affecting the industries we serve and our customers, the rate of sales growth,availability of labor force and efficiencies, product liability claims, our high degree of leverage and otherfactors discussed in the Company’s news releases, public statements and/or filings with the Securities andExchange Commission, including the Company’s most recent Annual and Quarterly Reports on Form 10-Kand Form 10-Q. Many of these factors are outside of the Company’s control and all of these factors aredifficult or impossible to predict accurately. The Company undertakes no obligation to update publicly anyforward-looking statements, whether as a result of new information, future events or otherwise.

In addition, these slides and the accompanying oral discussion reference non-GAAP financial measures,such as adjusted EBITDA. A reconciliation of each non-GAAP financial measure to the most directlycomparable GAAP financial measure is provided in our earnings releases posted on www.plygem.com.

ManagementPresenters

2

Gary RobinettePresident and CEO

•President and Chief Executive Officer since 2006

•30+ years of experience with building productsand distribution companies

•Prior to joining Ply Gem, served as Executive VicePresident and COO of Stock Building Supply

•Vice President and Chief Financial Officer since 2004

•22+ years of experience

•Prior to his current role, served as VP of Finance ofsiding and accessories subsidiaries

Shawn PoeVice President and CFO

One of the largest manufacturers of exterior buildingand home improvement products in North America

SIDINGWINDOWS

REPLACEMENTNEW CONSTRUCTION

Nearly$1.5Billioninsales

Approx6,700associates

Ply Gem’sProfile

55%45%

45%55%

3

Provider of branded products for new constructionand home improvement markets sold through manychannels of distribution covering most price points.

Aluminum Accessories

Western Canada (Windows)

Vinyl and Aluminum Windows

Vinyl Siding#1

#1

#1

#1

Ply Gem’sMarket

4

23 manufacturing plants 30 distribution centers On-time delivery

NAFootprint

Window Manufacturing

Siding / Access Manufacturing

Fence + Rail Manufacturing

Corporate / HQ

Stone Manufacturing

Window Distribution - Canada

Siding Distribution - Canada

5

Gable vents and accessories

Gutter protection systems

Vinyl and aluminum soffit

Window mantles

Manufactured Stone

Vinyl and aluminum siding

Shutters

Mounting Blocks

Decorative corner posts

Rain removal systems

Door surround systems

Patio Doors

Windows

Railing and Fencing

Composite Rail

Outdoor Structures

Exterior Doors

New Window Technology

PVC Trim

Suite of New Exterior Products

ProductCategories

6

7

SidingGroup

• #1 vinyl siding manufacturer in North America(with approx. 40% share in the US)

• Consolidated industry with 4 participantsholding over 90% share

• Strong trade brands

• Multi-channel distribution network servicingboth new construction and R&R

• State-of-the-art automated manufacturingfacilities with capacity to support plannedgrowth

Key Brands

North American Market Summary

Why We Win

$ millions

Market size: According to Principia Partners

$658

Exterior CladdingMarket Size

Vinyl SidingMarket Size

Ply Gem2012 Net Sales

Market Leader in Vinyl Siding

~$1,800

~$5,300

$463

Market Size Ply Gem 2012 Net Sales

8

WindowGroup

• #1 vinyl & aluminum window manufacturer inthe US

• #1 window & door manufacturer in WesternCanada (post-acquisitions)

• Multi-channel distribution network servicingboth new construction and R&R covering everyprice point

• Highly efficient, vertically integrated production

• Continued to gain market share duringdownturn

Why We Win Key Brands

North American Market Summary

$ millions

Market size: Company estimate – New construction and R&R

Leader in Vinyl and Aluminum Windows

~$9,000

StrategicPriorities

NewProducts

Utilizetechnology(Products /operations)

Sustainability

Improvebusinessdiversity

Doubledigitgrowth

Cross sellourproducts

Safety

Lowcost

Highqualitystandard

CustomerFocus

Innovation

ProfitableGrowth

ContinuousImprovement

HumanResources

LEVERAGE

TalentManagement

Succession Plan

Communicate&empower

Excellentcustomerservice

Measure,Engagement

Brand management

9

10

StrategicEvolution

2013 2017to

A Market Leader The Market Innovator

A Ply Gem Brand The Leading Brand

Organic Growth (Market Share) Growth Through Strategic Acquisitions

Coordinated back office Lean through Technology

Executive Dev & Succession Our Future Leaders

New Products and Share New Channels and Markets

“Ply Gem’s Future”

11

The DesignedExterior • Provides differentiation for Ply Gem customers

• Provides a single sourcing opportunity

• Hits the sweet spot of an emerging trend

• Features NAHB Green Approved products

• Fulfills the “One Ply Gem” MISSION

Alexandria, VA Designed Exterior Remodel

BEFORE

Three Weeks later using The Designed Exterior concept

AFTER

Complete Exterior Solution Offering for Customers

Innovation The Culture of Innovation

Hire InnovationOfficer

Innovation intoCompensation Structure

CollaborationPlatform

PartnershipsSuppliers/Partners

Universities

Foundation

Labs

New Products

OpenInnovation

12

Priority #1Safety

3.99 3.98

3.30

1.81 1.76 1.58 1.85 1.94

7.26 7.116.65

5.42 5.47 5.21 5.27

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

2006 2007 2008 2009 2010 2011 2012 Q3 2013

TR

R

Year

Recordable Incident RatePly Gem Industries, Inc.

Ply Gem Combined National Trend

WORLD CLASS

A world class safety record is Job #1

13

Market and HousingUpdate

Crisis of Confidence is Starting to Improve…

Source: Zillow, Census, Conference Board

5.4%

7.3%

81.5%

15

1,7191,474

1,036

616442 471 434 537 629

8261,161

354

338

306

284

112 114 178247

296

326

357

0

500

1,000

1,500

2,000

2,500

2005 2006 2007 2008 2009 2010 2011 2012 2013E 2014E 2015E

Single-Family Multi-Family

75%2,073

1,812

1,342

900

554 585 612783

924

1,152

1,518

SFHS Forecasted to Increase

Source: NAHB16

121 11993

7694 83 84 78 81

106 109

118

73

97 112131

105 106

0

50

100

150

200

250

2006 2007 2008 2009 2010 2011 2012 2013E 2014E

Single-Family Multi-Family

Canada SFHS Forecast

Source: CMHC

17

55

3027

25 2421

1310 8

0

10

20

30

40

50

60

2014

Windows

Siding

Doors

Roofing

Bathtubs & Showers

Decking

Flooring

Kitchen Cabinets

Water Pipes

Top Growth Productsfor Replacement Contractors

Source: Hanley Wood August 2013 Audience SurveyWDMA Market Outlook18

Growth will be in Healthier MarketsMarket Health Index

19

Financial Overview

21

Ply GemResults

Third Quarter Results

3rd Qtr & 9 Month Highlights(Operating Earnings Excludes IPO & Acquisition Cost)

$27.3

$32.2

Q3 2012 Q3 2013

Op

era

tin

gE

arn

ing

s

$70.7

$84.2

Q3 2012 Q3 2013

Gro

ss

Pro

fit

$306.2$407.4

Q3 2012 Q3 2013Ne

tS

ale

s

9 Month Results

$852.7 $1,032.7

YTD 2012 YTD 2013Ne

tS

ale

s

$187.0

$200.3

YTD 2013 YTD 2013

Gro

ss

Pro

fit

$59.4

$58.0

YTD 2012 YTD 2013

Op

era

tin

gE

arn

ing

s

Q3 2012 Gross Margins 23.1%

Volume 1.0%

One-Time Changes -1.1%

Siding Aluminum Price -0.7%

Windows Product Mix -1.0%

Windows Ramp-up Costs -0.7%

Q3 2013 Gross Margins 20.7%

Gross MarginSummary

New customer win costs -0.4%

Restructuring charges -0.4%

Acquisition related costs -0.3%Quarterly timing of price toaluminum material cost

Recovered on an annualizedbasis expected

Outsized growth of our lower endaluminum window products

New Construction window unitvolume up 37%

22

FinancialSummary Q313 LTM Net Sales = $1.3 Billion

23

2007 2008 2009 2010 2011 2012 2013 LTM

Single Family Housing Starts 1,036 616 442 471 434 535 616

(29.7)% (40.5)% (28.2)% 6.5% (8.1)% 23.3% 15.1%

Ply Gem Net Sales $1,363.5 $1,175.0 $951.4 $995.9 $1,034.9 $1,121.3 $1,301.3

(13.4)% (13.8)% (19.0)% 4.7% 3.9% 8.4% 16.1%

• Ply Gem continues to outperform the market

• SFHS down 48% from ‘07 to ‘12, Ply Gem down 17.8%

• Market share gains of over $350 million from 2007 to

2011

• Numerous new customer wins as Ply Gem is a clear

industry leader

• Gienow & Mitten acquisitions contribute $108 to ‘13

LTM Sales

• Customer mix is well balanced at approx. 55%/45%

$600

$800

$1,000

$1,200

$1,400

2007 2008 2009 2010 2011 2012 2013LTM

Ply Gem sales