1 CertainTeed Protecting Your Home From Ice Dams Homeowner s Guide
2 What Are Ice Dams? Ice dams are formed when heat from the inside of a home escapes into the attic and warms the roof decking during the winter. This heat, combined with heat from the sun, can melt snow on the roof. Melting snow on the upper roof and in the valleys then runs down toward the eaves as water. When it reaches the cold eaves and gutters it refreezes. The continual thaw and re-freeze process creates ice dams. The result is water backing up under the roof shingles or behind fascia boards where it can soak through the roof decking or wall sheathing, causing damage to attics, ceilings and walls.
3 Ice Dam Formation
4 Ice Dam Defense There are three ways to defend against the damage ice dams cause: insulation, ventilation and water-proofing shingle underlayment. All three work together. Insulation keeps heat from escaping from your home s living space into your attic. Ventilation removes the heat and helps keep the roof deck evenly cool to help prevent snow from melting on the roof. Finally, waterproofing shingle underlayment, such as WinterGuard, is laid across the roof before roof shingles are applied. WinterGuard is warranted against leaks from dams that do form on the roof. Fiber Glass Insulation WinterGuard
5 With existing roofs, waterproofing shingle underlayment is only an option if you remove the existing shingles or are building a new addition. Regardless, increasing the insulation R-value in the attic is always possible and ventilation can usually be added to your attic easily. Ridge Vents Shingles WinterGuard Vented Soffits
6 Insulation An attic insulated to today s energy standards with fiber glass insulation minimizes heat escape through the ceiling, virtually eliminating the possibility of snow melting and refreezing at the base of the roof. If your home was built before 1980, chances are it needs more attic insulation. The amount of insulation your house should have will vary depending on where you live, how your house is built and many other factors including your lifestyle. Insulation levels are recommended by geographic zones and are stated in R-values. R-value is the resistance to heat flow of a material. The higher the R-value, the greater the insulating power. The following map and chart indicate recommended levels of insulation by geographic area.
7 Ceiling Wall Floor Insulation Insulation Insulation R-value R-value R-value 1 R-49 R-19 R-25 2 R-38 R-19 R-19 3 R-38 R-19 R-13 4 R-30 R-19 R-11 5 R-19 R-11 R-11 R-values on the chart represent CertainTeed recommendations for meeting today s energy standards. Department of Energy thermal recommendations and the Council of American Building Officials Model Energy Code provide the basis for CertainTeed s insulation recommendations.
8 Ventilation The second thing to look for in your attic is the amount of ventilation that you have. It is important to have ventilation in the attic so any heat lost from the interior of the home is drawn up and out of the attic. Adequate attic ventilation will help the roof deck stay cool. Another benefit of having your attic ventilated is that it allows for moisture that rises into the attic from things such as bathing, cooking and the laundry to escape. Unchecked moisture can promote mold, mildew, and wood rot. There are two common ways to ensure that excess moisture or heat can escape to the outside. One way is to use a power or mechanical ventilation system. The other way is through a natural, or static, ventilation system. A power ventilator is an electric powered fan installed at the roof or gable that runs by a thermostat or humidistat when the attic needs ventilation. Natural or static ventilation systems consist of simple vent or covered openings in your attic. These are typically ridge vents, gable, eave, or roof vents. Many ventilation experts agree that externally baffled ridge vents combined with vented soffits are a very effective method for ventilating an attic.
9 Where older construction doesn t permit ridge and soffit ventilation, powered fans can be a good alternative. A properly designed ventilation system must have both intake vents in the soffit or in the eaves at the lower part of the attic, as well as exhaust ventilation, such as ridge vents, high in the attic at or near the ridge. Cooler, dryer outside air typically enters through eave vents near the attic floor, forcing existing moisture-laden or heated air out through vents placed high on the roof or gable. By ensuring proper insulation and ventilation, you will run less risk of the formation of ice dams, and you will substantially reduce the likelihood of damaging your attic components.
10 Waterproofing Underlayment If you are building a new home, or reroofing an older home, you should also insist that waterproofing shingle underlay ment be installed before your roof shingles are applied. As mentioned earlier, it is completely resistant to water and, as such, is a critical last line of defense against leaks, preventing backed up water from getting into your home wherever it is applied. CertainTeed WinterGuard TM is warranted to prevent water penetration for the warranted life of the new asphalt shingles applied over it (up to a maximum of 50 years). While shingle underlayment does not prevent the formation of ice dams, it will prevent backed up water from getting into the house. Discuss shingle underlayment placement with your builder or contractor. However, as a guide, CertainTeed recom mends that it be applied: Under metal flashing and counter flashing at roof penetrations, sidewalls, etc. In areas where roof pitches change, in valleys and around chimneys. Along the eaves and at short cornice projections.
11 Special Cases Many new homes feature cathedral or vaultedceiling roofs and skylights. Both present special cases for insulation that CertainTeed recommends you discuss carefully with your builder or contractor. Insulation manufacturers like CertainTeed have created high-performance fiber glass batts that are designed specifically for cathedral ceilings to provide higher R-values per inch than standard fiber glass batts. In the case of skylights, quality workmanship and attention to detail are important in preventing ice dams and condensation which often lead to leaks. To avoid problems, make sure your builder or contractor properly insulates around the skylight and uses a moisture retarder to prevent condensa tion. In addition, applying waterproofing shingle underlayment around the skylight opening is recommended. Warranty All shingle manufacturers exclude from warranty coverage leaks caused by water backup behind ice dams, which can form on the eaves of the roof. These leaks can be easily prevented. Proper ventilation will minimize the chances of ice dam formation, and WinterGuard TM waterproofing shingle underlayment, properly installed, will prevent leaks in spite of ice dam formation and will also prevent leaks from wind-driven rain.
12 Easy selection. Long-term protection. And a #1 rating with building and remodeling professionals. What s behind our #1 rating? Builders and remodelers across America know certain things to be true of CertainTeed. For starters, we ve been in the roofing business for over 100 years, and we have thousands of satisfied homeowners. The process of building that satisfaction begins the moment you turn to us. CertainTeed offers you the broadest range of color and style choices. But you ll see it s not style over substance. You ll get a roof that s made from the highest quality materials and backed by a strong warranty program. It s our promise to you: quality made certain, satisfaction guaranteed. You ve got questions? For answers, or to find the professional contractor nearest you, call our Consumer Hotline at ASK ABOUT ALL OF OUR OTHER CERTAINTEED PRODUCTS AND SYSTEMS: ROOFING SIDING TRIM WINDOWS DECKING RAILING FENCE INSULATION GYPSUM CEILINGS FOUNDATIONS PIPE CertainTeed Corporation P.O. Box 860 Valley Forge, PA Professional: Consumer: Code No /11 CertainTeed Corporation, Printed in U.S.A.
CertainTeed Shingle Applicator s Manual Shingle Underlayments and Flintlastic SA 5 Roof Systems YOUR OBJECTIVE: To learn the differences between the various underlayments available. To learn when a particular
RINALDI HOMES (NIAGARA) INC. WELCOME HOME PACKAGE P.O. BOX 1655 ST.CATHARINES. ON L2R 7K1 905-688-1283 1 TABLE OF CONTENTS Table of Contents EMERGENCY CONTACTS... 3 CUSTOMER SERVICE POLICIES... 4 WRITTEN
EnergySavers Tips on Saving Money & Energy at Home energysavers.gov Contents 3 4 7 12 19 21 Save Money and Energy Today Get started with things you can do now, and use the whole-house approach to ensure
Mold in Housing Information for First Nation Housing Managers Working together for housing solutions CMHC PARTNERS IN HOUSING (CMHC) has been Canada s national housing agency for more than 65 years. Together
Introduction Floods can happen in cities, in mountains, and in deserts. Every year, more homes and businesses are damaged by floods than by any other natural disaster. Floods move, and can spread for miles.
Protecting Your Business from Water Damage M A R K E L I N S U R A N C E C O M P A N Y Copyright 2006 Markel Insurance Company The purpose of these materials is to provide professionals with recognized
Risk Control Bulletin Water Damage Prevention A Property Protection Imperative Water is one of the most destructive agents when released into a building. Water erodes surfaces; causes rot and deterioration
MOLD GUIDANCE FOR TENANTS AND LANDLORDS (NOTE: Not applicable to Hot and Humid Climates) Many landlords and tenants do not understand why mold problems start and how to safely clean them up when they do.
Is Your Home Protected From Water Damage? A Homeowner s Guide to Water Damage Prevention acknowledgements Prepared by the Institute for Business & Home Safety (IBHS), an initiative of the insurance industry
Welcome to your New Home, Congratulations on the Purchase of Your New Aberdeen Home On behalf of the Aberdeen Team, we would like to extend a sincere thank you for choosing Aberdeen Homes to be the builder
Damp, Condensation and Mould in Rental Property A LandlordZONE article This is a common problem in homes. Older properties tend to suffer more than new ones, but rental properties are particularly prone.
Chicago Southland EPA Brownfields Weatherization Job Training Program STUDENT WORKBOOK This program was funded by the United States Environmental Protection Agency (USEPA) through the American Recovery
HOW TO IDENTIFY PROBLEMS & MAINTAIN YOUR HOME S DRAINAGE SYSTEMS Some of the information contained in this Guide was derived from the City of Edmonton's Homeowner's Guide to Flood Prevention. This Guide
WATER DAMAGE LOSS PREVENTION TECHNIQUES FOR CALIFORNIA-PACIFIC ANNUAL CONFERENCE OF THE UNITED METHODIST CHURCH As your partner in managing the risk of financial loss to your ministry, we are asking every
Owner s Manual What you need to know about your system for now and for the future. Maintain Your System Annually! Rev 5/15/14 Page 1 Homeowner s guide important information Please read the following information:
HOW TO S for the HANDY HOMEOWNER REPAIRING WALLS & FLOORS Hurricane damage can result from wind-borne debris, flooding, fallen trees, sustained winds and strong gusts, driving rains, and other water intrusion.
Accurate Home Inspection of Illinois 815-260-1727 1213 Norley st. Joliet, illinois 60435 firstname.lastname@example.org We Inspect to Protect!!! Property Inspection Report For Steve & Jenny Hynek 210 W.Chicago Ave.,
A Massachusetts Guide to Insurance for Your Home and Ways to Help Reduce Your Insurance Premiums DEVAL L. PATRICK GOVERNOR DANIEL O CONNELL SECRETARY OF HOUSING AND ECONOMIC DEVELOPMENT DANIEL C. CRANE
PROPERTY INSURANCE IS EVOLVING A TOOLKIT FOR BROKERS Canada, along with the rest of the world, is experiencing a dramatic increase in catastrophic losses due to severe weather events. We have created this
The Homeowner s Guide to Flood Prevention HOW TO IDENTIFY PROBLEMS and MAINTAIN YOUR HOME S DRAINAGE SYSTEMS Table of Contents Introduction... 1 Chapter 1: Understanding Drainage... 2 Home Drainage System
A Limited Liability Company 3557 Evans Rd., Atlanta, Georgia 30340 email@example.com! www.greystoneinspections.com A Home Inspection Report For the Exclusive Use of: Home Buyers For the Property
Avoidance of Mold Avoidance of Mold Introduction Architects and engineers need to consider the potential for mold growth in all phases of building design, construction, operation, and maintenance. There
later damage - Loss ControL axisinsurance.ca Table of Contents EXECUTIVE SUMMARY... 1 FACILITY SYSTEMS WATER DAMAGE... 2 Frozen Pipes.....................................................................................
White Paper 11800 Ridge Parkway Broomfiled, CO 80021 1-800-638-2638 http://www.42u.com firstname.lastname@example.org Best Practices for Wire-free Environmental Monitoring in the Data Center Introduction Monitoring for