Building codes vary greatly depending on where you live. Any roofing project you
undertake must comply with building codes applicable to your jurisdiction.
Before you begin any roofing project, it is vitally important to obtain the applicable building code.
Recycling And Waste Disposal
The most important step to preparing your roof for recycling is to pre-sort materials
as they come off the roof. Shingles, felt or other asphaltic underlayment, and nails
are what get recycled. The goal is to get these materials into a separate pile or
container. Doing this pre-sorting can even save you money, because you’re making
it easier for the recycler.
Wood, metal, and other mixed jobsite debris should be kept separate. Many recyclers
will allow you to place these materials on top of the load—maybe with a tarp separating
the two layers—but it must be easy for the recycler to separate the materials, otherwise
the load will not be recycled. Check with your recycler first.
You can find a recycler near you at
www.shinglerecycling.org. Or, many transfer stations have recycling
arrangements. Be sure to call in advance to see if there are any special requirements.
If you decide to have a professional install your roof, use the GAF Contractor Locator and look for the Certified Green
Roofer designation—these are professional roofing contractors that have undertaken
a number of sustainable business practices, including shingle recycling.
When looking for a new roof, rest assured you’ve come to the right place. Not only
because most GAF shingles now offer a Lifetime Ltd. Warranty for peace of mind,
but because you’re almost certain to find the right combination of style and color
to suit your taste.
GAF has made it easy for you to determine the materials you need for your new roof.
Our Roof Wizard walks you through four simple steps: selecting your shingle style,
your shingle color, your warranty coverage level, and your roof accessories.
Important Note: GAF’s best warranties—including those that cover
the quality of the installer—are only available when a roof is installed by a GAF
factory-certified contractor. Find one here.
Estimating How Much Material You Will Need
To estimate the amount of material you need for your roof, you must first calculate
your roof's pitch (slope). The pitch is the rise over the run. A tool called an
inclinometer should be placed on the top ridge of the house and will allow you to
record the measurement of the slope. Then you must determine the total square footage.
Measure all sections of your roof, including the hips, valleys, ridges, eaves, rakes,
and any overhangs.
Once you have all your measurements, use them to calculate the total square footage.
Be sure to take the measurement you got from the inclinometer and use a roof pitch
factor chart to figure out how much you will need to add to the total square footage.
Then, divide that number by 100 to get how many squares (10' x 10') of roofing material
you’ll require for your roofing job. You can find numerous roof calculators and
measuring guides online to assist you in this process. Remember to estimate the
amount of tear-off debris you will need to handle as well at this time.
Estimating Roof Ventilation Requirements
Deciding on the proper vent and the amount of ventilation needed is critical. Always
consult your local building code for balanced attic ventilation requirements in
For projects on a budget, GAF’s Three-Tab Shingles will give you basic, affordable protection
for your home.
The #1-selling shingles in North America, Timberline® Lifetime Shingles offer the very
best combination of performance and value that you can get for your home.
Lifetime Designer Shingles are our top-of-the-line asphalt shingles. Offered
in a wide array of styles and colors, these shingles come in two categories to choose
from depending on your budget: the Ultra-Premium Collection and the Value Collection.
Tearoff Or Overlay?
You should tear off old roofing to repair or replace rotted or deteriorated decking
and framing; to replace bad flashing; to install proper soffit ventilation; to install
leak barriers; to seal critical leak areas such as valleys, dormers, skylights,
chimneys, roof slope transition areas, ice dam areas, and wind-driven rain entry
points; and to comply with building codes.
Many top contractors feel that you should remove old roofing on every project, but
it is acceptable to overlay when the existing roof is lying flat, when flashing
and roof deck protection are still performing, if there have been no previous leak
problems, and if ventilation at the soffit is acceptable or attainable without tearing