How To Install Roof Shingles Over Old Shingles

Does it make sense to install new shingles over former ones? Sometimes, absolutely! In the right situation, putting new shingles over old ones saves coin and helps the environment.

Although it is often necessary to remove old shingles, information technology's bully when you can avoid the added expense of a tear-off. Tear-offs increment labor costs and they generate waste material that typically requires transportation to a landfill.

When Re-roofing Works and When it Doesn't

Modern building codes only allow ii layers of shingles on residential roofs. Since each layer of shingles weighs several hundred pounds per foursquare, three or more layers is but too much. A New Jersey residential roof is not designed to handle the farthermost weight of many layers of shingles, particularly when the roof arrangement strains under the weight of heavy snow and ice.

If you already accept two layers of shingles on your roof, everything needs to exist torn off, right downwards to the sheathing. A tear-off is also required when the roof inspector notes multiple spongy spots and/or deteriorating decking on your northern NJ roof. A tear-off is besides necessary when the second layer of shingles wouldn't lay flat, such every bit when the kickoff layer consists of highly textured dimensional shingles.

Preparing for Your Roofing Project

Covering materials and a debris container are typically delivered a 24-hour interval or 2 earlier your scheduled re-covering project in the Tristate area. It is helpful for a homeowner to be ready for the arrival of the covering crew. Information technology is ideal to move patio furniture and other personal items that are in line with the border of the roof. This makes it easier for the crew to clean upward any droppings.

Re-covering: Step by Step Process

There is more than to the installation of a new layer of shingles than meets the eye. Consider the many steps that are required of your NJ covering contractor to consummate a proper installation.

Make clean the roof

If at that place is debris on your roof, it is of import for the crew to sweep it away earlier the re-roofing gets underway. You don't want anything defenseless between the old and new layers of shingles.

Remove ridge caps and obstructions

Before the roofing crew can start putting new shingles over old ones, they must temporarily remove obstructions like air vents and pipe flashing.

Repair damaged areas

putting new shingles over old ones

Your new roof is just every bit good equally what lies underneath information technology. Therefore, it is important that your roofer set up whatever problem areas. It'due south sort of similar the highway repair work that happens before repaving.

For example, damaged underlayment and sheathing must be repaired or replaced before the re-covering gets underway. When leaks go undetected, there may exist sheathing that is rotting or otherwise deteriorating. In these areas, it is necessary to cut out the bad plywood or OSB before the installation of new underlayment and shingles.

When putting new shingles over old ones, it is important to have a relatively smooth surface to work with. For example, if a shingle is cracked, torn or broken, it is important to replace the shingle or to use roofing cement to secure it.

Install ice and water barrier

When h2o backs upwards behind an water ice dam, it can work its way upwards under the shingles and possibly into the sub-covering. Therefore, northern NJ homes oftentimes benefit from the improver of an optional waterproof bulwark along the eaves and anywhere ice dams may form. It is oftentimes possible to safely install this waterproof barrier right over your existing shingles.

Install new flashing

The proper installation of new flashing is of import. For example, drip flashing protects the edges of a roof, while valley flashing promotes the proper flow of h2o off the roof.

Add a starter strip

Starter strips are the first rows of shingles installed along the bottom edge of the roof. Starter strip shingles feature a high-quality adhesive that locks your shingles in place to minimize the chance of shingle blow-offs.

Cutting and install new shingles

Any installation of the new shingles must follow manufacturer recommendations. For example, there must be an adequate amount of overlap, and the fasteners must exist properly positioned. It is important to use experienced roof technicians who know how to cut new shingles to precisely fit around vents and other roof penetrations.

Install new ridge caps

To finish off a new roof, special shingles called ridge caps are used forth the hips and ridges. Ridge caps are multi-layered, heavy-duty shingles designed to protect this vulnerable area of your roof.

Taking Care of Your New Roof

Once the crew is done putting new shingles over old ones, it is all-time to have your roof professionally inspected in one case or twice a year. Season after season, you want to ensure that there is no tempest impairment you can't run into from the basis. You also want to find out correct away if a warranty claim is ever necessary.

Your roofer can also perform seasonal maintenance to extend the life of your new roof. Occasional cleaning removes droppings, moss growth and algae buildup. Replacing missing or cleaved shingles prevents minor issues from condign major ones.

Contact CRS for Prompt Help

For more than xl years, CRS has taken intendance of the roofing needs of northern NJ homeowners. GAF, the largest roofing manufacturer in North America, has named CRS a Principal Elite Contractor. Fewer than three percent of the nation's roofing companies reach this distinction.

As a Main Aristocracy Contractor , CRS is authorized to offer its customers the very best manufacturer warranties in the business. Enquire us well-nigh the special features of GAF Golden Pledge and Argent Pledge warranties.

Whatever your covering need, we'd welcome the opportunity to send our certified roof inspector out to have a wait at your roof system. For prompt, friendly help, please contact u.s.a. .