Indicators You Need an Asphalt Roof Replacement or InstallationBefore you learn how to install asphalt shingles, you should determine if you need a roof installation or repairs. Several factors contribute to your roof’s decreased longevity and replacement needs, including:
- Your roof’s age: After many years of storm damage and wear and tear, your roof no longer effectively protects your home. You should think about getting a replacement if your roof is around 20 years old.
- Storm damage: Storms cause tree branches and other debris to land on your roof, potentially damaging asphalt tiles. Hail ranks as a leading cause of asphalt shingle damage. If your roof has storm damage, a roof replacement is the best option to fix this issue.
- Premature roof failures: Sometimes, your roof system fails before it reaches old age. Common causes include incorrect roof installations and poor ventilation, leading to increased moisture in your attic and roof tiles. If you notice missing shingles, look into scheduling an installation.
Steps To Install Asphalt Roof ShinglesBefore installing shingles, you’ll need to measure your roof to calculate how many shingles you need. Calculate the length and width to determine surface area, then repeat for all sections and add the final number of square feet. Divide that number by 100 to determine how many squares your roof contains. It’s best to get more shingles than necessary to avoid running out before completion. After purchasing the correct asphalt shingles and putting on the required protective gear to prevent injury during your DIY shingle installation, you’re ready to begin.
Install UnderlaymentIf you plan to start from scratch, you’ll first need to install a new underlayment, a moisture barrier, and a drip edge. Staple or nail the barrier down, then apply the drip edge while overlapping it to ensure no leaks at the seams. Install the underlayment in rows overlapping the previous row to prevent leaks. After this, you’ll also need to apply asphalt roofing felt along the ridge and overlap it with the underlayment to protect the top half of the roof. Using a drip edge along each side of the ridge prevents moisture from seeping under the shingles and inflicting further water damage.
Install FlashingsIf your roof has valleys, the next step in how to install asphalt shingles involves protecting them. You’ll need to install metal flashings where these areas meet to prevent leaks. Nail around their outside edges to fasten them.
Install the ShinglesNext, install the shingles overlapping each. Begin with a layer at the bottom and work up the roof from left to right. Use up to six roofing nails per shingle and secure them with a nail gun below the nailing line. Don’t forget to install shingles along the sides of your roof and overlap them as you move up. Use all shingles from the same bundle to maintain a steady color across the entire surface. Next, install ridge capping shingles at the top ridge, each ridge cap with one nail per side to secure it successfully.
After the Roofing InstallationHomeowners new to DIY roofing projects and just learning how to install asphalt shingles will want to keep a close eye on their roofs after completing the installation process. Despite your best efforts to install shingles precisely, leaks and other issues can still occur. Regularly check your work for:
- Flapping or loose roof tiles
- Roof leaks