Reshingling over old shingles can be an efficient way to give your roof a new lease on life without the hassle of a complete tear-off. Layering new shingles over existing ones not only saves time but also reduces the cost of labor and disposal of old roofing material.
This approach is particularly useful when the roof decking is in good condition and there’s only one existing layer of shingles.
Before you begin, it’s crucial to check local building codes to ensure you’re following the requirements for roofing projects in your area.
The key to a successful reroofing job lies in proper preparation. This includes inspecting for any damage, laying down roofing felt, and securing all materials according to recommended practices.
When adding new shingles, careful installation is essential.
Star Roofing Contractors highlights that you’ll need to level out the old surface, possibly by using techniques such as installing horsefeathers or reducing the height of rows of older shingles. This ensures a flat base for the new roof, preventing future issues and maintaining the integrity of your home.
Preparing for Reshingling
When preparing to reshingle a roof over old shingles, careful inspection of the current roof condition, gathering the right materials and tools, and following building codes and safety precautions are essential.
Assessing the Current Roof Condition
Begin by inspecting the roof thoroughly for any damaged or broken shingles, leaks, or signs of deterioration.
If there are more than two layers of shingles, a complete tear-off is recommended instead of adding another layer.
Look for uneven spots or areas where the roof deck might be compromised. Pay special attention to valleys and vulnerable spots for water damage. Addressing any issues at this stage will prevent future complications and ensure a smooth reshingling process.
Gathering the Necessary Materials and Tools
Ensure you have all the necessary materials and tools to fix your roof effectively.
Common materials include new shingles, roofing felt, roofing nails, and a straightedge. Tools might include a hammer, nail gun, ladder, work gloves, boots, and a helmet.
A roofing professional might also suggest using a roof nail gun for efficiency. Make sure every tool is in good working condition and readily accessible. Having the right tools will make the job quicker and safer.
Understanding Building Codes and Safety Precautions
Familiarize yourself with local building codes to ensure compliance during the reshingling process.
These codes might dictate specific materials or methods for installation, so make sure to follow them.
Prioritize safety by using appropriate gear such as gloves, boots, and helmets. Secure the ladder properly and work cautiously, especially on sloped surfaces. It’s advisable to have a buddy system in place to assist and call for help if needed.
Execution of Reshingling
Reshingling over existing shingles involves several key steps. These include preparing the roof by stripping old shingles and underlayment, and installing flashing and new underlayment. Each step is crucial for ensuring a durable and effective shingle installation.
But for your convenience, you can also have Star Roofing Contractors, do the task for you.
Stripping the Old Shingles and Underlayment
Start by removing old shingles and underlayment to expose the roof sheathing. Use a roofing shovel to lift and tear off existing roofing materials. Sweep the roof clean of debris and inspect it thoroughly.
Look for damaged sheathing and replace it if necessary. Removing old shingles ensures a flat surface for the new shingles. Depending on the condition, this step might involve tearing off multiple layers. Use a utility knife to cut felt paper and other materials accurately.
Installing New Flashing and Underlayment
Install new flashing and underlayment to create a waterproof barrier between the shingles and the roof deck.
Begin with the drip edge along the roof edge, securing it with roofing nails.
Use felt paper or a synthetic underlayment, rolling it out evenly over the sheathing and securing it with nails. Apply valley flashing where needed, ensuring a secure fit. Install counterflashing around chimneys and other obstructions to prevent water infiltration. This step is vital for the longevity and effectiveness of the roofing system.
Laying the Starter Strip and First Shingles Course
Start by installing a starter strip along the roof edges to provide a secure base for the first course of shingles. Use a chalk line to ensure the strip is straight and align it with the roof edge.
Nail the starter strip in place with roofing nails.
Continue by laying the first course of new shingles, overlapping the starter strip to create a seamless look. Align the shingles carefully and secure them with nails at the designated points. This foundational layer ensures the subsequent courses are properly aligned.
Techniques for Shingling the Valleys, Ridges, and Hips
When shingling valleys, ridges, and hips, precision and proper technique are essential.
For valleys, weave the shingles or use a closed-cut method, ensuring that the valley flashing is properly covered.
Shingle up the roof slopes, making sure each course aligns correctly.
For ridges and hips, use properly cut shingles to fit over the peaks, securing them with nails. Apply additional layers if necessary to maintain a consistent appearance. These areas are prone to water infiltration, so extra care is critical.
Finalizing with Ridge Caps and Additional Features
Finish the reshingling process by installing ridge caps along the roof peaks. These specially designed shingles provide a finished look and seal the roof’s highest points.
Nail the ridge caps securely, ensuring there are no gaps. Install any additional features like air vents, which are crucial for attic ventilation.
Check for any remaining gaps or loose shingles, and make any necessary adjustments. Ensure the roof is securely sealed to prevent future issues and extend its lifespan.