This blog will discusses best roofing practices for the installation of asphalt roof shingles, including installation temperature, shingle sealing methods, shingle course offsets, asphalt shingle nailing location and specifications, low slope and steep slope limits for asphalt shingles, and roof flashing at building eaves and around skylights.
We describe asphalt shingle nailing spacing and locations. Use of staples for asphalt shingle installation. Asphalt roof shingle course offset requirements. Low slope and steep slope limits for asphalt shingles. Asphalt shingle roof flashing at eaves & skylights. Best practices for roofing material installation, flashing, ventilation, nailing, underlayment.
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Sellers Roofing Company is your premier Saint Paul destination for expert commercial and residential roofing services, offering comprehensive solutions from storm damage restoration and repairs to new asphalt shingle installations, all with meticulous craftsmanship and an eye for enhancing your property’s safety and aesthetic.
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Frequently Asked Questions
What are the necessary tools for asphalt roof installation?
The necessary tools for asphalt roof installation include: Nail gun or hammerUtility knifeChalk lineRoofing shearsRoofing nailsRoofing adhesiveRoof pitch gauge
What is the average lifespan of an asphalt roof?
Asphalt shingle roofs typically last between 15 to 30 years, with proper installation and maintenance. The lifespan can be influenced by factors like climate, roof slope, and quality of materials used.
How to install asphalt shingles on a steep roof?
Here are the key steps for installing asphalt shingles on a steep roof:
Use appropriate steep-slope roofing shingles and ensure proper roof deck preparation.
Start at the bottom and work up the roof, overlapping each course by the recommended amount.
Fasten shingles securely with the proper number and placement of roofing nails.
Properly install roof flashing and seal areas around roof penetrations.
Ensure adequate roof ventilation to prevent premature shingle deterioration.
Can I install asphalt roofing over existing shingles?
Yes, you can install asphalt shingles over existing shingles, provided the existing roof is in good condition, has proper ventilation, and the local building codes allow it. However, it's generally recommended to remove the old shingles for a better installation and longer roof life.
What is the maximum temperature for asphalt roofing installation?
Asphalt roofing shingles should be installed in temperatures above 40°F (4°C) to allow for proper sealing and adhesion. Lower temperatures can prevent the shingles from sealing adequately, leading to potential issues with wind uplift.
What is the recommended thickness for asphalt roofing felt?
The recommended thickness for asphalt roofing felt is typically 15 or 30 pounds per square, which corresponds to approximately 0.015 inches (15 lb) or 0.030 inches (30 lb) in thickness.
How to inspect an asphalt roof for damage?
Visually inspect the roof for cracked, curled, or missing shingles.
Check for signs of water damage, such as dark spots or streaks on the roof.
Examine the roof's flashings, vents, and other penetrations for proper sealing.
Clean the roof and gutters to ensure proper drainage and prevent leaks.
Schedule a professional roof inspection to identify any underlying issues.
What is the best underlayment for asphalt roofing?
The best underlayment for asphalt roofing is a synthetic, non-bituminous underlayment. This type of underlayment provides superior tear resistance, waterproofing, and compatibility with asphalt shingles compared to traditional felt paper underlayments.
Can I install an asphalt roof myself?
Installing an asphalt roof yourself is possible but requires proper knowledge, tools, and safety precautions. It is generally recommended to hire a professional roofing contractor who has the expertise and equipment to ensure a proper and safe installation.
What is the difference between architectural and asphalt shingles?
Architectural shingles are thicker, heavier, and have a more dimensional appearance compared to standard asphalt shingles. They are made from multiple layers of asphalt and mineral granules, providing enhanced durability and aesthetic appeal.
How to calculate the number of asphalt shingles needed?
To calculate the number of asphalt shingles needed, measure the roof area in square feet, then divide by the shingle coverage rate (typically 33.3 square feet per bundle) to determine the number of shingle bundles required.
What is the recommended spacing for asphalt roofing nails?
The recommended spacing for asphalt roofing nails is typically 12 inches on center along the horizontal rows and 6 inches on center along the vertical rows. This spacing pattern helps ensure proper attachment and securement of the roofing shingles.
How to prepare the roof deck for asphalt shingles?
Here are the steps to prepare the roof deck for asphalt shingles:
Ensure the roof deck is smooth, clean, and free of debris.
Apply a layer of roof underlayment over the entire roof deck.
Install drip edge flashing along the eaves and rakes of the roof.
Seal all roof deck penetrations with appropriate sealants or flashings.
What is the minimum slope for asphalt roofing?
The minimum slope for asphalt roofing is typically 2:12 (about 10 degrees) for standard shingles and 1:12 (about 5 degrees) for specialty products like asphalt-based metal shingles. Lower slopes may require additional waterproofing measures.
How do I choose an asphalt shingling contractor in St Paul?
Here are some tips for choosing an asphalt shingling contractor in St. Paul:
Verify the contractor is licensed, bonded, and insured in Minnesota.
Check reviews and get references from previous customers in the St. Paul area.
Get multiple quotes and compare the materials, warranties, and labor costs.
Ensure the contractor has experience installing asphalt shingles on homes in St. Paul's climate.
Request a timeline for the project and understand the contractor's work schedule.
How to install asphalt shingles on a flat roof?
Asphalt shingles are not recommended for flat roofs. Instead, consider using modified bitumen, EPDM, or TPO roofing materials designed for low-slope applications. These provide better waterproofing and durability on flat or near-flat roofs.
Can I install asphalt shingles over old shingles?
You can install asphalt shingles over old shingles, but it is generally not recommended. Removing the old shingles first allows for better inspection of the roof deck and proper installation of the new shingles.
What are the benefits of asphalt roof installation?
The main benefits of asphalt roof installation include durability, weather resistance, affordability, and ease of installation. Asphalt shingles are a popular roofing material that provide reliable protection and aesthetic appeal for homes.
Can I install new asphalt shingles over old ones in St Paul?
Yes, it is generally possible to install new asphalt shingles over old ones in St. Paul, provided the existing roof is in sound condition and meets local building code requirements. However, this approach may not be recommended in all cases, and a professional roofer should be consulted to evaluate the specific conditions of the roof.
What are the common mistakes in asphalt roof installation?
Common mistakes in asphalt roof installation include improper nailing pattern and nail placement, lack of underlayment or improper underlayment installation, insufficient roof ventilation, and inadequate flashing at roof penetrations and edges.
What are the recommended fasteners for asphalt shingles?
The recommended fasteners for asphalt shingles are corrosion-resistant roofing nails, typically 1-1/4 to 1-3/4 inches long, with a minimum head diameter of 3/8 inches. The nails should be driven flush with the shingle surface, avoiding over-driving or under-driving.
How much does asphalt roof installation cost?
The cost of asphalt roof installation can vary widely depending on factors like roofing material, roof size, labor costs, and location. On average, asphalt shingle roofing installation typically ranges from $4,000 to $10,000 for a standard-sized home.
Can asphalt roofs be repaired or replaced?
Asphalt roofs can typically be repaired or replaced when they become damaged or reach the end of their lifespan. Repair options include patching or replacing individual shingles, while full roof replacement may be necessary for more extensive damage or aging.
How to handle asphalt shingle installation around chimneys?
To properly install asphalt shingles around chimneys:
Install a metal flashing along the chimney base, overlapping with the underlayment.
Cut shingles to fit tightly against the chimney, sealing with roofing sealant.
Use step flashing up the sides of the chimney, overlapping the courses of shingles.
Seal any gaps with roofing sealant to prevent leaks.
Can I install asphalt shingles myself in St Paul?
Yes, you can typically install asphalt shingles yourself in St. Paul, provided you have the necessary tools, safety equipment, and follow proper installation techniques. Key considerations include roofing slope, ventilation, and flashing details.
What is the estimated cost of asphalt roof installation?
The estimated cost of asphalt roof installation can range from $3.50 to $5.50 per square foot, depending on factors such as roof size, pitch, and accessibility. Additional costs may include removal of the existing roof and installation of underlayment or other materials.
How to install asphalt shingles on a curved roof?
Installing asphalt shingles on a curved roof requires specialized techniques. The shingles must be carefully cut and applied to conform to the roof's contours, ensuring proper water shedding and a smooth, uniform appearance. Proper flashing, sealants, and ventilation are also critical for a successful curved roof installation.
Can I use asphalt shingles on a flat roof?
Asphalt shingles are not recommended for flat roofs. They are designed for sloped roofs with a minimum pitch of 2/12. Flat roofs require different roofing materials, such as modified bitumen, EPDM, or TPO, that can properly shed water and prevent leaks.
What are the common problems with asphalt roofs?
The common problems with asphalt roofs include:
Cracking and curling of the shingles over time due to weathering and deterioration
Leaks around flashing and penetrations
Moss and algae growth that can damage the shingles
Granule loss which exposes the asphalt and reduces the roof's lifespan
How to ensure a watertight asphalt roof installation?
To ensure a watertight asphalt roof installation, follow these best practices:
Properly install and seal roof flashing at eaves, valleys, and around penetrations.
Use the appropriate number and placement of fasteners for the asphalt shingles.
Ensure proper roof slope and underlayment installation to facilitate water drainage.
Apply adequate sealant at shingle overlaps and along roof edges.
What are the building codes for asphalt shingling in St Paul?
The building codes for asphalt shingling in St. Paul, Minnesota require:
Minimum roof pitch of 2:12 for asphalt shingles
Use of approved underlayment and proper nailing patterns
Compliance with manufacturer's installation instructions
Proper flashing at roof penetrations and edges
How to choose the right asphalt shingle color?
When choosing asphalt shingle color, consider the architectural style, roof pitch, and surrounding environment. Popular options include neutral tones like gray, brown, or black, which provide a timeless, versatile look.
What is the warranty on asphalt roof installation?
Asphalt shingle roof installations typically come with a 20-30 year manufacturer's warranty, covering defects in materials and workmanship. Proper installation by a licensed professional is required to maintain the full warranty coverage.
How to ensure proper ventilation for asphalt roofing?
Proper ventilation for asphalt roofing is crucial to prevent moisture buildup and extend the roof's lifespan. Key strategies include Installing ridge vents, soffit vents, or gable vents to create airflow,Ensuring adequate attic insulation to regulate temperature and humidity,Regularly inspecting and clearing any blockages in the ventilation system.
How to prepare a roof for asphalt installation?
To prepare a roof for asphalt shingle installation, follow these steps:
Inspect and repair the roof deck to ensure it is structurally sound and free of any damage.
Install a proper roof underlayment, such as a moisture barrier or synthetic underlayment, to protect the roof from water intrusion.
Ensure the roof has adequate ventilation and attic insulation to prevent heat buildup and improve energy efficiency.
Clean the roof surface to remove any debris or existing roofing material that may interfere with the new asphalt shingle installation.
Prepare the roof edges and penetrations, such as chimneys and vents, by installing the necessary flashing and sealing materials.
How to ensure a watertight seal on asphalt roofing?
To ensure a watertight seal on asphalt roofing, follow these steps:
Properly install and seal roof flashing at eaves, valleys, skylights, and chimneys.
Use the recommended nailing pattern and nail length for asphalt shingles.
Apply roof sealant or adhesive to secure shingle tabs and prevent wind uplift.
Maintain proper roof slope and ventilation to minimize moisture buildup.
What is the role of flashing in asphalt roof installation?
Roof flashing is a critical component in asphalt shingle installation, providing waterproofing at roof edges, penetrations, and transitions to prevent leaks. Proper flashing installation is essential to the roof's long-term performance and integrity.
How to handle asphalt shingle installation around vents?
To properly install asphalt shingles around vents:
Cut shingles to fit tightly around vent flashing.
Seal edges of shingles with roof sealant to prevent leaks.
Secure shingles with extra nails near vent to ensure a watertight seal.
How do varying slopes affect shingle installation?
Asphalt shingles can be installed on low-slope roofs (2/12 to 4/12 pitch) using methods like double-layer underlayment, sealed edges, and longer nails. Steep-slope roofs (above 4/12 pitch) allow standard shingle installation. Proper slope is crucial for effective water runoff and shingle durability.
What shingle colors are best for energy efficiency?
Light-colored asphalt shingles, such as whites, tans, or light grays, can help reflect sunlight and reduce heat absorption, improving energy efficiency and lowering cooling costs. Dark-colored shingles tend to absorb more heat.
Does steep slope affect asphalt shingle choice?
Yes, steep slope affects asphalt shingle choice. For steep slopes (>4:12 pitch), specialized high-grip asphalt shingles with additional self-sealing adhesive are required to prevent shingle slippage.
How does weather impact asphalt roof repairs?
Asphalt roof repairs are impacted by weather in several key ways: temperature affects shingle flexibility and sealability, precipitation can delay or disrupt work, and wind can damage newly installed shingles. Proper weather monitoring and timing are essential for successful asphalt roof repairs.
What flashing type is best for shingles?
The best flashing type for shingles is metal flashing. Metal flashing, such as aluminum or galvanized steel, provides durable, long-lasting protection against leaks at critical roof areas like around chimneys, skylights, and roof edges.
Whats the ideal ventilation for an asphalt roof?
Proper roof ventilation for asphalt shingle roofs is essential to prevent moisture buildup and extend the lifespan of the roof. The ideal ventilation includes a combination of ridge vents, soffit vents, and gable vents to allow for sufficient airflow and prevent heat and moisture buildup in the attic space.
Do shingle warranties cover installation defects?
Shingle warranties generally do not cover installation defects. They typically only cover manufacturing defects in the shingles themselves. Proper shingle installation is the responsibility of the roofing contractor.
How to detect early signs of shingle failure?
Early signs of shingle failure include cracked, curled, or missing shingles, granule loss, and discoloration. Inspect shingles regularly for these indicators to address issues before they worsen.
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