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How To Install Roof Flashing On Homes In La Plata, MD

Master The Art Of Roof Flashing Installation In La Plata

Worker installing roof flashing

Have you ever wondered how to keep your roof safe from leaks? Or why do some roofs last longer than others?

In this post, you’ll learn the essentials of how to install roof flashing correctly.

By the end, you’ll know how to replace roof flashing to protect your home from water damage and extend the life of your roof.

Or you can get your roof repaired by La Plata professionals.


How To Install Roof Flashing On Homes In La Plata, MD

  1. Prepare the Roof Surface
  2. Install Shingles Up to the Flashing Area
  3. Cut and Fit Flashing Pieces
  4. Secure the Flashing
  5. Seal the Edges
  6. Install the Final Shingles

Want to know more about roof flashing and its importance?


How To Install Step Flashing

Step flashing is used where a roof intersects a vertical wall. It involves placing small, individual pieces of flashing at each course of shingles, ensuring water is directed away from the wall and down the roof. This method is essential for preventing leaks in these vulnerable areas.

  1. Install Roofing Underlayment
    • Clean the roof deck to remove any debris or dirt.
    • Roll out the roofing underlayment from the bottom edge of the roof upwards, overlapping each row by at least 2 inches.
    • Secure the underlayment with roofing nails, placing them every 6 to 8 inches along the edges and 12 inches in the middle. Ensure the underlayment is smooth and free of wrinkles.
  2. Shingle Up to the Area Where the Wall Begins
    • Start laying shingles at the bottom edge of the roof, using a starter strip to provide additional protection against water infiltration.
    • Nail each shingle in place, ensuring they are properly aligned and overlapped.
    • Continue laying shingles until you reach the area where the roof meets the vertical wall.
  3. Create a Corner Flashing Piece Using Tin Snips, or Use Pre-Bent Pieces
    • Measure the area where the roof meets the wall corner to determine the size of the corner flashing piece needed.
    • Use tin snips to cut a piece of metal flashing to the required size, or select a pre-bent corner flashing piece.
    • Ensure the flashing piece fits snugly around the corner, covering both the roof and the vertical wall. The flashing should extend at least 8 inches above the shingles for optimal protection.
  4. Secure with Nails and Roofing Cement
    • Apply a layer of roofing cement to the underside of the corner flashing piece to help it adhere to the roof and wall.
    • Place the corner flashing piece in position, making sure it covers both the roof and the vertical wall.
    • Secure the flashing piece with roofing nails, driving the nails into the roof deck and not the vertical wall. This allows for movement between the roof and wall materials.
    • Apply additional roofing cement along the edges of the flashing to create a watertight seal.
  5. Alternate Layers of Shingles and Flashing
    • Place the first piece of step flashing over the shingle at the base of the wall.
    • Nail the step flashing in place, ensuring the nails are placed high enough to be covered by the next shingle.
    • Install the next shingle, overlapping the step flashing and securing it with nails.
    • Continue alternating between shingles and flashing pieces, making sure each flashing piece overlaps the previous one by at least 3 inches.

How To Install Chimney Flashing

Chimney flashing involves several types of flashing to ensure a watertight seal around the chimney. Proper installation prevents leaks where the chimney intersects the roof.

  1. Lay Base Flashing Around the Chimney, Extending 4 Inches Past Each End
    • Cut a piece of base flashing to fit around the chimney, ensuring it extends at least 4 inches beyond each side of the chimney.
    • Place the base flashing at the bottom of the chimney, ensuring it fits snugly against the roof surface.
    • Secure the base flashing with galvanized nails and roofing cement.
  2. Notch and Bend Pieces to Fit Around the Chimney
    • Cut and notch pieces of step flashing to fit around the sides of the chimney. Each piece should overlap the previous one by at least 2 inches.
    • Bend the flashing to fit tightly against the chimney and roof surface.
    • Secure each piece of step flashing with roofing nails, ensuring the nails are placed high enough to be covered by the next layer of shingles.
    • Apply roofing cement under each piece for added adherence and waterproofing.
  3. Cut an Indent into the Chimney with a Grinder
    • Use a grinder with a diamond blade to cut a groove into the mortar joints of the chimney. This groove will hold the counter flashing securely in place.
    • Ensure the groove is deep enough to accommodate the flashing without allowing water to seep behind it.
  4. Apply Sealant and Install Counter Flashing into Place
    • Apply a generous amount of exterior sealant into the groove, then press the counter flashing into place.
    • Ensure the counter flashing overlaps the step flashing and extends at least 2 inches below the top of the chimney.
    • Secure the counter flashing with roofing nails and apply additional sealant to create a watertight barrier.

How To Install Vent Pipe Flashing

Vent pipe flashing is essential for sealing around vent pipes that penetrate the roof, preventing leaks where the pipe meets the roof surface. Proper installation of vent pipe flashing ensures a watertight barrier.

  1. Remove Shingles Around the Vent Pipe Area
    • Remove shingles around the vent pipe area to expose the roof deck.
    • Clean the pipe thoroughly, removing any old caulk and debris to ensure a clean surface for the new flashing.
  2. Apply Ice and Water Shield Underlayment
    • Apply a piece of ice and water shield underlayment around the pipe penetration. This underlayment provides an extra layer of protection against water infiltration.
    • Ensure the underlayment extends at least 6 inches around the base of the pipe.
  3. Place the Pipe Flashing Over the Vent Pipe
    • Place the pipe flashing over the vent pipe, ensuring it fits snugly around the pipe and lies flat against the roof deck.
  4. Secure the Flashing with Roofing Nails
    • Secure the flashing with roofing nails, placing the nails in areas least exposed to water. Typically, this means nailing at the top corners and along the sides of the flashing.
  5. Reinstall Shingles Around the Flashing
    • Reinstall shingles around the flashing, cutting them to fit snugly around the pipe flashing base. Ensure the bottom edge of the flashing remains exposed while the sides and top are covered by shingles.
  6. Apply Roofing Cement Around the Edges
    • Apply roofing cement around the edges of the shingles and flashing to create a watertight seal.

How To Install Valley Flashing

Valley flashing is used in the valleys where two roof planes meet. It directs water away from the valley and off the roof, preventing leaks in these vulnerable areas.

  1. Measure the Length of the Valley
    • Measure the length of the valley where the two roof planes meet.
    • Cut the valley flashing to the measured length. If the valley is long, you may need to cut multiple pieces and overlap them.
  2. Lay a Waterproof Membrane Along the Valley
    • Lay a waterproof membrane along the valley, extending at least 6 inches on either side. This membrane acts as an additional barrier against water infiltration.
    • Apply roofing cement to the membrane, ensuring it is evenly spread to avoid any gaps.
  3. Lay the Valley Flashing Over the Waterproof Membrane
    • Lay the valley flashing over the waterproof membrane, ensuring it is flush with the drip edges at the bottom of the valley.
  4. Secure the Valley Flashing with Galvanized Nails
    • Secure the valley flashing with galvanized nails, placing them along the edges and every 8 to 12 inches along the length of the flashing.
  5. Seal Seams with Roofing Cement
    • Seal any seams between overlapping pieces of flashing with roofing cement to ensure a continuous, watertight barrier.

Here’s how to replace the shingles on your roof.


Tips For A Successful Installation

Always Start With Proper Underlayment

Underlayment provides an additional barrier against water infiltration. Begin by installing a high-quality underlayment before you start installing roof flashing. This step is crucial in neighborhoods like Heritage Green in La Plata, MD, where heavy rains are common.

Ensure Each Flashing Piece Overlaps Correctly

Proper overlapping is key to preventing leaks. Each piece of flashing should overlap the previous one by at least 3 inches. This ensures that water flows down the roof and away from critical areas.

Use Appropriate Sealants And Cements For Waterproofing

Use roofing cement and appropriate sealants to secure the flashing and create a waterproof seal. Applying a layer of roofing cement under each flashing piece and at the seams ensures that the installation is watertight.

Install Flashing To Allow For Expansion And Contraction

Building materials expand and contract with temperature changes. Install flashing in a way that allows for this movement to prevent the flashing from warping or breaking. This is especially important for continuous flashing, which needs expansion joints to accommodate these changes.

Secure The Flashing Properly

Ensure that the flashing is securely fastened with roofing nails or screws. Loose flashing can lead to water infiltration and significant roof damage over time.

Don’t Incorrectly Overlap Flashing Pieces

Insufficient overlap between flashing pieces can create gaps where water can seep through. Always make sure to overlap each piece by at least 3 inches.

Use The Correct Materials And Tools For The Job

Using the wrong type of flashing or improper tools can compromise the integrity of the installation. For example, using thin metal flashing where thicker material is needed can result in premature failure. Always use materials and tools that are appropriate for your specific roofing project.

Don’t Ignore Manufacturer’s Instructions

Always follow the manufacturer’s instructions for each type of flashing. These guidelines are designed to ensure that the flashing performs as intended and provides maximum protection.


Seal The Roofing Deal With Pinpoint Innovations

When it comes to ensuring your roof is leak-proof and long-lasting, Pinpoint Innovations has got you covered. Our team of experts specializes in roof flashing installation, making sure every detail is handled with precision.

Don’t leave your roofing needs to chance; let us provide the peace of mind you deserve. Fill out our contact form today, or give us a call to get started on your roofing project.