How Much Does It Cost to Replace a Window Lintel ?

1. Basic cost estimation structure

• A DIY job can keep you on the lower end if you already have the right framing tools and are comfortable with carpentry.
• A professional contractor will handle all the details (safety, code compliance, finishing) and usually adds a 10‑20 % markup for overhead.

Tip: If the window is in a load‑bearing wall, you’ll need a licensed structural engineer to design a proper replacement lintel. That extra step can add $.

2. Quick‑Shop List for a Renovation

(You can usually find all of these at a local home‑improvement store or online with free shipping. Ref: Approved Window Contractor or Builder)

3. Replacing a Lintel Above a Window – Step‑by‑Step

1. Assess the Load

   • Measure the distance (span) the lintel must support.
   • Determine the wall’s load‑bearing role.

2. Choose the Right Material

   • Wood: Cedar or pressure‑treated lumber, 2×6 or 2×8.
   • Steel: Channel or I‑beam rated for the span and load.

3. Remove the Old Lintel

   • Cut away any trim or sash.
   • Remove the existing lintel carefully—keep the framing in place.

4. Install the New Lintel

   • Position a jack or support temporarily.
   • Secure the new lintel with proper lag bolts or brackets.
   • Check for level and straightness.

5. Finish

   • Attach any necessary blocking or furring.
   • Re‑trim the window or reinstall sash.
   • Seal edges with expanding foam or sealant for air/water tightness.

6. Inspect

   • Verify that the wall is plumb and the lintel is level.
   • Double‑check all fasteners.

Pro Tip: If you’re unsure about the load capacity, let a structural engineer design and sign off on the lintel before you start.

4. Roof Cleaning & Waterproofing Basics

Key Points

• Cleaning first removes moss, algae, and debris that can trap moisture.
• EPDM is best for flat roofs, offering high UV resistance and a long lifespan (15–30 yrs).
• Bitumen (asphalt‑based) is a cost‑effective alternative, especially for low‑sloped roofs.
• Always hire a licensed contractor for waterproofing—wrong installation can void warranties.

5. Choosing a Roof Waterproofing Contractor

1. Check Credentials

   • License, insurance, and bonding.
   • Certifications from EPDM or bitumen manufacturers (e.g., GAF, Carlisle).

2. Ask for References & Portfolio

   • Look at completed projects similar to yours.
   • Verify that they include post‑installation warranties.

3. Get Multiple Quotes

   • Compare pricing, scope, and guarantee terms.
   • Beware of prices that are too low—could mean cutting corners.

4. Inspect the Proposal

   • Detailed breakdown of materials, labor, and timelines.
   • Clause for change orders or unforeseen conditions.

5. Warranty & Maintenance

   • Minimum of 5‑10 yrs for the membrane.
   • Maintenance schedule and cost for inspections.

6. Quick Take‑Away Summary

With these numbers and steps in hand, you’ll be ready to tackle your window and roof projects—whether you’re a seasoned DIYer or looking for professional help. Happy renovating!