Home Building Insights - Building With Breven

Behind the Walls: HVAC, Plumbing & Electrical in Home Construction


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Episode 32: Mechanical Rough-Ins – Plumbing, HVAC & Electrical in Custom Home Building

In this episode of Building With Breven, we continue our 7-part mini series breaking down the full process to build a home, step-by-step. Inspired by our most popular episode (Ep. 22), we’re diving deep into Step 4: Mechanical Rough-Ins—a critical stage in home building that happens right after framing and before insulation or drywall.

If you want to understand how to build a home the right way, this is one of the most important (and often misunderstood) phases in the home construction process. Host Steven Byrnes of Breven Homes walks you through the key components of the mechanical rough-in phase, including plumbing, HVAC, electrical, and more.


In this episode, you’ll learn:

🔧 Plumbing Top-Out

  • Fixture locations and planning for long-term functionality

  • PEX, trunk-and-branch systems, and efficient water distribution

  • Sewer line (head) testing and water supply pressure testing

    ❄️ HVAC Rough-In

  • Ductwork layout: returns, supplies, plenums, and copper lines

  • Condensate drain lines and how the system ties together

  • What a duct blast test is and why it matters in custom homes

    ⚡ Electrical Rough-In

  • The electrical walk-through with your builder or electrician

  • Placement of breaker panels (main and subpanels)

  • Visual inspections and planning for future electrical needs

    📡 Low-Voltage Systems

  • Smart home prep: speakers, internet, cable, cameras, and media

  • Prewiring for security, video doorbells, and future upgrades

    🐜 Bonus: Pest Control

  • Why some homeowners install pest control systems in the framing stage

Whether you’re working with a builder or managing your own custom home project, this episode will help you gain the confidence to make the right decisions when it comes to mechanical systems in your future home.

At Breven Homes, we believe knowledge is power—and understanding each stage of home building helps you avoid costly mistakes and build smarter.

🎧 Tune in now to learn how to approach the mechanical phase like a pro and move one step closer to completing your dream home.

🔗 Visit buildingwithbreven.com for checklists, visuals, and more resources on how to build a home.

📱 Follow @brevenhomes on Instagram for behind-the-scenes insights into real home construction projects and expert custom home tips.

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Home Building Insights - Building With BrevenBy Breven Homes - Home Building Experts and Consultants

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