---
title: "How to Install 8'0\" Bi-Fold or Bypass Door Slabs"
description: "On this page[Introduction](#)[What Changes for 8-Foot Slabs](#)[QC / Punch Checklist](#) [Doors & Openings](/learn-category/doors/) Skill Level: [Intermediate (Level 2)](/learn/difficulty-levels/#level-2) · Estimated Time: 45-60 Minutes Per Door ## Introduction An 8-foot bifold or [bypass door](/learn/install-bypass-doors/) uses essentially the same installation method as…"
url: "https://letsbuildstuff.co/learn/install-bifold-bypass-slabs-80/"
updated: "2026-10-09"
category: "Doors & Openings"
tags:
  - Level 2
  - Supplemental Guide
---

# How to Install 8'0" Bi-Fold or Bypass Door Slabs

On this page[Introduction](#)[What Changes for 8-Foot Slabs](#)[QC / Punch Checklist](#)

[Doors & Openings](/learn-category/doors/) Skill Level: [Intermediate (Level 2)](/learn/difficulty-levels/#level-2) · Estimated Time: 45-60 Minutes Per Door

## Introduction

An 8-foot bifold or [bypass door](/learn/install-bypass-doors/) uses essentially the same installation method as the standard-height door. This Variant covers the extra reach and possible extra weight. Use it alongside the standard slab installation guide.

Use [the standard slab installation guide](/learn/install-bifold-bypass-slabs-68/) for the base method. Choose the [full bifold guide](/learn/install-bifold-doors/) or [full bypass guide](/learn/install-bypass-doors/) for the hardware system you are installing.

Use the actual door weight and the hardware manufacturer's rating when selecting the track and hardware.

**Which guide do I need?**

- Bypass sliding doors, full install: [How to Install Bypass Doors](https://letsbuildstuff.co/learn/install-bypass-doors/)
- Bypass finish install from a finished opening: [How to Finish a Bypass Door Install](https://letsbuildstuff.co/learn/bypass-door-final-install/)
- Bifold folding doors, full install: [How to Install Bifold Doors](https://letsbuildstuff.co/learn/install-bifold-doors/)
- 6 foot 8 inch opening, track, guides and hanging: [How to Install a 6'8" Bi-Fold or Bypass Door Frame](https://letsbuildstuff.co/learn/install-bifold-bypass-frame-68/)
- 8 foot opening, rough frame only: [How to Install an 8'0" Bi-Fold or Bypass Door Frame](https://letsbuildstuff.co/learn/install-bifold-bypass-frame-80/)
- 6 foot 8 inch door slabs, hanging and fixes: [How to Install 6'8" Bi-Fold or Bypass Door Slabs](https://letsbuildstuff.co/learn/install-bifold-bypass-slabs-68/)
- **8 foot door slabs, bifold or bypass: this guide**

## What Changes for 8-Foot Slabs

- **Extra reach:** use a stable work stool when needed to reach the top hardware, and follow the stool's safety instructions.
- **Possible extra weight:** the taller slab may be heavier. Check its actual weight before choosing the track and hardware; use a heavier-duty system when the door requires it.
- **The base installation stays the same:** follow the standard slab guide and the correct bifold or bypass hardware instructions.

## QC / Punch Checklist

- Doors open and close smoothly without dragging or binding.
- The track and hardware suit the actual door weight and are securely installed.
- Guides and pulls are secure and function correctly.

Written by **David Hospodka**, Sun’s Up Construction

David Hospodka learned finish carpentry from his father, alongside his brother Joel, and worked his way through college trimming houses. He then spent about ten years as a railroad bridge engineer, handling design, construction, maintenance and project management. He came back to finish carpentry full time in 2017.

[About Let’s Build Stuff](https://letsbuildstuff.co/about/)