5/8" vs 1/2" Drywall: What’s the Difference and Why it Matters
When it comes to building or remodeling walls and ceilings, drywall is the go-to material for most residential and commercial projects. But not all drywall is created equal. One of the most common questions that arises is whether to use 1/2-inch or 5/8-inch drywall. While they may look similar, they serve different purposes and perform differently under various conditions.
In this post, we’ll explore the key differences between 1/2" and 5/8" drywall, the reasons you might choose one over the other, and where each type is best used.
1. Thickness and Weight
1/2-Inch Drywall
This is the standard thickness used in most residential interior walls. It's lighter and easier to work with, especially for DIYers or smaller projects.5/8-Inch Drywall
Thicker and heavier, 5/8” drywall is typically used in commercial construction or for special applications where more durability, sound control, or fire resistance is required.
Weight Comparison (per 4’x8’ sheet):
1/2" drywall: ~50–60 lbs
5/8" drywall: ~70–90 lbs
2. Fire Resistance
1/2-Inch drywall can be made with fire-resistant (Type X) cores, but in general, it offers less protection than its thicker counterpart.
5/8-Inch drywall is often required by building codes for fire-rated assemblies, particularly in multifamily housing, garages, and commercial buildings. Its thicker core can delay the spread of fire by up to an hour when used correctly.
Why it matters: Fire-rated drywall is crucial in walls and ceilings that separate living spaces from garages, furnace rooms, or between residential units in apartments and condos.
3. Soundproofing and Noise Control
Thicker drywall helps absorb and dampen sound better than thinner material.
1/2-Inch drywall offers basic soundproofing and is fine for interior walls that don’t need extra noise isolation.
5/8-Inch drywall is preferred in spaces like media rooms, shared walls in duplexes, or areas near noisy mechanical systems.
Bonus tip: Pairing 5/8” drywall with sound-damping materials (like resilient channels or acoustic caulk) greatly improves performance. Drywall products that are specifically made for sound reduction do exist, however, the additional cost for these types of drywall adds up quickly.
4. Sag Resistance (Ceilings)
Ceiling applications demand drywall that won't sag over time, especially when spaced at 24 inches on center.
1/2-Inch drywall is fine for ceilings with framing spaced 16 inches apart (16 o.c.) but can sag at wider spacing or under insulation weight. In recent years, 1/2 -inch drywall has been manufactured at higher densities and these manufacturers state their products can be used in spans greater than 16” o.c. Just be sure to be aware of what your local code requires and the specs on the product you're purchasing.
5/8-Inch drywall resists sagging better and is sometimes the code-recommended choice for ceilings with wider framing (e.g., 24” o.c.).
5. Cost
1/2-Inch drywall is more affordable and easier to handle, making it ideal for most budget-conscious residential projects.
5/8-Inch drywall costs more upfront but can save on repairs, meet code requirements, and offer longer-term performance benefits.
So, Which Should You Use?
| Application | Recommended Drywall |
|---|---|
| Standard interior walls | 1/2” drywall |
| Ceilings (16” o.c.) | 1/2” drywall |
| Ceilings (24” o.c.) | 5/8” drywall |
| Garage walls/ceilings | 5/8” Type X drywall |
| Party walls or shared units | 5/8” drywall |
| Home theaters or sound-sensitive rooms | 5/8” drywall |
| Commercial buildings | 5/8” drywall |
Final Thoughts
While 1/2-inch drywall meets the needs of most home projects, 5/8-inch drywall plays a critical role when code compliance, durability, or noise/fire control is essential. Understanding the differences and your local building code requirements helps you choose the right material for safety, comfort, and longevity.
When in doubt, consult your local building code or drywall contractor—especially in areas like garages, basements, or shared walls—where requirements might mandate a specific drywall thickness or rating.
At MudCo, we don’t just fix drywall—we restore homes and businesses with precision, professionalism, and pride. Whether you’ve got a small hole, a large crack, or extensive drywall damage, our experienced team is here to make it like it never happened.
We proudly provide drywall repair and installation services throughout [insert primary service area], including:
Lake Ariel
Honesdale
Hawley
Waymart
Hamlin
Clarks Summit
Greentown
Milford
and surrounding communities across Wayne, Pike and Lackawanna Counties.
Need a drywall contractor that does it right the first time? Contact MudCo today and let us take care of your drywall project.