How To Look At A House

McGarry and Madsen's home inspection blog for buyers of  

site-built, mobile/manufactured and modular homes

Why are most pull-down attic ladders not approved by building code for installation in a garage?

Monday, June 24, 2019

The wall and ceiling between an attached garage and the house living area is required to be minimum 1/2” drywall. Most garages have a ceiling secured to the bottom chord of the roof trusses or rafters, and that has to be 1/2” drywall also when the attic is continuous over the garage. There is a high incidence of fires started in garages due to the gasoline and other flammable materials often stored there and the intent is to create a barrier between the garage and house for fire protection.

   But the way it is actually stated in the Residential Edition of the Florida Building Code is a “separation” between dwelling and garage, and as “not less than 1/2-inch gypsum board or equivalent. The International Residential Code (IRC) is similar.

   Most homes have a 1/2” drywall panel installed in the attic access opening, which is fine. But when you put something else in the opening, it must be equivalent to 1/2” drywall, which has roughly a 20-minute fire resistance. The 1/4” plywood panel at most attic ladders does not meet that standard. There are several solutions:

1) There are fire-rated attic ladders on the market, starting at about $800 + installation. Not cheap, and they far exceed the equivalency requirement. Also, there are attic ladders that have had a rated fire-retardant applied to the plywood face, like in the photo below of a label on one.
2) Install a non-fire-resistant attic ladder somewhere in the house instead of the garage.
3) Some jurisdictions apparently allow modifications of the exposed surface of the ladder, such as applying 1/2” drywall to it or painting the wood with a fire-resistant paint. The application of 1/2” drywall seems like a bad solution because the unit will likely end up sagging away from the opening as the added weight overwhelms the closure springs—thereby creating an even worse situation of a direct opening in the attic. It will also probably void the manufacturer’s warranty. And not sure how verification of the fire-resistant paint on the surface of the ladder would be done.

    Anyway, the one sure thing is that an off-the-shelf attic ladder from a big-box home improvement store in the garage ceiling is a definite no-no. But we see them pretty regularly.

    Also, if you look closely at the photo at the top of the page, someone has also added a vent grille (for either combustion air or garage ventilation) in the ceiling that opens directly into the attic; yet another penetration of the required 1/2” drywall garage/attic separation.

    For a more complete explanation of all the garage/house fire separation requirements, go to our blog post What are the code requirements for fire separation between an attached garage and the house?  Also, see our blog post Does an attached garage that is only used for storage or as a workshop, and not for parking a car, still have to comply with building code requirements for a garage?

• • • • • • • • • • • • • • • • • • • • • • •

      Visit our GARAGES AND CARPORTS and STRUCTURES AND ROOMS pages for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.  

Water Heaters

Water Heater Age

"What Are The

Signs Of..."

Septic Tank Systems

Structure and Rooms

Plumbing Pipes

Termites, Wood Rot

& Pests



When It First

Became Code

"Should I Buy A..."

Park Model Homes


Shingle Roofs




Wind Mitigation

Roof and Attic

"Does A Home


Pool and Spa

"What Is The Difference Between..."




Concrete and

Concrete Block

Metal Roofs


Modular Homes

Rain Gutters

Mold, Lead & Other Contaminants


Older and

Historic Houses

Crawl Spaces

Mobile-Manufactured Homes

Building Permits

Life Expectancy

Clay Soil





Exterior Walls

& Structures


Common Problems

HUD-Code for

Mobile Homes

Garages and Carports

Flat (Low Slope) Roofs

Electrical Panels

Sprinkler Systems

Electrical Receptacle Outlets

4-Point Inspections

Hurricane Resistance

Frequently Asked Questions (FAQ)

Home Inspection

Heating and Air Conditioning

Building Codes

Fireplaces and Chimneys

Inspector Licensing

& Standards

Energy Efficiency

Washers and Dryers



Doors and Windows



Electrical Wiring

Click Below  

for Links

to Collections

of Blog Posts

by Subject

Plumbing Drains

and Traps


Smoke & CO Alarms

Aging in Place

Top 5 results given instantly.

Click on magnifying glass

for all search results.






Air Conditioner & Furnace Age/Size


Electrical Switches





Water Intrusion

Electrical - Old

and Obsolete


Foundation Certifications

Tiny Houses

About McGarry and Madsen



Buying a home in North/Central Florida? Check our price for a  team inspection by two FL-licensed contractors and inspectors. Over 8,500 inspections completed in 20+ years. In a hurry? We will get it done for you.

Moisture Problems

Crawl Spaces