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Atlas Drywall Phoenix provides fire rated drywall installation in Phoenix, AZ for commercial corridors, tenant separations, and shaft walls. We follow UL listed assemblies, proper fastener patterns, and fire caulking details to help meet code requirements. Our team understands inspections and documentation. Protect your building with correctly installed fire rated partitions and ceilings.
Atlas Drywall Phoenix provides professional fire rated drywall installation throughout Phoenix, AZ, Arizona and the surrounding area. Our licensed, insured crew delivers safe, clean, on-time work with a free estimate before anything begins. Call (602) 600-0313 or request your free quote.
Fire-rated drywall solutions tailored for Phoenix buildings
Fire-rated drywall installation is not just a code box to check. In the Phoenix area, it is a practical layer of protection between high heat, busy electrical systems, and the people inside your building. At Atlas Drywall Phoenix, we design and install fire-rated assemblies based on your exact space, whether you need a rated corridor in an office, a demising wall between suites, a garage separation in a home, or a shaft wall for multi-story buildings.
We start with a walkthrough of your property and a review of your plans or existing layout. For many projects, we coordinate with your architect, contractor, or fire marshal to confirm the required fire rating (often 1-hour or 2-hour) and where it must be applied. We identify penetrations, door openings, and intersections with existing walls or ceilings, since those details are where fire-rated assemblies most often fail inspections. From there, Atlas Drywall Phoenix proposes specific UL-listed assemblies that meet Phoenix and Maricopa County codes instead of guessing or improvising in the field.
In our climate, attic heat, dryer vents, and attached garages are common ignition points. We pay special attention to separations between garages and living spaces in homes and townhomes, corridors in apartment complexes, and tenant separation walls in small retail centers. These are typical trouble spots inspectors flag if the correct type and thickness of fire-rated drywall is not used.
How fire-rated drywall and partition walls are actually built
Fire-rated drywall installation is all about creating a tested system, not just hanging a special sheet of gypsum. For most 1-hour interior partitions, we use Type X fire-rated drywall, usually 5/8 inch thick, on metal or wood studs spaced at 16 or 24 inches on center, depending on the approved assembly. For higher ratings or specific UL designs, we may install multiple layers of Type X or Type C board, stagger the seams, and use a particular screw pattern and length.
Once the framing is confirmed and plumb, our crew begins board layout so seams land on studs and do not stack on opposite sides of the wall unless the assembly allows it. For multi-layer systems we offset vertical and horizontal joints, then fasten each layer with screws that meet the tested design. We pay close attention to corners, top track, and areas where walls meet concrete or existing framing, since gaps here can reduce the actual fire performance.
After hanging, we tape and mud all joints using setting-type joint compound on fire-rated assemblies that may be exposed to temperature swings, like in stair towers or exterior corridors. This compound hardens chemically, which is more stable in Phoenix heat than air-drying mud alone. We embed joint tape, fill beveled edges, and fully cover fasteners. For areas where fire rating must be maintained but appearance is less critical, such as above drop ceilings, we still complete the fire-taping properly even if you do not want a full level 4 or 5 finish. The goal is to match or exceed the tested assembly so your inspector can sign off on the first visit.
Fire-stopping details that keep your wall actually fire rated
A wall can be built with the right board and still fail if the penetrations are not treated correctly. That is why Atlas Drywall Phoenix pays close attention to electrical boxes, plumbing lines, ducts, and data cabling that pass through fire-rated partitions. We work with specialized fire-stopping products such as intumescent caulks, putty pads, and fire-rated sealants, and we apply them according to the listing that matches your wall type.
Common weak spots are back-to-back electrical boxes, oversized holes around pipes, and unsealed joints where the wall meets the underside of the roof or floor system. Our installers are trained to keep boxes appropriately spaced or to use box protection when spacing is tight. We tightly cut openings around pipes and then seal the annular space with the specified fire-stopping material, not generic caulk or foam. At the top of the wall, we seal the gap between the drywall and structural deck or top track so fire and smoke cannot leap over the partition.
In older Phoenix buildings that are being remodeled, we often find partial or damaged fire partitions that no longer match any tested assembly. Instead of guessing, we document the condition, then either repair to match the original listed system or propose a new assembly that the city can approve. This attention to detail matters during tenant improvements where multiple trades are working. We schedule our fire-rated work so we can come back after electricians and plumbers finish to check that no one has compromised the rating by cutting new holes or removing fire-stopping.
What drives the cost of fire-rated drywall installation in Phoenix
Homeowners and property managers usually ask why fire-rated drywall installation costs more than standard drywall. The increase comes from the board type, extra layers, additional framing details, and the time it takes to handle fire-stopping and inspection requirements. Type X or Type C board weighs more than regular drywall, which affects labor and sometimes requires more crew members or lifts, especially on higher walls and in commercial spaces.
The number of layers and the fire rating are big cost drivers. A single-layer 1-hour separation between a garage and a house is relatively straightforward. A 2-hour corridor or stair enclosure with two layers of 5/8 inch board on each side of metal studs, full fire taping, and multiple penetrations will take more time and materials. Height also matters. A 10 foot wall is simpler than a 20 foot demising wall in a warehouse that needs lifts, longer studs, and careful bracing.
Local scheduling and inspection timelines in Phoenix play a role too. The cooler months are popular for large commercial projects, so if you need a fast turnaround on a restaurant build-out or office TI, it helps to get Atlas Drywall Phoenix involved early so we can lock in crew availability and coordinate inspection dates. Summer heat can limit how long crews work on exterior-adjacent areas in a single stretch, which we factor into our planning rather than rushing and making mistakes. We are always clear about pricing up front. During our estimate we break down materials, labor, and specific upgrades like higher STC sound partitions that are both fire rated and designed to reduce noise between units.
How Atlas Drywall Phoenix guides you from plan to inspection
Whether you are a homeowner adding a new attached garage, a landlord separating units, or a GC handling a commercial TI, our process is designed to make fire-rated work straightforward. We begin by reviewing your plans or, if you do not have drawings, walking the space and talking through how you use it. We confirm which walls actually need to be fire rated so you are not overbuilding areas that do not require it.
Next, Atlas Drywall Phoenix selects specific tested assemblies and explains them in plain language. For example, we might recommend a 1-hour corridor wall using 3-5/8 inch metal studs at 24 inches on center with one layer of 5/8 inch Type X on each side, or a 2-hour tenant separation wall with two layers per side and acoustical insulation in the cavity. We consider not just code, but also your needs for sound control, future access to utilities, and how the wall will be finished. If needed, we coordinate with your architect or engineer to ensure our selections match the permitted set.
During construction, we schedule rough and final inspections around your other trades. We document assemblies and fire-stopping methods so if an inspector asks, we can show precisely what was used. If an inspection note does come back, we correct it quickly, whether that means adding extra screws in a certain area, re-taping a joint at the deck, or adding fire-stopping around a missed penetration. After completion we walk the space with you, point out all fire-rated partitions, and explain what future work could affect the rating, such as cutting in new recessed lights or adding extra openings. This way you know how to maintain the protection you just invested in.
