Firestop Installer

A firestop installer candidate will be responsible for firestop installation work meant to compartmentalize individual rooms to prevent fire, smoke, and toxic gasses from entering or exiting a compromised space. 

A product that expands and provides a carbon barrier to seal off penetrations and retard fire progression. Meant for penetrations and has its limits as a non flexible material(see elastomeric and smoke sections)

Duties: read and understand systems pertaining to desired caulk product. Clean out hole, stuff mineral wool where space is too large for caulk alone, fill with minimum of 5/8ths inch depth(thickness of 1 layer of drywall) of intumescent caulk, crown at Zero point contact(where penetration is touching the hole and cannot be adjusted to fit 5/8th depth), smooth with tool “trowel”, inspect for any gaps or holes (usually on top of penetration)

A product that stretches and compresses with the movement of the building and provides a flexible fire barrier that does not allow fire, smoke, and toxic gasses to pass.

Duties: Meant for top of wall, bottom of wall, wall to wall, edge of slab, and structural penetrations, NOT for use on any kind of combustible penetrations. Clean area of dust, apply mineral wool packing where space is larger than 1/2″ or multiple layered drywall, apply caulk and tool “trowel” flush with the wall or edge of slab it is being applied to, check for gaps and thin material spots.

A product that stretches and compresses with the movement of the building and provides a barrier against the passage of smoke, toxic gasses, and has a sound dampening property. 

Duties: Meant for all penetrations, top of wall, wall to wall, and bottom of wall on non-rated walls. NOT for use on any rated walls. Similar duties to intumescent and elastomeric caulk but provides no fire rating can be used over the entirety of the wall.

A product that includes strips of intumescent material contained within to provide protection to critical communication and data lines through a rated wall. Has a maximum fill ratio and is a contained system with intumescent rings secured to the wall with brackets.

Duties: Prep holes by cutting away drywall in specific areas and heights not to exceed 1/2″ gap anywhere around the sleeve to assure a proper seal. Square sleeves connect to each other and should be installed in sets. Round sleeves are stand alone sleeves that require individual holes cut for them whether using individual rings or gang plates(group set brackets). Caulk is not necessary.

A product that is metal on one side and intumescent on the other. To be installed intumescent side towards barrier being sealed. 

Duties: Measure 4x cut once. A pricy and unforgiving product that has sharp edges and thin wires that could poke. Measure the opening, measure the penetrations in the opening, transfer measurements to mockup(such as cardboard), cut mockup and add or subtract from the mockup until everything lines up and is tight to the penetrations with a 2″ overlap beyond the opening over the barrier being sealed. Transfer mockup to composite sheet making sure it is transferred to the correct side of the composite sheet, cut with tin snips or skill saw, carefully (very sharp) install on to opening being careful to not bend it more than necessary, fasten to barrier, apply caulk or putty around penetrations to seal to composite sheet, seal any cuts in the composite with intumescent caulk covered with 16ga steel strips or excess strips of composite sheet. 

An intumescent product that never hardens or dries used for the ends of conduit, a penetration gap filler for composite sheet, in-wall junction boxes and med gas lines, and openings that will require future access. 

Duties: Prep area to clean away dust and other contaminates so it seals properly in its use, remove protective layers, apply to the exterior of in-wall j-boxes or to the end of conduits penetrating the wall. Hilti has a tougher putty that is firmer and easier to give shape to. STI is easier to manipulate but leaves a residue and can be accidentally made too thin very easily. 

An endothermic wrap with chemically bound water particles meant for critical communication lines. This product, when heat is applied, will release that water to wick away the heat and keep the critical lines from melting.

Duties: Bundle wires where applicable. Measure sections and cut for designated amount of wraps per system requirements, wrap first section and fasten with aluminum tape and a banding product, wrap subsequent sections while overlapping onto previous e-wrap as per system requirements, foil tape, and band it all together.

A sprayable caulk meant for larger gaps.

Duties: Prep area by cleaning out section of all excess dust and debris, stuff mineral wool flush with surface of barrier, spray material in a pushing fashion back and forth until desired thickness is achieved and all corners and gaps are filled with material, clean off all overspray from surrounding surfaces. When doing edge of slab in studded walls, start with the inside of the studs, they are the most easily missed parts and have the highest chance of gaps in material. 

An exterior wall product meant to replace tyvek to provide a water and vapor barrier to protect against water and mildew. 

Duties: apply seam filler to all seams and screw heads on exterior wall, tool “trowel” material flush with the wall and scrape away excess buildup, apply flashing caulk to window and door openings connecting the drywall to the framing studs (use as little as possible as this is a very goopy and sticky material that spreads very far and does not wash out of clothes, hair, or skin), apply spray material in a smooth consistent fashion testing depth every 5′ section until desired thickness is achieved. This may require 2 or 3 applications depending on the required thickness as this material can slump if too much is applied at once. 

A foam infused with intumescent material meant for large conduit openings to plug and allow easy future access.

Duties: get the correct muffin for the size pipe you’re sealing, bundle wires into the center of the pipe to judge what you will need to cut out of the middle of the muffin, slide wires into muffin(centered), slide muffin into conduit leaving no more than 1/2″ sticking out of the end.

A flexible and waterproof product designed for specific instances, cannot be painted over.

Duties: Prep area to clear it of dust and debris, stuff mineral wool as required, apply caulk starting with the edges, tool it to the edge to remove air pockets and gaps, fill in the middle, smooth with tool flush to the surface of the barrier, clean tool and any accidentals with solvent material, typically mineral spirits or toluene. 

An exothermic expanding foam with intumescent, meant for very niche applications where all other products are unviable. 

Duties: prep area to clear it of dust and debris. For floor applications a barrier below is required to catch any foam that didn’t get a chance to expand. For all applications direct nozzle into work area and apply liberally around the penetrating object first, then apply to barrier to fill in all gaps and spaces. This is a timed 2-part product so caution is advised. It will seal itself in the tube if not fast enough(within 2 minutes of mixing) and due to its exothermic reaction any skin it gets onto will give 1^st degree burn to affected area. This does not wash off of clothes, hair, skin, or any surface. Use with extreme caution. 

An expanding smoke seal foam. NOT for use on ANY rated walls. 

Duties: Typically, the Fire-Seal duties when it comes to this product is strictly removal. It must be cleared from the opening in its entirety. If on drywall, scrape drywall until just gypsum is left around penetration and none is on penetration. If in concrete, scrape away as much as physically possible from concrete and penetration before applying intumescent caulk. 

An intumescent foam brick product used for larger openings.

Duties: measure opening, prep by cleaning dust and debris from opening, cut and place bricks in an offset pattern, just like with cmu walls, fill between wires and pipes with small cuts of foam brick where available, caulk between bricks and barrier, caulk around penetrations to seal all gaps. Bricks should be placed in a way that extends the full thickness of the barrier. 

Similar to the Bricks in application but are far more compressible. 

Duties: same as foam bricks with the caveat that it will require a retaining screen added to available sides to keep the pillows contained in the opening and they cannot be cut. 

An intumescent product that comes in field applied strips or contained collars with intumescent strip manufactured within it. Meant for =/>3″ combustible pipes and must be secured to a surface.

Duties: Collars require the penetration to be caulked flush to the wall first, then the collar can be applied to the penetrant. Once fastened with the designed hooks, all provided tabs must be secured to the wall with appropriate screws and/or anchors. Wrap strip are part of a field assembled collar where either conditions don’t allow a collar or collars aren’t designed to go. While referencing the system or engineering judgment you are required to prep as with the collar and achieve nominal continuous or off-set amount of wraps secured first by foil tape then a field prepared retaining collar secured with worm gear clamps and system specified amount of tabs attached to the barrier. These can be applied over composite sheet, but cannot be secured over foam bricks or pillows.  

An insulation and backer material we use universally on all job sites. Made from melted and spun rocks to provide insulation with a higher thermal critical point than fiberglass. This is going to be your best friend and worst enemy. 

Duties: Observe the material and figure out how it is layered. The finished surfaces on the top and bottom are to always be compressed between the opening and the penetrant. The layers should always be pointing towards you and compressed to fill the opening. You are to NEVER caulk or spray the finished surface as it will peel away in layers. Always wear protective gloves to prevent knife and obsidian cuts, always wear safety glasses to prevent particulates from entering your eyes, never touch your face after handling mineral wool. It is an inert product and wont hurt you, but it will easily cut and irritate any open skin or mucous membrane. 

• Construction experience preferred, but we’ll train the right candidate

• Attention to detail & commitment to safety

• Ability to work at various commercial job sites

• Must be comfortable working with tools and physical labor

· Salaried position (compensation based on experience)

· Medical, Dental, Vision, and Life coverage 

· Paid Time Off

· Dog-friendly office