STI is the industry leader in developing firestopping systems for wood-framed construction. Wood frame remains a very popular method of construction. Both cost effective and sustainable, wood frame structures for residential multi-family, dormitories, senior housing, and more are prevalent. Building codes, including the International Building Code® (IBC) and Canada’s National Building Code, include provisions for building out of wood, including structures up to five or six stories in height. As these structures soar to new heights, proper firestopping is essential, and STI can help.
Wood shrinks, and that is a known fact. Buildings can also settle, and in some areas of the country, may need to be designed for seismic situations. That is why STI formulated WF300 Firestop Caulk, a product specifically intended for use in wood frame construction. During installation, the product is great for overhead applications and it offers excellent adhesion to wood and gypsum. Once dry, it forms a flexible membrane that can accommodate various building movements. Any gaps or voids that may develop due to excessive shrinkage or building settlement can be accommodated under fire exposure conditions because the product is intumescent and will expand with heat to form an insulative char. Most competitive products offered at the same price point are non-intumescent products, which should be avoided since they lack the ability to expand with heat and seal off any gaps or voids.
Plastic pipe is common in wood framed buildings, and only STI has the most comprehensive solutions for wood frame buildings and plastic pipe. Our WF300 caulk is engineered to be safe for use with most common plastics, and STI has had products evaluated according to several manufacturers’ screening programs*. Additionally, our powerful line of intumescent wrap strips and firestop collars makes easy work of even the most complex piping systems. Capable of intumescent expansion up to 60x and backed by the most comprehensive package of UL Certified Systems, STI is the right choice for your next wood frame project!
*Please review Product Data Sheets and consult with plastic pipe manufacturers for more complete information on known chemical sensitivities associated with piping systems.
STI knows wood frame construction, and our UL Certified Systems are diverse enough to cover a wide array of lumber plate designs. Systems are available for a variety of different conditions, including the following:
Not all products carry the same ratings or range of coverage, so it is important to consider the versatility of both the products and the associated UL Certifications. STI helps you rest easy; we have you covered.
Membrane penetrations are penetrations of service elements (e.g. pipes or cables) or boxes (e.g. electrical or utility) that penetrate a single membrane of a fire-resistive rated assembly. STI offers unmatched expertise. Here are a few of the common types of membrane penetration systems STI offers:
Call our Tech Service to learn more!
When it comes to dwelling units, acoustics matter! The IBC® even has specific provisions for maintaining STC Ratings in these occupancies. STI products and systems are evaluated for acoustical performance to help maintain acoustical ratings.
Fireblocks are required at locations where concealed spaces must be blocked to resist the passage of flames and hot gases.
BlazeStop® WF300 Intumescent Firestop Caulk is a latex-based firestop caulk designed for residential wood frame construction. WF300 Caulk is tested for addressing penetrations through wood/frame construction such as wood stud walls and floor/ceiling assemblies. Under fire exposure, WF300 expands to up to four times its original volume.
SpecSeal® SSP Firestop Putty excels at sealing cabling penetrations and outlet boxes. SSP Putty is non-hardening and easily hand works around grouped cabling penetrations forming a re-enterable seal allowing for future work. When applied with outlet boxes, SSP Putty easily works into voids and seams forming a continuous seal against fire and the products of combustion.
SpecSeal® EP Powershield™ Electrical Box Inserts install within steel electrical boxes directly against the back of the box. Powershield™ Box inserts are equally suited for remediation as well as preinstallation before the boxes have made it to the job site. Powershield™ Box inserts incorporate pre-scored openings allowing for easy installation around ground lugs.
SpecSeal® LCC Firestop Collars are factory-manufactured firestop devices sized to plastic pipes of up to 4 in. Trade Size. LCC Collars consist of a restraining collar with a factory applied intumescent ensuring the correct amount of material is applied every time. Simplify the process of firestopping combustible piping by taking the guess work out of estimation with SpecSeal® LCC Firestop Collars.
SpecSeal® RTC Firestop Collars adapt to the size combustible pipe that you are working with. One collar is designed to address standard 3 in. & 4 in. plastic pipes as well as their associated couplings. RTC Firestop Collars adaptable nature make them an excellent tool to have at hand when bringing combustible penetrations up to code.
SpecSeal® SSW Wrap Strips are available in a variety of sizes and types to tackle any combustible penetration. SSW Wrap Strips are available in 12 ft. rolls as well as individually pre-sized strips to minimize waste and speed up installation. When installed in conjunction with restraining steel, SSW Wrap Strips are able to collapse non-metallic piping of up to 12 in. diam.!
SMOKEBLOCK® Caulk is a non-combustible gun grade sealer for fireblocking and draft stopping in wood frame walls and floors. SMOKEBLOCK® is designed for filling annular spaces around penetrants and along seams throughout the building envelope and is suitable for use in one or two family dwellings. Not Suitable for Use in Fire-Rated Construction.
SMOKEBLOCK® Fireblocking Foam installs in seconds filling voids and annular spaces around penetrants preventing the spread of smoke and toxic gasses. SMOKEBLOCK® Fireblocking Foam can be applied in both vertical and horizontal applications and is suitable to use in one and two family dwellings. Not Suitable for Use in Fire-Rated Construction.
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STI’s Wood Frame fire & smoke products
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STI warrants that its products will be free of defects for one year from the date of purchase. In the event a product does not conform to this warranty, the sole and exclusive remedy is, at STI’s option, replacement of the product or refund of the purchase price. The warranty provided herein shall be void and of no effect in the event that the product is not installed in accordance with STI’s published instructions, listed systems and applicable building and safety codes. THIS WARRANTY IS IN LIEU OF ALL OTHER REPRESENTATIONS AND EXPRESSED OR IMPLIED WARRANTIES (including the implied warranties of merchantability or fitness for a particular use) AND UNDER NO CIRCUMSTANCES SHALL STI BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING, WITHOUT LIMITATION, ANY LOSS OF REVENUE, PROFIT OR USE. Prior to use, the user shall determine the suitability of the product for its intended use, and the user assumes all risks and liability for subsequent use. No person other than an officer of STI is authorized to bind STI to any other warranty for any product for which this warranty is issued.
Did you know that many specifications for firestopping reference older fire test standards or obsolete products?
Let our firestop experts assist by reviewing your firestop specifications and making appropriate recommendations. STI provides this service free of charge.