Installing tape to secure the tape duct can be done before or during tape installation. It is not necessary to install tape on the entire length of the tape duct, but it may be necessary for some applications. If there are many penetrations through your fire barrier, you should consider wrapping tape around penetrations and then securing with adhesive spray. The method and amount used will vary depending on the application and manufacturer’s recommendations.
Adhesive spray, also known as an adhesive accelerator, sprayed along each side of tape after it has been installed will help relax wrinkles and help tape adhere better to your fire barrier (paint or drywall). During construction, if time permits, it is best to pre-stress tape by spraying adhesive on one side only while the tape is still loose. Pressure tape tightly to fire barrier, anchor tape with staples or nails, stand back, and enjoy the show when the tape comes alive under pressure! For latex tape only, use a heavy spray (30 maximum psi) in a maximum-size pattern consistent with code requirements; cover tape completely; allow 20 minutes for swelling before wrapping tape around penetrations.
When installing tape on your fire barrier, you should remember that tape should not be wrapped too tightly. This will cause the tape to buckle and wrinkle when it contracts. It is much better to leave some slack than to wrap the tape too tight because you can easily adjust any wrinkles out by simply pulling the tape away from the wall slightly. After installation, the performance of your tape will vary depending on where you store your tape during tape installation. If the tape is stored on a dry flat surface, it will perform better than tape, which is rolled up and bent repeatedly.
When applying tape to your fire barrier, always make sure that you apply tape as close as possible to the ceiling without allowing the tape to touch the ceiling. This will greatly reduce the chance of smoke migrating through walls and ceilings, relieving pressure buildup between tapes, thereby eliminating wrinkles and keeping the tape seal tight. Rolled tape should be installed laying down or standing up with adhesive side out and not rolled paper side in. Also, all joints should butt tightly with no open spaces for smoke leakage. When applying the tape, always keep the adhesive side up so the paint does not stick to it! Keep your fingers off the tape as much as possible to avoid oil contamination!
Remember tape will stick to paint, and latex is water-soluble, so the tape can not be installed over the existing tape. Where tape may touch the previous tape, you should install a plastic release film such as an artist’s tape or painter’s tape before applying your new tape. This tape will provide just enough room to allow the two tapes to separate when pulled apart. Remember, no tape touching is a good tape. When in doubt, add another layer of protection! Remember, when installing tape on drywall, always make sure that you add some sort of moisture barrier (plastic sheet) between your fire barrier and wood, or any other combustible material for that matter.