You want a cool practice space. You want to put fabric all over the walls to help diffuse the sound and cover up the holes in the garage or the basement walls or even your own room. Or maybe you want to put up a wall of curtains on wire to pull across the walls. It is ok to do... if... and this is a
big IF...
you use flame retardant fabric from the get go or you buy fabric and then flameproof the fabric by spraying it. (It is never OK to use regular foam on the walls even if you try to flameproof it.)
This isn't funny. 100 people died in a night club fire because the soundproofing wasn't flameproof.
Thankfully, this is the web, and I can link to a great fireproofing science experiment website where Janyn M did a handy experiment to SHOW people the difference between regular cotton fabric and fabric treated with flame retardant. As her tables show, there is a huge difference in the time it takes untreated fabric to burn versus treated fabric. Imagine being in a room covered with fabric that takes 2 seconds to catch on fire and all the fabric burns rather than 60 seconds to catch on fire and 86% of the fabric DOES NOT burn!
So -- we got cheap fabric to put on the walls of our own garage, (we got cotton at $1 a yard) but we had to flameproof it. Let me tell you, finding flame retardant spray was tough! Especially if you want to cover a whole two-car garage with fabric! I was finally able to purchase it at Backstage Hardware -- they ship UPS! While you can't order online, just call and they will ship it to you! (And all of you Halloween Haunted House flame retardant people looking how to build a Haunted House with fabric and other materials, this usually includes PTA's, PTO's, and camps, you can call them too!)
Depending on what you put on the walls, there are different products to use:
Roscoflamex C26
Roscoflamex C26 is a concentrated flame retardant that works with water absorbent theatrical textiles, paper products, cotton, muslin, canvas, cardboard and other cellulosic materials.
It is approved by the New York City Board of Standards and Appeal under Calender Number 1287-80-SM and has received a Certificate of Test from the Better Fabrics Testing Bureau, Inc.
Roscoflamex S33
A pre-mixed ready-to-use, clear liquid, Roscoflamex S33 effectively flame treats many synthetic fabrics, such as polyester, nylon, acrylic and rayon. It also treats cotton blends including cotton/poly, cotton.nylon, cotton/acrylic, rayon/nylon and rayon/acrylic.
Registered with the California Fire Marshall.
Roscoflamex W40
Roscoflamex W40 effectively flameproofs untreated wood, plywood, cellulose board, accoustical board and corrugated paper.
Registered with the California Fire Marshall.
Roscoflamex P50
Roscoflamex P50 is an additive for water based Rosco Paints. Designed to be added directly to Roscopaint, one 12 ounce jar of P50 makes one gallon of fire retardant paint without altering the the color.
Registered with the California Fire Marshall.
If you have some leftover, put it on some drapes in another room! (Basically, we used a spray bottle to saturate the material.)
Now, you can always purchase the fabric that is already flameproof. One example is to use duvetyn. Duvetyn is a black soft fabric (perfect for at least one wall unless you want to practice in a cave) that is already flameproof. Of course, you can't wash it. You can also get this at $6.99 a yard at Backstage Hardware, or a 50 yard bolt for $271.50 (these prices were current when I posted.)
So, if you are going to rock out in style, please rock out safely!
And, if you are truly looking to build a professional studio and want to build room treatments the way the pros do, I highly recommend reading Rod Gervais: Home Recording Studio: Build it Like the Pros. He goes into bass traps, reflection control, absortion coefficients -- and fire safety.
(If you have any other ideas for a practice space, I would love to hear them!)