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I have to do a sign (schematic drawing) 12" x 72" will be printed & laminated, The spec calls for the substrate to be 'fire retardent'. I was thinking of dibond but I'm not sure if it qualifies. Any thunks ??
-------------------- Mike O'Neill
It has yet to be proven that intelligence has any survival value. - Arthur C. Clarke
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Do a net search for something called nevamar,they have a website somewhere i just don't know what it is.......there is also a place called flame ratings or flame rated,can't remember which but they provide flame retardent panels for buildings and schools,i dunno how specific you have to comply with it...other than that all the flame resistant coatings people have tried to get us to sell over the years have worked exceptionally well until exposed to actual flame...
-------------------- Gavin Chachere Plotter in the garage,New Orleans La.
"Sgts Shugart and Gordon again request permission to rope down to crash site two" Posts: 1223 | From: new orleans.la. | Registered: Mar 2000
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And to add to Waynes post, invite the architect that designed the specs to come in the day you do all that sanding to be a witness that you are duplicating his specs properly! hehehehehe
-------------------- Bill Diaz Diaz Sign Art Pontiac IL www.diazsignart.com Posts: 2115 | From: Pontiac, IL | Registered: Dec 2001
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Hardie board is a cement based board, available at Home Depot around here. A 4' x 8' sheet of 1/4" is about $17.00. They also make a 12" x 12' x 1/4" plank for soffit work, which is quite reasonably priced (under $10.00). One side will have a woodgrain texture, the other a matte finish.
You can paint it with acrylic latex (no priming necessary) and then apply your graphic to it. The substrate will be fire retardant. I'm sure you could burn the graphics off with a torch, unless they were protected by an overlaminated architect.
Ask them for the fire rating required. Some substrates will burn as long as flame is applied but will self extinguish or only smolder without flame.
-------------------- David Harding A Sign of Excellence Carrollton, TX Posts: 5107 | From: Carrollton, TX, USA | Registered: Nov 1998
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It is known as cement board here. One shop i worked at used it for billboards. Word of caution: those 4x8 sheets can easily snap if picked up the wrong way.
-------------------- Robert Carney Fergus, Ontario Posts: 131 | From: Canada | Registered: Mar 2001
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You are right, it will snap if you're not careful. I started to mention the brittleness of the product in my post and decided not to because I did not know how the sign would have to be mounted. Up there where Mike is, maybe the vinyl won't stick to ice, but the cement board will, if misted before installation. He could have a job guaranteed until spring... Oh wait, it IS spring.
Around here, cement board is used extensively for siding on apartment homes. I used quite a bit for the soffit on my office/shop renovation. I also used it as underlayment on the tile floor.
-------------------- David Harding A Sign of Excellence Carrollton, TX Posts: 5107 | From: Carrollton, TX, USA | Registered: Nov 1998
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There are fire retardant clear coat paints that have rating sheets fire marshals accept. We need to use this stuff on displays for trade shows in many convention centers. There is also the stuff awning companies use. Some of what they want is that if ther is a fire that hazardous fumes are not going to prevent people from escaping the building.
-------------------- The SignShop Mendocino, California
Making the simple complicated is commonplace; making the complicated simple, awesomely simple, that's creativity. — Charles Mingus Posts: 6812 | From: Mendocino, CA. USA | Registered: Nov 1998
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