Hello all,I have a question, basicly , what is MDF? I 've seen it on sim constuction sites, and on BBC america home improvement shows. I know its a builing material. Can it be bought in th U.S.? if so where? Home Depot? thanks all

MDF stands for medium density fiberboard. It's an improved grade of particle board, basically ground up wood glued back together into a solid sheet. It's very heavy, but has a smooth surface and a fair amount of strength. Home Depot carries it.Mikewww.mikesflightdeck.com

I thought it was banned in some parts of America? Something to do with the risk of lung disorders if you breathe in the dust produced when cutting? This is why you're advised to wear a mask ;)

Some wood products, including MDF, made use of a phenolformaldehyde glue that deteriorated with age. Doing so it, released very small amounts of formaldehyde. Normally this would not be an issue, but as houses were built increasingly weather tight, this resulted in a long term exposure at levels sufficient to create health problems. For some people it was life threatening. I do not believe that particular glue is used in indoor applications any longer. In any case, I haven't run across warnings about using MDF, or any "engineered wood product", in indoor applications for quite a few years. For people with allegies or any respiratory issue, a reasonable caution might be to check a wood product's manufacturer's web site for any applicable health warnings. I am not aware of any current warnings, but I am only a casual user of these products and am certainly no expert.Improved glues notwithstanding, I will second your comment about using a mask. I buy masks by the box. I recommend wearing one when cutting or sanding.Another issue when using some of these wood products, particle board in particular, is the inclusion of foreign material. The manufacturing feed stock is saw dust. A good source is saw mills which supply saw dust with dirt and grit mixed in. This can dull your saw blades pretty quickly.Mikewww.mikesflightdeck.com