A method for production of a fire-retardant, insect resistant, and fungus resistant article, comprising the steps of:
- a) receiving a wood material for incorporation of a fire-retardant, insect-resistant, and fungus-resistant article;
- b) applying a pre-determined amount of an aqueous, non-corrosive, fire-retardant solution to the wood material, wherein the solution includes a fire-retardant agent, methylene diphenyl diisocyanate (MDI), a casein modified liquid melamine formaldehyde resin, and a preservative composition;
- and c) assembling a manufactured fire-retardant, insectant-resistant, and fungus-resistant article.