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Toughening an entry door against fire is a method of making a home safer by helping contain a dangerous fire and preventing its rapid spread. Two methods are often used to do this. One is to apply a surface coat that retards the burning of the body of the door. Another is to fortify the door itself by changing the properties of the wood through soaking in a mineral solution.

The former method mentioned of changing the surface properties is accomplished via a resin that is known as a light intumescent. Heavy intumescents and endothermic polymers were used in prior times but are not used so much because when exposed to great heat they tend to give off a lot of smoke that obscures the area of the fire emergency.

Resin coatings do not make a door immune to fire but merely slow down the advance of the flames and increases the time it takes for the flame to penetrate the surface. Resins are applied with a brush onto the surface much like paint. After application, moisture tends to reduce the effectiveness so the environment should be kept dry.

The second way of fire proofing is to soak the entire door, as long as it is not yet painted and finished, into a solution. Commonly ammonium or zinc salts are used. After soaking and drying these woods become highly impervious to heat. However, the second method is much more labor intensive than the first.

A very new kind of door is the fiberglass door. Strands of glass are bonded with a resin-like compound in a door-shaped mold. The finished product is a door that’s solidly constructed with hardened glass but still contains the flexibility of resin.

The surface of fiberglass could be made to look like traditional wooden doors, but without the disadvantages of warp-age and cracking. Fiberglass doors are also known to be very tough and have warranties that go until 30 years. One downside is that fiberglass doors are hard to fix other than for the most minor of damages.

The writings supplied for fiberglass exterior doors will be informative to many. Readers wanting to know more can browse over to learn about custom fiberglass exterior doors.