Moisture-Resistant Materials to Inhibit Mold

Some construction materials hold up better to flooding, water damage and mold than other materials. Moisture-resistant materials to inhibit mold are available and should be utilized.

There are a number of materials that prevent moisture damage, they may actually be slow in drying. When materials such as tile and plywood are used together, drying time may be reduced. However, water may be trapped behind and under surface materials. Before selecting material combinations for walls and floors, consider length of drying time if water were to be trapped inside the combinations, or in the wall or floor systems. The combination should allow drying in at least one direction. Consider the following questions before you make a final decision. Which way can water drain and dry out? Will the surface material have to be removed from the combination to allow drying? Is the surface material easy to remove to allow drying time? See What is Moisture?

Even with water-resistant materials, some damage may occur if a home is flooded. Clean up is necessary and painting and water damage repairs may be needed.

The following is a partial listing of materials that may resist water damage and mold:

Moisture-Resistant Insulation

• Foam or closed-cell rigid insulation, including extruded polystyrene or polyisocyanurate, is not damaged by water and resists surface mold growth. This kind of insulation generally allows the wall and floor systems to drain and dry.

• Fiberglass insulation resists water damage and surface mold growth. However, the insulation may trap and hold water and slow drying time of wall and floor systems. Fiberglass insulation usually has to be removed.

 Moisture-Resistant Materials for Walls

• Steel with waterproof coatings for beams, plates and steel studs.

• natural decay-resistant wood s

• Cement boarding.

• Bricks.

• Waterproofed mortar for stone.

• Clay tiles that have been glazed.

• Ceramic veneers or tiles.

• Concrete.

• Glass panels or blocks

• Artificial stone veneer.

• vinyl window frames

• Metal exterior doors – corrosion-resistant

Use non-paperfaced gypsum wallboard or cement board. They provide more moisture to inhibit mold than regular paper-faced wallboard.

Moisture-Resistant Floorings

• Concrete materials such as concrete tile, pre-cast concrete, or latex or bituminous formed-in-place can be colored, polished, and sealed.

• Non-porous stone, slate, or cast stone with waterproof mortar.

• Clay tile, quarry tile, terrazzo, or ceramic tile.

• Rubber sheets or tiles.

• Naturally decay-resistant wood subflooring (redwood, cedar, some oaks, bald cypress) or steel for structural members. However, wood can warp. Unless the finished flooring is removed immediately to allow the subfloor to dry, it may become damaged and moldy.

• Solid plastic lumber (may inhibit drying).

• Waterproof mortar or adhesives (may inhibit drying of the subfloor).

• Mastic or silicone, epoxy, or polyurethane formed-in-place.

Moisture-Resistant Paints, Coverings and Coatings

• On an inner wall latex paint lets moisture pass through dry though it may blister or discolour.

• Oil or alkyd-based enamels and paints and can hinder drying.

• Moisture resistant in itself, ceramic tile can hinder drying of water soaked material behind it.

• Vinyl wall panels and coverings can also slow wall materials behind them from drying effectively.

Other Moisture-Resistant Items

• Try foam-filled metal or fiberglass exterior doors.

• Use stainless steel or galvanized nailscorrosion-resistant hinges and galvanized or.

• Use water-resistant mortar

• use water-resistant adhesives

• use corrosion-resistant hinges