Types of Underfloor Insulation
There is a range of underfloor insulation materials available each with their pros and cons.
Polyester underfloor insulation sections: higher density sections that are easily squeezed in between joists and are self-supporting without staples or straps. Polyester insulation is moisture resistant. Polyester insulation blanket: can be stapled snugly into position by professional installers. Stapling underfloor where there are live wires can be dangerous for DIY installers. Fibreglass underfloor insulation: this material is low density and is used extensively in ceilings and floors but underfloor can be affected by the damp conditions. Foil underfloor insulation: was used extensively years ago for reducing radiant heat loss. It's effectiveness is lost when it is tarnished or corroded, collects dust or condensation, gets ripped or damaged. Due to risk of electrocution in working with a conductive material around electrical wiring - extreme care must be taken with installation. Installing foil insulation is not an accepted underfloor insulation option under the Residential Tenancies Act. Polystyrene underfloor sheets: these are rigid sections that have been used extensively in the past. The polystyrene must be isolated from TPS wiring for safety as it can be affected by the polystyrene material. Some forms claim to be self supporting but require tacks or fittings to hold them in place.