rigid insulation board


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hardboard

A building material manufactured of wood fiber compressed into sheets; used extensively in building, e.g., as interior panels or durable siding.
References in periodicals archive ?
Internally, rigid insulation boards are fitted to the wall, or a stud wall is built and filled in with insulation material.
You should lay the insulation between the joists and then across them at a 90-degree angle to create two layers, although rigid insulation boards are useful if you want to board over the loft for storage.
Although siding alone offers minimal resistance to heat flow, there are a number of rigid insulation boards available that can be applied to a wall before siding is installed.
There are lots of different loft insulation materials to choose from, including rigid insulation boards, which are useful if you want to board over the loft for IT'S important hatch when the loft.