the device for installing batts of insulation in preexisting structures comprises a control sheet having a substantially flat elongated surface for receiving a batt of insulation , a first end having a handle , and a second end which is free for insertion into a wall opening , and a compressor sheet having a substantially flat enlongated surface for overlying the control sheet flat surface to compress a batt of insulation therebetween , a first end having a handle , and having a second end which is free for insertion into a wall opening . a latch is provided for connecting the control sheet second end to the compression sheet second end such that the sheets are maintained a predetermined distance apart to compress a batt of insulation and the compressor sheet second end and the control sheet second end overlie one another . the latch includes a release for releasing a batt of insulation after insertion into a wall opening .