Professional installation of underfloor insulation may be expensive, costing anywhere from £1200 to £1725 for a semi-detached home. Underfloor insulation installation is a challenging task that may be beyond the capabilities of most amateurs, whether the house has suspended timber flooring or concrete foundations. Additionally, there are expenses for flooring replacement and any floorboards damaged during the removal of suspended floors. Given that it will take a specialist about 3 days to install underfloor insulation, finishing the task yourself will likely save you roughly £500. If you want to install the underfloor insulation, we will help you to provide the best contractors in the UK.