Insulating a Poured Concrete Wall After The Temporary Forms are Removed
This video shows the process for installing rigid insulation on the interior surface of a poured concrete wall. This would be the same process that could be used on a cement block wall. In this case the wall was formed with wood or metal masonry forms held in place by through bolts, washers and nuts to achieve the correct wall thickness. These forms are then removed after the concrete sets up. These forms are either rented by the job or owned by the concrete contractor. This is a common system used in commercial construction especially in unconditioned spaces (no heat or air conditioning) like parking garages. This is also common in residential construction for basements. The shortcoming of this method is lack of insulation and lack of attachments for finish surfaces like drywall, outlets, cabinets etc. Concrete block walls share this same shortcoming and if not filled with concrete, additional care must be taken locating hole to attach the wood strapping to the concrete. Any additional insulation and attachments (known as furring out or building out) adds cost and reduces space in the home. Removing the rented forms the day after the concrete sets up stops the process of the concrete curing to a large degree as concrete strengthens the longer you allow it to cure. Hurricane survivable walls should be allowed to cure longer. This can cause a conflict as the forms are either rented by the day or needed at the next job.