The purpose of insulation is to provide a continuous thermal barrier to minimize heat flow through the walls, floor and ceiling. Insulation serves the purpose of keeping a home comfortable and reducing energy costs.
Rigid insulation – These are the stiff ultra-light Styrofoam panels that you have seen occasionally blowing around job sites. There are a lot of different types of materials that comprise the family of rigid insulations, and may warrant their own blog.
For the purpose of this post, you can get r-4 per inch using EPS or Phenolic panels and up to R-7.5 for the Polyurethane rigid panels.
The materials in these panels are reasonably inexpensive, but the labor to install becomes very difficult to justify for cavity wall or roof insulation.
If you are looking for ‘roofing gent visit http://aj-daktimmerwerken.be/dakrenovatie/'(also known as ‘Visita de techado http://aj-daktimmerwerken.be/dakrenovatie/‘ in Dutch language) for your roof insulation to make your home warm in winter and cool in summer.
More often than not, these materials are used in EIFS stucco systems, or really any siding system where the insulation can be installed continuously outside the structure without interruption, and also in roof deck applications where the entire roof is clad in the continuous rigid panel above the structural deck.
Spray-in foam- This method, while the most expensive, is by far the tightest solution for a cavity wall construction. The material is Polyisocyanurate and can have an R-value averaging about 7 per inch.
They spray it into the cavities and it expands to seal every nook and cranny. It hardens into a plastic material that is not only stable, but is also essentially inert and won’t react with other building materials. Like other rigid solutions, it can get wet and it won’t lose R-value.