These are best for new ceilings, walls, and roofs, and although they have a high R-value, they still do not have the best insulation properties in the market since they must be cut to fit into pipes and other wall penetrations, hence leaving gaps. Since they are not structural, you can barely nail anything to them, making it easy for rodents to tunnel through them. SIPs require the support of other forms of insulation to be fully effective.
Spray foam insulation, on the other hand, has the highest R-value per inch than any other insulation type (6.5). Not only that, but it forms an air barrier, which is handy in eliminating other weather threats, such as water vapor entry.
Our spray foam contains chemicals that expand to form a plastic, which completely seals all cracks and gaps, preventing any form of air leaks. The closed cell polyurethane spray foam is very useful in stopping the movement of air and moisture. They are also very long lasting compared to other insulation methods, hence you will need not to worry about constantly needing to replace them.