Basement or crawl space rim joists are a major source of energy loss in a house, so it's well worth the effort to add insulation and seal any cracks and gaps. A good DIY approach is to cut rigid foam insulation to fit between the joists. Cut it about 1/2 in. undersized so it's easy to fit in. Shim the rigid foam in place with little chunks of foam. Then fill the space around it with expanding foam. Don't forget to caulk or foam the joint between the sill plate and the foundation too
17 Ways to Master Expanding Foam Insulation - Now’s the time to work on insulating your home before the temperatures dip down too low. Insulating gaps now is one of the best ways to ensure you’re not letting heat out or cold air in this winter. Your furnace will thank you and so will your wallet when the heating bill comes!
Cut Cured Foam With a Bread Knife - A serrated knife with a flexible blade is perfect for cutting off excess foam. Just make sure the foam is completely cured and firm all the way through or it'll stick to the blade.
Despite the obvious drawbacks—it’s messy, sticky and impossible to remove once it cures—there’s nothing better than expanding foam for sealing energy-wasting air leaks. These are our best ways to use foam on energy-saving projects, plus tips for getting the most out of a can, and some other ingenious uses for this versatile product.
DIY for making of antlers by Jolien-Rosanne. Starting with a base of iron wire covered in foam. Then carved the foam into shape covered it with light weight clay (L'Artista clay). After sanding fine tuning I covered the entire thing in worbla to give it strength. Weighs a fraction of real antlers.
Big Holes Need a Double Dose - Some holes are so big that the foam starts to sag. For large holes like this, the trick is to fill the perimeter, let the foam cure and carve it off. Then add another layer to finish the job.