Expanding foam comes in handy for lots of things, but knowing which foam to choose can make the project go smoother.

• Keep in mind that expanding foam expands, sometimes up to three times its original size. Excess foam can be trimmed away with a carton knife and sanded to a smooth surface. Always wear gloves when using spray foam. Wash away over-spray immediately with acetone. Do not use water on spray foam. Foam will set up in less than 30 minutes and can be painted, caulked or plastered over once it is tack-free.

• The original expanding foam fills gaps up to 3 inches wide. It is weather-resistant and bonds to most surfaces, inside and out. It is not UV-resistant, so it will need to be painted when exposed to the elements. Original expanding foam is great for filling large gaps.

• Minimal expanding foam fills gaps up to 1 inch wide. Like the original foam, it is weather-resistant and bonds to most surfaces inside and out. It is not UV-resistant, so it will need to be painted when exposed to the elements. Original expanding foam is great for smaller gaps and for spraying in situations where excess foam is not desirable.

• Both original and minimal expanding foam create enough pressure when they expand that they can move objects. Choose spray foam made specifically for doors and windows to fill gaps around framing. Window and door sealant is guaranteed not to warp frames or jambs. It fills and seals better than fiberglass insulation and creates a moisture resistant barrier.

• Use pest-blocking expanding foam to seal areas where rodents and insects are a problem. Pest block seals out pests from cracks and crevices around pipes, wires and other entry points. Pest block does not contain pesticides and is completely safe for use around the home. Its specific properties are a deterrent to chewing and burrowing pests. It reduces the need to use pesticides and seals gaps up to 1 inch in diameter.

• Use landscape-rated expanding foam for exterior water features and patio areas. Landscape foam is waterproof and UV-resistant. It will hold up to the elements and is perfect for use where water will be present. It is safe for aquatic plants and animals.

— Have a home improvement question for Fix-It Chick? Email it to Linda Cottin at hardware@sunflower.com.