- How to Fix a Gap Between the Driveway & Garage
- How to Replace Wood Joints in Patio Concrete
- How to Replace Caulking in a Swimming Pool Expansion Joint
- How to Fill Large Expansion Joint in a Concrete Driveway
- How to Seal Expansion Joints in Concrete
- How to Fix an Expansion Joint in the Concrete Around an In-Ground Pool
- How to Recaulk the Pool Coping
- How to Replace the Caulking in a Swimming Pool
A gap between a driveway slab and a garage is a threat to the home’s foundation. If left unsealed, water will seep through, damaging the foundation and causing cracks when temperatures drop. Fixing this gap is not complicated. Filling the gap with an expansion joint will prevent water damage and allow concrete to expand and contract as needed to prevent cracks.
Brush out the inside of the gap with a stiff-bristle brush, removing any sticks, leaves and other debris.
Measure the depth and width of the gap with measuring tape.
Unroll a length of foam backer rod equal to the length and width of the gap. Cut the foam to fit with a sharp utility knife. The foam backer rod is strong and durable so it can withstand harsh weather conditions and the stress of daily use. The expansion joint must be at least 1/4 inch wide.
Press the foam backer rod into the gap with your hands. When you feel resistance, lay a wood board over the foam and hit the board with a rubber mallet to push the foam in all the way.
Use a caulking gun to apply the sealant over the foam backer rod until its level with the surface of the driveway and garage. Smooth it level with the driveway and garage with a trowel.
Continue to caulk around the side edges so there are no gaps remaining between surfaces of the driveway edging.
Scoop concrete vinyl patch compound with a putty knife into any gaps that are too small to fill with foam backer rod. Smooth it down with the trowel. Once it dries, use a paint brush to apply a coat of sealant over the patch.
Remove the existing rotting wooden expansion joint with tools like a pry bar, putty knife, crow bar, flat shovel, chisel and hammer. Replace all of your joints at the same time to provide a consistent finished appearance.
Clean your open joints using a garden hose with a focused sprayer. Any weeds or other debris should be removed so that the concrete joints are as clean as possible.
Cut your foam backer rod with a utility knife and insert the rods into the patio expansion joints using a putty knife to press the rods to the bottom of the joint. The rod fills up the space in the joint to keep the sealant closer to the surface of the joint.
Apply tape along both sides of the joint to create clean lines when you apply the sealer.
Fill the joint with a self-leveling expansion joint sealer. Use a caulking gun if your particular product dispenses by caulk tube. Some products may be applied with a putty knife or other method. These sealers are often elastomeric polyurethane products that remain flexible enough to allow the concrete to expand and contract easily. This product is available in many colors to match your patio finish. Allow the sealant to dry for 24 hours before removing the tape and walking on the joints.
Scrape out the old caulk in the joint carefully using a putty knife.
Wipe any moisture out of the area and let it dry for a few more hours in the sun.
Tape off the area so only the expansion joint is visible. Lay a strip of backer rod foam in the space before caulking.
Apply an elastomeric sealant caulk that’s intended for outdoor use into the expansion joint, using a caulking gun to lay a consistent bead of caulk that is 1/2 inch in diameter.
Smooth over the surface of the caulk with a rubber float.
Pull off the tape before the caulk sets. Allow it to dry for the manufacturer-recommended length of time before getting it wet.
Remove any dirt, leaves and other debris from the large joint with a hand brush. Use a wet-dry vacuum to suck out any remaining loose debris.
Cut foam backer rod to fit the length of the joint with a utility knife. The backer rod should be a little wider in diameter than the width of the joint. Lay the material over the top of the joint and push it to the bottom with a putty knife. Once in place, the top of the backer rod should be about one-quarter inch from the surface of the driveway.
Attach a tube of self-leveling urethane sealer to a caulk gun. Start at one end of the joint and fill the remaining joint with the sealer. Smooth the surface with the putty knife or a concave jointing tool. Block off the driveway so the joints can set for at least 24 hours.
Apply an even coat of concrete sealer over the driveway and expansion joints with a roller brush. The sealer repels water and stains. Wait a day full for the sealer to dry and plan to re-apply it every 2 or 3 years.
Clean the inside of the expansion joint thoroughly. Briskly brush the joint with a steel wire brush to remove any loose concrete. Sweep the length of the joint with a stiff broom, ensuring that you get the loose debris from between the two slabs. If possible, vacuum the expansion joint with a wet/dry shop vacuum.
Measure the length of the joint with a tape measure and transfer the measurement to your backer rod. A backer rod is made from flexible material that is water resistant. Cut the backer rod to the measurement with a utility knife.
Insert the backer rod into the expansion joint. Press the rod down with your fingers to ensure the rod rests in the bottom of the joint.
Open the concrete epoxy sealant and mix well with a paint stick. Pour the sealant into the expansion joint on top of the backer rod until it is 1/16-inch below the concrete surface. Smooth out the sealant with the plastic putty knife. Allow at least 30 minutes for the sealant to cure.
Wear work gloves and eye protection before beginning the repair because you must remove damaged particles that could fly up and cause injury.
Kneel down on the pool deck and clean out the damaged expansion joint by scraping it out using a slotted screwdriver. To remove material that does not detach easily, tap the head of the screwdriver with a hammer and employ a chiseling action.
Sweep the expansion joint with a broom to remove all particles from it that could interfere with the patch. Sweep the debris away from the pool so it doesn't get in the water.
Open a tub of concrete expansion joint repair and scoop up a trowel full. Place the material into the expansion joint. Continue filling the expansion joint with patching material until filling the entire gap and it mounds up by half an inch.
Turn a 2-by-4 inch board on its side and place it on top of the patch material in the location of the expansion joint. Hit the top of the board firmly with a hammer to pack the material tightly into the joint.
Remove old caulking from between the pool coping tiles. Be careful not to damage the tiles as you scrape out the old caulking with a knife. Use a stiff brush to finish removing all the debris between each one of the tiles.
Scrub the surface of the tiles with a few drops of dish detergent mixed with water. Rinse well. If old caulking still remains, or if any foreign matter is adhering to the tiles, remove it with a single-edge razor blade. Re-rinse to remove the debris. Allow the tiles to dry.
Insert backer rod into the joints. This acts as a cushion and you don't need to use as much caulk.
Apply masking tape along the edges of each tile on the pool coping. Caulk each joint with pool caulking material. Some products allow you to apply them with a caulk gun, while others require you to apply them with a spatula. Smooth the caulking in place. Allow it to skim over for at least 48 hours before removing the masking tape. Caulking typically takes three to seven days to completely dry.
Use the utility knife to scrape off the old pool caulking. Run the blade along both edges of the joint. Remove the underlayment beneath the old caulking and use a wire brush to get rid of any remaining caulk. This helps the new caulking adhere to the walls of the joint.
Use the wire brush to remove dust and debris from the area. You can also use a vacuum cleaner with a hose attachment to clean the area.
Insert a backer rod foam into the joint evenly until its top is about a half inch below the surface of the joint. This backer rod foam, which provides a surface for the caulking to adhere to, is available at pool supply stores.
Use a caulking gun to apply caulk to the joint until it is at the same level as the surface of the pool deck and the coping. Use an elastomeric sealant caulk labeled for outdoor use. As you apply the caulking, keep checking the area you just worked on for any bubbles and use a toothpick to burst them. Elastomeric sealant caulk is available at home improvement centers.
Sprinkle fine crystal sand over the surface of the caulking to increase its durability before it dries.