Tub-Wall Seal Leaks

Problem: Grout or seal around top tub edges deteriorates, allowing water to leak through the joint.

Background: The crack between the bathtub and wall should always be tightly sealed, because moisture can damage the walls, the ceilings below the bathroom, and the house frame. Besides waterproof grout, several types of sealer are available, including press-in-place caulk, and latex caulking compounds. Hard ware stores and home centers will have a variety of products to choose from.

 

What to do: The first step is to scrape away the old grout or sealer from the joint areas using the pointed end of an old-type can opener or another available tool. Wash the surface to remove soap, grease, and dirt, then dry before applying new material. If using waterproof grout, slowly add water and mix until a thick paste forms, then press the mixture into the crack with a putty knife. Wipe off excess grout before it dries, and let it dry thoroughly before using the tub. If using newer products, such as latex caulking compound, fill the area at a 45° bevel and smoothen it with a small tool such as an old spoon, putty knife, or spatula.

Special advice: Double-check the instructions on a product’s label be fore you buy it. Sealers that come in a tube can be squeezed in a ribbon along the crack. Because some products dry quickly, be prepared to work quite fast if you want to end up with a neat-looking job. If you are using grout, discard any leftover mixture (do not put it down the drain) and wash any containers or tools before the grout dries on them.

Helpful hint: One way to do a neater job is to line the edges of the crack to be filled with masking tape, and then remove it after the job is completed. However, pre-packaged, press-in-place caulk ribbons are easy to install and are worth the extra money if you want professional- looking results.