Deck Maintenance – From HomeAdvisor Newsletter by Marcus Pickett


Decks have become an extremely popular, low-cost way to add living space to a  home. Decks make it convenient to enjoy sitting outside day or night. They open  up the home and facilitate entertaining and outdoor dining. Yet, decks are also  subject to the damaging effects of weather. As such, deck maintenance is  critical to prevent discoloration caused by dirt, moss, algae, and other plants.  These deck enemies tear apart the surface of the wood. Splinters form, creating  a rougher surface that is even more inviting to dirt and plants. Before long,  you have a dingy deck that’s treacherous when wet and riddled with splinters.

Basic Deck Maintenance

1. Inspect and Prepare the Deck As part of your deck maintenance,  you should inspect your deck every year or two. Check especially for any loose  boards or protruding nails that need repair. Clear the deck of any furniture or  toys and cover all fragile plants. Next, sweep the deck of larger debris. Before  beginning the cleaning process, make sure no children have access to the area.

2. Clean the Deck Before you can apply sealant, you must  thoroughly clean the deck of all dirt and build-up. Debris clogging the spaces  between deck boards should first be blasted out with a powerful nozzle on a  garden hose or a powerwasher. The water can also help dilute any chemicals that  may inadvertently come into contact with plants and grass. (Even with mild  solutions may contain plant-killing bleach.) Products with a base of  non-chlorine bleach base or oxalic acid are used to eliminate discoloration and  stains. Bleach-based products eliminate mildew, while acid-based materials  handle graying and stains. But, be aware that bleach used to kill mildew can  also leave a surface drab and washed-out. For these problems, an acid-based deck  restoration product should be used.

Be sure to read the cleaning solution directions and warnings thoroughly. The  solutions can usually be brushed onto the deck using a broom or it can be  sprayed on with a powerwasher under low pressure. In general, the more powerful  the chemical, the less scrubbing will be necessary. Scrubbing can be done by  hand using a basic scrub brush or a push broom. After waiting the directed  length of time for the chemicals to do their work, thoroughly rinse the deck.  High-powered jets can be helpful, but too much pressure can gouge wood or cause  the grain to become exaggerated.

3. Seal the Deck Once the area is dry, you must seal the deck. Put  down tarps to protect plants, air conditioners, and other items that need  protection from the sealant. The level of protection needed depends in part on  how you are going to apply the sealant. Sealant can be brushed on, rolled on  with a paint roller, or sprayed on. Spraying is the fastest by far, but this is  also the hardest to control. And, some sealants have color that will stain  surfaces to which they are applied.

Sealants are also rough on plants. While most plants won’t be damaged by  getting hit with wafting over-spray, direct hits can do real damage. Sealants  come in either water- or oil-based formulas. Professional sealants, which are  typically superior, are oil-based. Some sealants contain stain to tint the color  of the deck. Sealants with stain don’t always deliver a uniform color across the  wood, so try it first in an out-of-the-way spot to make sure the results match  your expectations. A good quality sealant will also contain ultraviolet sunlight  protection to reduce the damaging effects of the sun.

4. Paint or Stain the Deck

Though some people choose to paint their decks with deck paint, most take  advantage of the natural beauty of expensive decking woods by using a clear or  lightly stained finish as the final step of their deck maintenance. If you do  choose to paint, use a stain-blocking oil or alkyd primer first. In general, the  best finishes are those that soak into the wood, not those that provide a  surface film. A heavily pigmented, solid stain isn’t really recommended for  decking because it shows wear patterns and may peel. You want something that  really soaks in.

Deck  Installation Project Guide If you enjoyed this article, check out our  free Deck  Installation Guide, which features expert advice, design & material  comparisons, and custom price estimates for your remodeling project


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