Once you’ve built or had your new deck built, you’ll definitely want to preserve this significant investment. Even if your deck is mostly composite, it likely has wood support and maybe even railing posts. Most people are eager to quickly get a coat of preservative on their newly built deck, screened porch or pergola. It’s much better to wait a little while to get a sealant’s maximum protection.
If you have treated wood, most manufacturers recommend waiting at least a year before applying any type of sealant. CCA, ACQ, and MCQ are saturated with their own pest repellants and wood preservatives. Any additional chemicals won’t harm, they just won’t penetrate the wood until it dries out. From experience, I’d recommend waiting 2 full summers and then applying in the fall to get a good application.
Cedar also needs some time to weather but not nearly as long. Smooth sawn cedar has a “mill glaze” or cauterization from being cut by high speed mill saws. It generally takes six to eight weeks for the glaze to wear off and the grain to open up. Cedar also has natural oils that bleed out the first couple of months of exposure. Therefore, rough sawn or smooth sawn cedar should both be given two months exposure before staining or sealing.
There are many different brands of stains and sealants. There is also a huge difference in the performance of a quality stain and a poor one. Listed below are the stains and sealants we feel are the best:
· Penofin (http://www.penofin.com/)
-Available at any Sutherlands (http://www.sutherlands.com/locator.php)
or Kansas City Deck Supply (http://www.kcdecksupply.com/)
· Sikkens (http://www.sikkens.com/)
-Available at any Zeke’s Paint and Design Center or many other paint and hardware stores across the country. (http://www.nam.sikkens.com/find-a-dealer.cfm)
· SuperDeck (http://www.superdeck.com/)
-Available at Kwal Paint locations (http://www.kwalpaint.com/locations.html)
If you want to keep wood looking its natural color, choose a stain that has UV protection along with water repellant. The sun’s ultraviolet rays are what turn wood gray and drab. I’d suggest a semi-transparent natural tone oil based product. It’ll keep the wood’s natural tone and enrich the grain’s colors. Basically, give the wood a wet look. Oil based sealants seem to stand up much better to Mother Nature than water based products.
Before staining, you’ll want to power wash the wood thoroughly. Be careful no to get the spray nozzle too close to the wood. Power washers are great for removing sediment deep in the wood but can easily splinter and rip wood apart if the pressure is too great. Read the manufacturers directions on the back of the product. Generally, it’s a good idea to wait at least forty-eight hours after power washing for the wood to let it dry out. Make sure there’s no chance of rain for at least forty-eight hours after you apply the stain. Only stain when the temperature is above fifty-five to sixty degrees during and after application for at least forty-eight hours (this includes overnight). This ensures proper curing so the stain doesn’t run or puddle from air moisture.
Prep and cover the surrounding areas thoroughly since deck stains are very messy. Make sure you move anything below the deck and cover patios or unmovable objects because the stain will most likely drip down between the deck boards. You can brush, roll or spray depending on the deck’s location and your experience level. Keep a brush handy. You may need to back brush areas that puddle or drip. If spraying, make sure there is very little or no wind. Stains can be carried far, even in a small breeze. Keep some extra rags and paint thinner (for oil based stains) or water (for water based stains). Wipe any areas which get stain that shouldn’t have. Apply a minimum of two coats to all flat surfaces (decking, stair treads, and tops of handrails). Most manufacturers suggest applying again the following year to get a good base coat. Then you can plan on repeating the process about every two to four years depending on you local climate.
It may seem like a lot of work, but so is building a new deck. A properly maintained deck, screened porch, pergola or arbor can last about as long as it’s taken care of. If you’re thinking of hiring someone to do the work for you, check with your local paint store. They can probably recommend a good painter or deck stain specialist. If you used a deck builder, they may also stain or know a reputable company which does.
Hope this helps,
Dan Milford (DW Elite Decks - Kansas City deck builder)