The inevitable is bound to happen: Your beautiful new deck will age. But you can determine how gracefully it ages.
“It’s not maintenance-free to put wood outside,” says deck designer John Breiling. “When you spend $10 to $12 per square foot of deck, you want to care for your wood. It can be tough when you live in a climate that goes from soaking wet to dry in a short amount of time, but caring for your deck is a true investment in what you’ve already spent.”
Whether your deck is already old or was just installed, these pointers will help extend its life.
You may think of a deck as self-cleaning, but in reality, it needs to be cleaned as much as your kitchen floor.
Throughout the year, keep an eye on your deck. Brush off fallen leaves for better air circulation and so leaves won’t rot and leave mildew. If your deck surface is near the ground and air circulation is limited, cover the soil with a polyethylene barrier topped with decorative rock to prevent moisture damage underneath.
Clean between decking board cracks and use pot feet to keep potted plants elevated. Schedule a major deck cleaning in the fall and the spring. At these times, you should inspect for damage, clean off debris with a hose, sand splinters and use a stain remover to lift any grill or dirt stains.
One of the biggest mistakes people make when attempting to renovate a deck is failing to properly prepare the deck surface before applying stain. Always remove existing deck coatings and start with a fresh surface. A good stiff brush and a deck wash removes stains and washes away dead fibers without hindering the ability of your deck to soak up a new stain. Or use a pressure washer. However, you may want to hire a professional for this, so you don’t accidentally strip the soft grain of the wood.
If any areas of the deck have started to splinter or crack, sand them down until a new layer of wood shows through. And read the stain manufacturer’s directions, so you prepare the deck surface effectively.
If you’ve just finished cleaning your deck, wait two or three days before you apply a stain. Give a new deck made from pressure-treated lumber several days to acclimate before you stain. Even if you touch the wood and it feels dry to you, don’t trust your instincts. If you use a stain when the deck is still wet, the oil won’t penetrate the wood and the stain will sit on the surface, instead of seeping in. When you do eventually stain the deck, cover as much of the wood as you can, including the ends.
Reading labels carefully may sound like a no-brainer, but people often buy a product without understanding how it will perform. For example, if you buy a clear stain, your deck’s natural beauty will shine through, but you’ll have to re-stain every 12 to 18 months. If you use a semitransparent or tinted stain, you should only have to re-stain every three or four years. Stains with pigment in the oil are more resistant to UV damage. Think of a pigmented stain as having a sun protection factor (SPF) of 30, and a clear stain as having an SPF of 9.
You can use exterior paint on your deck boards, but it isn’t recommended. Paint sits on top of the wood and never penetrates, so it only provides a thin layer of protection that breaks up under heavy foot traffic. If you want to use paint, apply it only to balustrades or railings. As always, clean the surface to remove any dust or mildew before you apply the paint.
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