Should I seal my deck after power washing
Rachel Hunter
Published Mar 24, 2026
After completing the deck power washing, wait 24 to 36 hours before applying sealer. If the weather is cool or humid, wait 48 to 72 hours. The deck must be thoroughly dry to ensure deep penetration of the sealer.
Do you have to reseal your deck after pressure washing?
If your deck is in a great condition and you’re simply pressure washing it to remove dirt, dust or mold build up then there’s no need to seal your deck after pressure washing. … As long as you don’t use too much pressure, washing won’t cause any damage to the surface of your deck.
Should I power wash my deck before sealing?
Before sealing your wooden deck, you’ll want to clean it. Power washing your deck is an efficient way to clean and prep your deck for staining, but it’s also easy to damage the wood.
What do you put on a deck after pressure washing?
Applying Sealer Your deck needs at least two full days to dry after you wash it and before you seal it. While you can always apply sealer with a paintbrush, it’s faster and easier on your knees to use a roller or a sprayer.How long should a deck dry after power washing before staining?
After a deck has been power washed it will have some retained moisture within the wood. It’s important to let the wood dry thoroughly so none of the water that soaked into the wood gets trapped under the stain. In perfect drying conditions, 48 hours is enough for the wood to get to where it needs to be before staining.
Should you seal a deck?
When Should I Reseal My Deck? You should reapply wood sealer at least every three years. In many cases, you need to seal a wood deck once a year. The more foot traffic and sun exposure your deck gets, the more often you need to apply deck sealant.
Should I stain or seal my deck?
Sealing a deck is best for cedar, teak, mahogany, or other quality woods as it enhances the wood grain and natural color. … Staining a deck protects the wood from mold, mildew, moisture, and rot, and UV rays and sun damage. The stain is available in transparent, semi-transparent, semi-opaque, and solid colors.
How long should deck dry before sealing?
Allow the deck to dry for at least two days before applying a sealer.Can you ruin a deck by pressure washing?
The impact of washing your decks under high pressure is profound in softer materials such as PVC. The pressure washer can significantly engrave the PVC on the deck if you use unreasonably high pressures during a routine washing exercise. Washing a composite deck under high pressure can also lead to extreme damages.
What if it rains after I power wash my deck?Rain really will not hurt unless the deck is wet when you seal it. If wet when sealed depending on the type of sealer it may be ok (water based) or with oil based it will not adhere as well.
Article first time published onIs it OK to pressure wash pressure treated wood?
Should You Pressure-Wash It? Yes. Decks made from South American hardwoods such as Ipe, Camaru, and Tigerwood will hold up to the power just fine. Decks made of pressure-treated wood are generally okay, too, assuming you don’t hold the nozzle too close.
How often should a deck be power washed?
Most home maintenance contractors recommend power washing your deck once a year. An annual wash will keep your deck in optimal condition, cutting down on accumulation of dirt, mildew, or algae growth.
Can you pressure wash and stain a deck in the same day?
DPI Pressure Washing recommends you wait 72 hours following cleaning to stain your deck. If it rains on one of the days afterwards, you’ll have to wait again, but it will be worth it.
Should I power wash deck before staining?
There is a common misconception that just pressure washing a deck prior to staining is all you need to do in order to prep your deck for stain. Pressure washing can help, but if you want your stain to last, using a good deck cleaner and brightener on the deck prior to pressure washing will provide you the best result.
How many dry days do you need to stain a deck?
You will want to set aside a minimum of two days, including drying time. If your deck needs to be power washed, or if the boards on the deck need replacing, you may want to set aside another extra couple of days. Be sure to have all of your supplies ready well ahead of time.
What is the longest lasting deck sealer?
Q: What is the longest-lasting deck sealer? An oil-based deck sealer, such as Rust-Oleum Ultimate Spar Urethane, will protect a deck for up to 5 years.
Do I need to seal the underside of my deck?
The underside of decks, by its very nature, never sees direct sunlight, so stain under a deck is not necessary. … Having said that, no sun can cause mold and mildew to build up on the underside of decks.
What is a good deck sealer?
- Thompsons Waterseal Advanced Natural Wood Protector.
- ECO-SAFE Wood Treatment – Stain & Preservation by Tall Earth.
- Rust-Oleum Coppercoat Wood Preservative.
- CabotStain Australian Timber Oil Penetrating Oil.
- Thompsons Waterseal – Transparent Stain.
How soon can you seal pressure-treated wood?
A newly built deck that uses pressurized wood will need time to dry completely before a sealer can be applied. The chemicals used to treat the wood leave moisture behind, and depending on the climate, it can take anywhere from a few weeks to a few months until it’s dry enough to seal.
How often should you seal a pressure-treated deck?
A: Some owners of pressure-treated structures assume the wood needs no protective treatment, and this view at one time was encouraged by manufacturers of the wood. However, most pressure-treated wood should have periodic sealing against moisture, preferably every year or so.
How much does it cost to seal a deck?
Cost to Seal a Deck Sealing a deck costs $895 or typically between $551 and $1,277. You’ll pay $0.75 to $4 per square foot for both materials and labor. Labor alone makes up 50% to 75% of the total price. Cost factors include regional worker rates, complexity, size, prep needs and accessibility.
How do you seal wood after pressure washing?
After completing the deck power washing, wait 24 to 36 hours before applying sealer. If the weather is cool or humid, wait 48 to 72 hours. The deck must be thoroughly dry to ensure deep penetration of the sealer.
Why you should not pressure wash your deck?
Ideally, power washing a wood deck will not ruin the wood and etch or erode the softwood fibers. However, when wood gets wet, the fibers may become raised, creating a rough surface. This is a particular problem on handrails, where the raised fibers can lead to splinters. Make sure the wood is dry before sanding.
Is it OK to waterblast a deck?
Be careful. And PLEASE, do not waterblast your deck, no matter what the manufacturers of overpriced cleaning gadgets tell you. Powerful jets of water can damage your decking timber, lifting timber fibres.
Can you power wash a wet deck?
Once wet, you can apply a cleaning solution that is designed for pressure washers and wooden surfaces using a low-pressure soap nozzle. … Once you have cleaned all of the spots and stains from the deck, rinse with clear water on a medium- to high-pressure setting. You should always spray with the grain of the wood.
Does ready SEAL need 2 coats?
Ready Seal is intended to be a two-coat application, and the representation of tones above and on the Ready Seal website is indicative of two coats of Ready Seal.
How many coats of stain should you put on a deck?
The general rule of thumb is to apply only as much deck stain as the wood can absorb. Typically this will be 2 coats, unless your dealing with extremely dense hardwoods which may only be able to absorb 1 coat of wood stain.
Can you seal an old deck?
Depending on the desired look, you can spruce up a worn-out deck with a new stain or paint-based protective seal. … You also need a clear weather forecast, as a paint-based sealant coating requires 48 hours to dry before being exposed to rain or extreme humidity.
Do you seal a deck after staining?
Most of the time, stains also contain a protective sealant. It’s a good idea, though, to re-seal your deck (or check that it needs to be re-sealed) once a year. Water-based stains can adhere to water or oil-based coatings already present on the wooden surface.
How do I waterproof my deck?
The best way to waterproof under your deck is with a deck drainage system installed during construction. A drainage system diverts water away from the joists and beams. An over-the-joist deck drainage system such as Trex RainEscape provides 100% protection from the damage caused by wood repeatedly getting wet.
Can I seal my deck after it rains?
Wait 24 to 48 Hours According to stain manufacturer Behr Corporation, you should avoid staining a deck for at least 24 to 48 hours after the deck gets wet. Otherwise, moisture in the wood will prevent the stain from adhering correctly to the deck.