How do you weatherproof a wood deck
Rachel Hunter
Published Apr 05, 2026
Apply a thin, even coat of high-quality, mold- and mildew-resistant, waterproof sealant with UV protection, such as Woodsman® Water Repellent or Woodsman® Wood-Toned UV Wood Sealer and Protector, using a stain brush, in the direction of the boards.
How do you weather proof a wood deck?
Apply a thin, even coat of high-quality, mold- and mildew-resistant, waterproof sealant with UV protection, such as Woodsman® Water Repellent or Woodsman® Wood-Toned UV Wood Sealer and Protector, using a stain brush, in the direction of the boards.
How do you prepare a deck for waterproofing?
- Cleaning and Clearing Space on Your Deck. …
- Smoothing Out Rough Areas of the Deck Surface. …
- The Coating Application. …
- Letting the Coating Dry Before Bringing Furniture Back.
Is it better to stain or seal a 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.Does decking need waterproofing?
Taking proper care of your wood deck is extremely important. Because decks have direct contact with the outdoor elements, wood decks need to be properly sealed and waterproofed. If you haven’t sealed and waterproofed your deck, we highly recommend you invest.
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.
What is the best sealant for wood decks?
- 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 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.How long do you wait to waterproof a deck?
DO wait 30 days before sealing a new deck. If it beads up, the wood is still too wet to seal, but if the water is absorbed, it’s ready to seal. Be sure to apply sealant as soon as the wood is ready; leaving the deck exposed any longer increases the likelihood of both ultraviolet (UV) and moisture damage.
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.
Article first time published onHow do you apply water seal to a deck?
- Pour the sealer into a deck.
- Dip the paint pad into the seal.
- Bring the seal onto the tray area.
- Start at one corner and work from one end to another.
- Apply the sealer parallel to the deck boards.
- Now allow the deck to thoroughly dry. Thompson water seal dry time takes about 24 hours to dry thoroughly.
Can you water seal old wood?
Waterproofing can prolong the life of an old wood deck. For painted or varnished decks, you can improve moisture resistance by applying a new coat of paint or varnish. … After the deck is dry, one or more coats of waterproofing are applied.
Can you apply Thompson's Water Seal to wet wood?
Thompson’s® WaterSeal® Waterproofing Stains can be applied to damp wood, so you only have to wait about two hours to begin applying stain. Some of our other products require that the wood dry for 48 hours before applying a deck coating.
How do you waterproof an outdoor 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.
Why do you waterproof a deck?
Deck waterproofing is especially important for any homeowner with a roofdeck over a living space. It’s far more expensive to replace or repair a leaky roof deck (and the interior of a room under a leaky deck) than it is to waterproof your deck properly in the first place.
Is Thompson's Water Seal any good?
Overall Score Thompson’s® WaterSeal® at 2 Year Period: 6.125 – Overall Thompson’s® WaterSeal® Clear Plus wood finish is a “clear” disappointment. Any finish that offers zero ability to prevent UV graying should not be considered for your deck or exterior wood.
Is Thompson Water Seal good for decks?
Thompson’s WaterSeal Waterproofing Wood Protector is a super-durable clear wood sealer. It prevents water damage while maintaining the natural color of the wood. It’s our top choice for decks, fences, and outdoor furniture that has a natural wood finish.
How do I stop my deck from peeling?
Poor Maintenance and Lack of Sealer The easiest and most effective way to prevent your deck stain from peeling is to go over your deck with a proper sealant. Deck sealers essentially waterproof your deck, keeping moisture from contacting the surface directly.
How long does Thompson's Water Seal last on a deck?
How long will Water Seal last? If applied correctly, Water Seal will last up to 4 years.
Should I seal pressure treated wood?
Although the wood is resistant to rot and insect attacks because of the pressure treatment, it can warp, split and develop mildew if not protected from the effects of water. …
What time of year should I seal my deck?
The general rule of thumb is that, if a deck is installed after August, you wait to seal it until the spring. You’ll know when your deck is completely dry because it will actually change in color from a greenish hue to one that is closer to beige, and the boards will have more space between them.
What is the best way to waterproof wood?
- Use linseed or Tung oil to create a beautiful and protective hand-rubbed finish.
- Seal the wood with coating of polyurethane, varnish, or lacquer.
- Finish and waterproof wood simultaneously with a stain-sealant combo.
Do you need to seal cedar deck?
Sealing your deck will keep it safe from water damage, rot, and insects. Stain, on the other hand, enhances the deck’s beauty while offering UV protection. Every two to three years, you will want to reseal and stain your cedar deck.
Can you apply deck stain with a roller?
You should use a roller brush or sprayer to apply a steady coat of quality stain, such as Olympic Elite stains or Olympic MAXIMUM stains. … PRO TIP: Back brushing your stain will help the stain soak into your deck boards, allowing better, long-lasting results.
How do I know if my deck needs a second coat of stain?
You can tell whether your deck stain is still protecting the wood if it repels water. If it doesn’t, it’s time to stain again. Consumer Reports tests dozens of solid, semitransparent, and clear stains to find out which last longest.
How long should you wait to put on a second coat of stain on a deck?
If a second coat is required, wait 4 hours between applications. Depending on temperature and humidity, allow 24 – 48 hours of dry time before using your beautifully restored deck or porch.
How much does 1 gallon of deck sealer cover?
Deck stains provide 200 to 300 square feet of coverage per gallon. You’ll need 2 gallons of stain to cover a 500 square foot deck. Coverage depends on the stain brand, type, and the wood’s age, condition, and porosity.
How much does a gallon of Thompson's Water Seal cover?
MaterialApproximate Coverage (sq. ft./gal.)Wood: Rough Sawn100Wood: Smooth Finish200Plywood150Wood Shingles100
How often should you seal your deck?
Applying a sealer and/or stain typically is recommended every one to three years, depending on the finishing product, deck use, weather conditions, and sun exposure.
Can you roll on Thompson's Water Seal?
Q: What is the best way to apply Thompson’s® WaterSeal® cleaners? The fastest way to apply is with a pump-up sprayer (using a coarse setting), but you can also apply with a brush or a roller. You should apply liberally.
Can you spray Thompsons Water Seal?
Can you spray thompson’s water seal? Yes, you can apply your Thompson’s water seal using a standard pump garden sprayer and achieve the desired results. This sprayer is best to use when applying sealers.