Steps for Sealing an Outdoor Concrete Patio

Alliance does a great job of presenting relevant topics on their blog for hardscape contractors. Their posts are full of important information and helpful tips for the work you're doing everyday. Check out a featured post below. 

Steps for Sealing an Outdoor Concrete Patio

Sealing your paver patio will help protect against normal wear and tear, provide a level of stain resistance, and also help protect your pavers from damaging UV rays. Sealing your concrete pavers can also enhance color or improve aesthetics, depending on the look you desire. While sealing pavers is a fairly easy job, be sure to review these important steps before getting started.

Prep. As with most home improvement projects, proper preparation will be your key to success. So before sealing, be sure to read our blog post, 4 Things To Do Before Sealing Your Pavers

Gather your supplies. The next task on your to-do list: make sure you have all of the necessary supplies and equipment for the job. Here’s a short list of what you’ll need to seal your pavers:

Safety Glasses
Mask
Gloves
Work Boots
Waterproof Overalls
HVLP Sprayer (i.e. Chapin Xtreme with 1.0GPM brass nozzle)
Roller (i.e. Gator Grey for solvent-based or Gator Yellow for water-based)
Roller Handle
Metal Paint Tray

(Important Note: You should have a dry surface before sealing pavers, although water-based sealers can be applied to pavers that are slightly damp. Make sure you carefully follow the directions for applying efflorescence cleaner and allow your pavers to dry for 24-48 hours before applying the sealer. Also make sure there is no rain expected within 24 hours following your sealer application and the temperatures are within the recommended limits.) 

Apply the sealer. Using the sprayer, apply a coating of sealer and then even it out using a roller. Make sure there is no puddling or buildup of sealer. One coat is all it takes! Over application of the sealer often results in unattractive milky-white spots on the surface. To put things in perspective, one gallon of sealer should cover approximately 175 square feet of concrete pavers. However, results may vary based on the pavers age, density, and water absorption characteristics.

Dry. Allow your patio to dry for a full 24 hours before using it. 

Follow these basic steps and you’ll master the technique of paver sealing!

Contractor How-To: Patio Overlay on Concrete Slab

Get the details of exactly what you should do before starting a patio overlay on a concrete slab. We are using ICPI's technical guides for this topic. 

How-to: Patio Overlay on Concrete Slab

This is an except from ICPI's full technical guide. To read the entire document for full details, click here to download the guide. 

1. Select your bedding and joint sand.

- Washed, clean, ASTM C 33, washed concrete sand, non-plastic, free from debris, symmetrically shaped, natural or manufactured from crushed rock.

- Do not use limestone screenings, stone dust, or mason sand C 144 for the bedding sand.

2. Prep your site.

- Base needs to be clean and dry.

- Verify that base is ready to support sand, edge restraints, pavers and imposed loads.

3. Install your edge restraints.

- Install edge restraints per the drawings and manufacturer’s recommendations.

4. Installation of the pavers.

- Spread bedding sand evenly over the base and screed to a nominal 1 in. thickness. Spread bedding sand evenly over the base course and screed rails, using the rails to produce a nominal 1 in. thickness, allowing for specified variation in the base surface.

Note: When initially placed on the bedding sand, manually installed pavers often touch each other, or their spacer bars if present.

- Lay pavers in pattern(s) shown on drawings. Place units hand tight without using hammers. Make horizontal adjustments to placement of laid pavers with rubber hammers as required.

- Fill gaps at the edges of the paved area with cut pavers or edge units.

- Cut pavers to be placed along the edge with a double blade paver splitter or masonry saw.

- Keep skid steer and forklift equipment off newly laid pavers that have not received initial compaction and joint sand.

5. Compact and sand your project.

- Use a low-amplitude plate compactor capable of at least minimum of 4,000 lbf  at a frequency of 75 to 100 Hz to vibrate the pavers into the sand. Remove any cracked or damaged pavers and replace with new units.

- Simultaneously spread, sweep and compact dry joint sand into joints continuously until full. This will require at least 4 to 6 passes with a plate compactor. Do not compact within 6 ft  of unrestrained edges of paving units.

- All work within 6 ft.  of the laying face must shall be left fully compacted with sand-filled joints at the end of each day or compacted upon acceptance of the work. Cover the laying face or any incomplete areas with plastic sheets overnight if not closed with cut and compacted pavers with joint sand to prevent exposed bedding sand from becoming saturated from rainfall.

- Allow excess joint sand to remain on surface to protect pavers from damage from other trades. Remove excess sand when done.

Need additional guidance for your next project? Just getting started in installing pavers?

Contact Jay, Andy or Mario from our Stone Team at 757-484-4421 or at stone@lancasterfarms.com. We are always here to help you!