Can I attach my deck to a hollow block concrete foundation?
Yes, there are products available for anchoring a ledger board to hollow concrete block foundations (concrete masonry unit, CMU). There are a handful of manufacturers that produce epoxy and other adhesive anchors that are tested for use in hollow CMU. These adhesive fasteners must be installed in strict compliance with the manufacturer’s installation instructions. Generally, these fasteners will provide much lower-load resistance than those connecting to solid concrete. Be careful to install a sufficient amount of fasteners based on the loads generated by the deck design. The fasteners must be approved for a wet-use, exterior environment and must provide appropriate corrosion protection.
Most builders prefer to build a freestanding deck rather than attach to a hollow concrete block house foundation wall.
Attaching the Ledger Board to the House Rim
Learn how to properly install a waterproof ledger board using flashing and fasteners. Check out our step-by-step video and detail drawings.
Lateral Load Device
Learn about your options for providing lateral load support for your deck. We explain recent code changes affecting deck building.
Ledger Board Fasteners
Compare lag bolts, carriage bolts and structural screws as deck ledger board fasteners. Take a look at our ledger board fastener spacing chart.
Pressure Washer Buying Guide
When it comes to cleaning your deck, it's important to choose the right pressure washer. Use this pressure washer buying guide from Decks.com to help with your decision!
How to Remove Paint from a Wood Deck
Aiming to refresh your deck with new paint or sealer? Learn the easiest and fastest methods of stripping paint from your wood deck with Decks.com.
How to Stain a Wood Deck
Staining your deck, porch or patio can help maintain the longevity of its appearance. Learn how to stain your deck with these easy to follow steps at Decks.com.
More Helpful Resources
Explore Articles by Topic
Footings
Information related to installing frost footings for decks
Framing
Learn structural framing methods
Decking
Learn about wood and composite decking materials
Stairs
An in-depth look at the complex issue of how to build stairs
Railings
How to install guardrails and handrails to meet IRC code
Features
An overview on water drainage, benches, planters and lights
Design
The basics of deck design
Planning
Learn about permits and working with contractors
Porches & Patios
Build a covered deck to enjoy all seasons
Ledger
Proper attachment techniques
Care
Maintain your deck to maintain your investment
Materials
An overview on water drainage, benches, planters and lights
what if my deck has no flashing
Our inspector discusses what you should do if you deck ledger board isn't properly flashed.
Ledger Board Fasteners
Compare lag bolts, carriage bolts and structural screws as deck ledger board fasteners. Take a look at our ledger board fastener spacing chart.
Installing A Ledger Board Around A Corner
Follow our tips to properly install a deck ledger board around the corner of a house to keep water out.
How to Remove Scuffs and Scratches from Composite Decking
Removing scuffs and scratches can help make your composite deck look like new. Learn how to fix and prevent your composite deck from future scratches.
Deck Maintenance Checklist
Wondering how to best care for your deck? Download our comprehensive deck maintenance checklist to ensure your deck is safe and lasts for years at Decks.com.
Can You Paint or Stain Composite Decking?
Most composites don’t require painting or staining. However, if you are considering staining or painting your deck, you can learn how to do so and what you’ll need at Decks.com.
Explore Articles by Topic
Footings
Information related to installing frost footings for decks
Framing
Learn structural framing methods
Decking
Learn about wood and composite decking materials
Stairs
An in-depth look at the complex issue of how to build stairs
Railings
How to install guardrails and handrails to meet IRC code
Features
An overview on water drainage, benches, planters and lights
Design
The basics of deck design
Planning
Learn about permits and working with contractors
Porches & Patios
Build a covered deck to enjoy all seasons
Ledger
Proper attachment techniques
Care
Maintain your deck to maintain your investment
Materials
An overview on water drainage, benches, planters and lights