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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.


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Step-by-step instructions on how to install a ledger board to a concrete house foundation wall using expansion anchors.

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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!

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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.

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How to Pressure Wash a Deck

Pressure washing your deck is the best way to keep your investment looking like new. Learn how to properly clean your wood deck with these tips from Decks.com.

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Explore Articles by Topic

Create a free account and get instant & exclusive access to all that Decks.com has to offer:

Checkmark 1,000+ How-To articles
Checkmark 80+ Free Deck Plans
Checkmark Deck Planning Calculators
Checkmark Free & Simple Deck Design Tool
Deck Ledger Board

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.


Popular Ledger Articles
Deck Ledger Board

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.

Deck Ledger Board

what if my deck has no flashing

Our inspector discusses what you should do if you deck ledger board isn't properly flashed.

Deck Ledger Board

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.

Next Step: Care Articles
Deck Cleaning

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!

Repairs

How to Replace Deck Boards & Repair Your Deck

Deck boards can split, rot or come loose over time, but it’s easy to remove and replace deck boards without rebuilding the whole deck. Learn how from the experts at Deck.com.

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Average Cost to Stain a Deck

Find the national average costs for staining and sealing a deck per square foot, including sanding and power washing prices. Learn more at Decks.com

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