![]() ![]() A general rule is any deck that is less than 24″ (600mm) in Canada or 30″ (760mm) in the States. ![]() Deck Blocks are a Good for Ground Level Decksĭeck blocks are never good for elevated decks, but for a ground-level deck, they may work. But I will get to that at the end after we discuss when deck blocks are a good idea and when not. You still want a good deck, not just an easy deck. With the deck block resting on the ground, away from the tree roots.Ĭare must still be used in adequately installing the deck blocks. Removing the concern about cutting critical tree roots killing the tree. Deck blocks can be installed without disturbing the tree roots. īut using deck blocks instead of footings simplifies all this. I have an entire article about deck construction requirements over tree roots. But a deck around a tree has some complications, especially with roots. A deck around a tree is an excellent way to enjoy the tree’s shades. There is more to the tree under the ground than above. When Deck Blocks Are a Good Idea Deck Blocks Are Better for Decks Around Tree Roots Frost level footings are more stable and can support more weight, and last much longer than deck blocks.īut if you are okay with a little up and down and are not building a deck to be enjoyed by your grandchildren, then maybe deck blocks are a good idea. If you are not comfortable with the idea of your deck rising and falling with the ground. Deck blocks can only be used for floating decks. How can you determine which is best for your deck? Let me explain more when deck blocks are a good idea, and when they are not.įirst is your level of comfort. Deck blocks are good for some decks, but not all. The use of deck blocks is rarely a good idea for decks requiring permits. It is a bad idea to use deck blocks when attaching the deck to the house, on stable ground or supporting elevated decks, pergolas or a roof. Which type of footings should your deck have?ĭeck blocks are a good idea for low decks, decks around trees, areas with low frost levels and economical decks. The biggest difference between each is from where the deck is supported, below the frost or floating on the ground. Once the mortar joints have become “thumbprint” hard, use a jointing tool to smooth the fresh joints and remove any excess mortar.There are two common footings options for a backyard deck, deck blocks or frost footings, including concrete piles, screw jacks, and many more. Using a mason’s line as a guide for the remaining block, continue building the wall until it is complete. To set the next course of block, apply a one-inch thick mortar bed along top of the first course.Īt the end of the wall, set an “8x8x8” half block into the mortar bed with the smooth side facing out. Repeat steps 6 and 7, adjusting the blocks to be flush and level continue this process until the first course is completed. Using the same process, set the opposite corner block. The mortar should be workable but firm enough to support the weight of the block.īutter the inside end of the first block and then press the block into the mortar bed to create a 3/8 inch mortar joint. Furrow the mortar bed using the tip of the trowel to create a “v” to help distribute the mortar evenly. The proper consistency is achieved when the wet mortar will “hang” on a trowelĭampen the footing surface with water and place a one-inch bed of mortar on the footing. TIP: when preparing to place a trowel full of mortar, gently “snap” the trowel downward to removeĪny excess mortar. Snap a chalk line on each side of the block wall as a reference line. Lay out the block, making sure to leave a 3/8 inch gap between the blocks to allow for the vertical mortar joints (i.e., a typical 8x8x16 block is actually 15-5/8 inches long and 7-5/8 inches high to accommodate the mortar joint). Rebar should be placed in every other masonry core to provide structural support.įor masonry cores over 4 inches wide, QUIKRETE Core Fill Grout – Coarse should be poured around the rebar for masonry cores under 4 inches wide, QUIKRETE Core Fill Grout-Fine should be used. NOTE: it is important to check local building codes for construction requirements in your area.įor load-bearing walls, tie rods should be set a minimum of 6 inches into the concrete footing before it is set. Footings should be a minimum of twice the width of the concrete block (i.e., a typical 8x8x16 block would require a 16-inch wide footing) and extend below the frost line. When working with cement-based products, always wear eye protection and waterproof gloves.Įnsure a solid footing. ![]()
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