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Finally, make sure to account for specialty blocks to finish out your order correctly. If your wall includes 90-degree corners or exposed ends, plan on ordering one corner block per row for each exposed end. These feature smooth, finished ends rather than recessed ears, keeping your edges looking clean. To cap off the project, add solid top or cap blocks along the top row to give the wall a clean, weather-resistant finish. Because standard cap blocks are 16 inches long, you”ll need roughly 0.75 caps per linear foot of wall (or 15 caps for a 20-foot wall). If you”re laying traditional mortared block, don”t forget to grab three to four 80-pound bags of Type S mortar mix for every 100 blocks. Matching these specialized block types and supplies to your layout up front ensures every edge looks intentional, professional, and fully finished.
If you end up purchasing too many blocks (which is always better than buying too few), start by checking your retailer”s return policy. Many major home improvement stores accept returns of unused, undamaged masonry units with proof of purchase, though policies vary. You can also put extra blocks to work in another project. For example, you can by utilizing the hollow open cells as individual planters for low-maintenance greenery, letting you put every single dollar of your masonry order to good use.
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