Cindy is unsure which type of mortar to use for repairing unsightly cracks in her brick patio. Which type would be her best option?

When selecting mortar for repairing unsightly cracks in a brick patio, using Type N mortar is often the best choice due to its balanced properties. Type N mortar is a medium-strength mortar with a high resistance to weathering and can withstand moderate loads, making it suitable for applications like brick patios that experience exposure to the elements and some level of structural stress.

Type N mortar has a compressive strength of about 750 psi, which makes it robust enough for masonry work, including repair situations where flexibility and durability are required. Additionally, its workability allows for easier application and finishing, which is beneficial for DIY repairs.

On the other hand, Type M mortar, while stronger with a compressive strength of 1,800 psi, is more rigid and may not be as forgiving in terms of expansion and contraction due to temperature changes, which could lead to further cracking over time in the more flexible brick structure. Type S mortar, though also a good option with a compressive strength of 1,200 psi, tends to be used in scenarios where more tensile strength is required, such as structural walls. Type O mortar is the weakest option with only 350 psi of strength and is typically used in interior applications where structural support is not critical.

Therefore,