An inground flagpole means a flagpole which is placed in the ground. This permanent flagpole can withstand winds upto 130 mph, depending on the flagpole’s material and height. Foundations are necessary for inground flagpoles, read here.

You create the foundation by digging a trench, soaking the soil, and pouring concrete. A cylindrical “groundsleeve”, also known as a “groundsleeve”, will be placed in the concrete. The groundsleeve is a thick, steel cylinder that has an open top and a large base. It protects the flagpole against concrete’s corrosive agents. Steel plates secure the groundsleeve to its exterior. Steel wedges line the inside of the groundsleeve, which will firmly center your flagpole’s bottom. Groundsleeves often include a ground spike to channel lightning. This may not be an issue for flagpoles made of fiberglass.

Flash collars can be included in foundations. These collars can be used to cover the pole’s base and sleeves, giving it a finished appearance. The collar seals the space between pole and collar to keep water out of the foundation and collar.

The foundation should be deep enough that the flagpole can reach underground. This will keep it from bouncing around. This will ensure that the pole is only 10% underground.

Larger flagpoles might require professional help. Ask the distributor or manufacturer if they offer installation free of charge.