Whether you are flying the Union Flag outside your business premises, displaying sponsor branding at a sports venue or adding a statement feature to a civic building, a properly installed flagpole makes all the difference. At Hampshire Flag Company, we have been installing flagpoles across the UK and internationally since 1981. As a three-generation family business, we have seen just about every installation scenario there is. In this guide we walk you through everything you need to know, from choosing the right pole and getting your foundations right to knowing when to call in the professionals.
Choosing the Right Flagpole
Before anything goes in the ground, you need to select the right flagpole for your site and application. The key decisions are:
- Height: We supply and install flagpoles from 4m to 20m and above. The right height depends on the size of your site, the flags you intend to fly and any planning or building regulations that apply to your location.
- Material: Tapered glassfibre is the most common choice for commercial and civic installations. It is lightweight, corrosion-resistant and low maintenance.
- Halyard system: External halyard systems use a rope and cleat on the outside of the pole and are straightforward to operate. Internal halyard systems route the rope inside the pole for a cleaner appearance and added security, making them popular for corporate and public-facing locations.
- Mounting type: Ground-mounted poles are the most common, installed either into a hinged base plate or directly into a ground socket. Wall-mounted poles are fixed to a building facade and are ideal where ground space is limited. In this guide however, we will be primarily focusing on ground mounted flagpole installations.
How to Install a Ground-Mounted Flagpole with a Hinged Base Plate
Our 4m to 12m glassfibre flagpoles use a hinged base plate system, which makes erecting and lowering the pole significantly easier than a fixed socket installation. Here is a step-by-step guide to the full process:
1. Dig the foundation.
The size of the hole depends on the height of your flagpole. Use the table below as your guide. Always check for underground services before digging.
| Flagpole Height | Foundation Width | Foundation Depth |
| 4m to 6m | 35cm x 35cm | 85cm |
| 7m to 8m | 35cm x 35cm | 95cm |
| 9m to 12m | 65cm x 65cm | 125cm |
2. Mix and pour the concrete.
Use a good quality soft cement mixed to a ratio of 1 part cement to 2 parts sand to 3 parts pea gravel (20MN/m2). Fill the hole and press the anchor bolts into the concrete. Leave a gap of approximately 30mm between the tilt plate and the surface of the concrete to allow for later adjustment of the flagpole – we find the best way to do this is by placing a plank of wood underneath the baseplate to prop it above the concrete.
3. Set the tilt plate level.
Vibrate the air out of the concrete and position the tilt plate carefully, allowing enough clearance for the flagpole to be raised. Allow the concrete to cure fully before proceeding. This typically takes 3 to 7 days depending on the season and weather conditions.
4. Mount the finial, halyard and belaying cleat.
Before erecting the pole, mount the pole capping on the top of the flagpole and secure the finial using the longest screw. Mount the cleat at least 125cm from the bottom of the pole, on the opposite side to the joint. Fasten the screws until they hold but do not over-tighten. Pass the halyard through the finial and fasten it to the cleat around the pole.
5. Connect and erect the flagpole.
Once the concrete has fully set, connect the upper bracket on the flagpole to the baseplate. Walk the flagpole up until vertical and fasten to the baseplate using the nuts.
6. Set the flagpole vertical.
Use the 3 nuts on each anchor bolt to adjust the vertical position of the pole. Once the flagpole is perfectly vertical, tighten all 9 nuts fully. To prevent the halyard from slapping against the pole, wind it once around the pole after rigging.
Getting the foundation right is the single most important step in any flagpole installation. An undersized or poorly mixed foundation is the most common cause of flagpole failure. If you are in any doubt, speak to us before you dig.
Installation for flagpoles with internal halyard systems vary slightly from the above, as the poles come pre-fitted with the halyard already in place.
Innovia flagpoles rooftop view
Flagpole Maintenance After Installation
Hampshire Flag Company flagpoles have a smooth, shiny and stain-resistant surface which under normal conditions will remain clean for several years. If the pole is exposed to exhaust fumes, smoke or other sources of surface contamination, it can be cleaned using a cloth or sponge with hot soapy water. After a few years it is worth treating the pole with wax to help it retain its surface finish and glossy appearance.
Most importantly, all bolts on the base plate must be checked and tightened every year to prevent metal fatigue. Annual tightening is not optional and neglecting it can lead to serious structural problems over time. We recommend having your flagpole professionally serviced by HFC each year as part of this process.
Wall-Mounted Flagpole Installation
Wall-mounted flagpoles present a different set of considerations. The pole must be fixed securely to the building structure using the correct fixings for the substrate and the bracket must be positioned and angled to suit the intended flag size and projection.
For installations at height on building facades, access is a key factor. Where a MEWP cannot reach the mounting position, our rope access trained operatives can carry out the installation safely and cost-effectively. This is a particular advantage for hotels, civic buildings and heritage properties where erecting scaffold for a single installation would be impractical or prohibitively expensive.
For sites in exposed or particularly windy locations, or where a greater projection from the wall is needed, we can fabricate bespoke brackets specifically engineered for the demands of the installation.
Wallmounted Flag Pole, Union Jack Flag
When to Contact a Professional Flagpole Installer
Some installations are straightforward and can be managed by a competent individual. Many require professional expertise.
You should contact a qualified flagpole installer when:
- The pole is over 6m in height
- The installation is on a commercial, civic or public-facing site
- The site is in an exposed or coastal location with high wind loading
- The pole is to be wall-mounted at height
- The installation is on a listed building or within a conservation area
- The site has limited or difficult access for standard plant and machinery
- You need documentation for health and safety or insurance purposes
Our Professional Installation Service
Hampshire Flag Company offers a complete supply and installation service for flagpoles from 4m to 20m and above. We manage every aspect of the process from initial survey through to commissioning and handover. Our team holds IPAF qualifications for MEWP operation and rope access capability for challenging installations and all working at height activity is underpinned by full risk assessments and method statements.
Because we hold extensive stock at our 17,000 sq ft warehouse facility in Hampshire, including flagpoles across the full size range and a comprehensive range of fittings and accessories sourced from suppliers worldwide, we can move quickly from agreement to installation. We hold ISO 9001:2015 accreditation and bring the same standards to every job regardless of scale.
To arrange a site survey, discuss your requirements or request a quotation, contact our installations team today.
Specifications correct at time of publication. Please see individual product pages for full details or contact us for a tailored recommendation.