What Size Parasol Base Do I Need? UK Weight Guide

Getting the base weight wrong is the single most common parasol mistake. Too light and the parasol leans, spins or blows across the garden. This guide gives exact weight recommendations by parasol size and type, explains the difference between centre pole and cantilever bases, and covers everything you need to know about pole sizes and fillable bases before you buy.

In this article

• Base weight by parasol size: the quick reference guide
• Why cantilever parasols need a heavier base
• Does going through a table change anything?
• Fillable bases: sand vs water and how much you need
• Pole diameter: 38mm vs 48mm and how to check
• Types of parasol base
• Bases on different surfaces: patio, decking and grass
• Common mistakes and misconceptions
• Frequently asked questions

Base weight by parasol size: the quick reference guide

Use this table as a starting point. Add roughly 10 to 20kg to the centre pole figures if your garden is exposed, elevated or regularly windy.

These are sensible minimums for a sheltered UK garden at typical wind speeds (15 to 25mph). If your garden is exposed, coastal, hillside or open-facing, increase by one tier. You will almost never regret a base that is too heavy. You will frequently regret one that is too light.

Why cantilever parasols need a heavier base

A cantilever or banana parasol uses an offset side pole that extends the canopy on a lateral arm. This transfers the wind load at an angle rather than straight down, creating significant leverage on the base. The result: a 3m cantilever needs roughly double the base weight of a 3m centre pole parasol.

For a 3m cantilever, 80 to 100kg is the sensible minimum. For 3.5m and above, 100 to 120kg or more. Cantilevered weight at the end of a 2m arm exerts far more rotational force on the base than a pole planted directly through the centre.

The base also needs a wide enough footprint to resist tipping. Most purpose-built cantilever bases use a cross-frame or four-plate design to provide this, which is why a standard plate base is not suitable for a cantilever regardless of weight.

Cantilever base

100kg Heavy Duty Cantilever Parasol Base

A 4-piece fillable base that reaches 100kg when filled with sand. The circular cross-frame design gives the wide footprint cantilever parasols need. Suitable for 3m cantilevers in sheltered gardens.

£58.99 View this base →

Does going through a table change anything?

Yes, but not in the way most people assume. Threading a parasol through a table hole does reduce the base weight you need, because the table acts as ballast and provides lateral stability. It does not eliminate the need for a base entirely.

A sturdy dining table reduces the required base weight by roughly 10 to 20kg for a standard 3m parasol, bringing the requirement from around 40 to 50kg free-standing down to around 20 to 25kg through-table in a sheltered position. However the table must be solid and heavy enough to contribute meaningfully, the pole must fit the table hole snugly, and in wind the table reduces but does not replace the base.

Fillable bases: sand vs water and how much you need

Most bases at the 40kg+ level are fillable. The important thing to understand: sand is significantly heavier than water for the same volume.

A base advertised as "100kg" typically achieves that weight when filled with sand, not water. Filling the same base with water will produce around 65 to 70kg. Sand is the better choice for permanent setups as it does not evaporate, does not freeze and expand in winter, and provides consistently more weight.

Fillable cantilever base

Base For Cantilever Parasol, Fillable, 4-Piece, Black

A 4-piece fillable cross-base for cantilever parasols. Fill with sand for maximum weight; each plate fills separately so you can increase weight incrementally. Ships light, you add the weight on-site.

£72.99 View this base →

Pole diameter: 38mm vs 48mm and how to check

Most parasol poles are either 38mm or 48mm in diameter. This must match your base's pole hole. Get it wrong and you end up with a pole that will not fit or one that spins loosely, one of the most common buyer complaints.

To check: measure across the widest point of the pole. Most parasols state the pole diameter in the product spec. 38mm is the most common size on standard garden parasols; 48mm tends to appear on larger models. Most quality bases include reducer rings in multiple sizes (typically 32mm, 38mm, 48mm). Confirm your base covers your pole size before ordering, and use the tightening screw on the base to eliminate any remaining movement once the pole is in.

Centre pole base

Parasol Base for 38mm and 48mm Poles, Bronze

Compatible with both 38mm and 48mm poles. A solid starting base for smaller centre pole parasols up to around 2.5m in a sheltered position, or for through-table use.

£33.99 View this base →

Types of parasol base

Solid concrete or cast iron — consistent weight straight out of the box, no filling required. Best for exposed positions where maximum stability matters and portability is not a concern.

Resin fillable (plate or cross-frame) — ships light and you fill on-site with sand or water. Most practical for most buyers. The multi-plate cantilever design provides the footprint cantilever parasols need.

Wheeled fillable — same as resin fillable but with wheels, allowing you to move the parasol without emptying the base. Check the wheels are large enough to roll over your surface type.

Table-mounted bases — small bases that sit within the table frame. Only suitable for through-table centre pole parasols. Completely inadequate for free-standing use.

In-ground — a permanent socket concreted into the ground or deck. Maximum stability, zero tipping risk. Not moveable.

Bases on different surfaces

Paving and patio: most weighted bases work well. Ensure the base sits flat and level. A rubber mat under the base protects paving from scratching.

Decking: concentrated weight can dent composite decking. Spread the load with a wide base plate or deck protector pad. Check joist spacing before positioning a heavy cantilever base.

Grass and soil: solid bases can sink into soft ground. A wide plate or cross-frame base works better than a narrow-footed unit. For a cantilever on grass, fill to maximum weight with sand.

Common mistakes and misconceptions

"The base that came with my parasol is enough." Often it is not. Bundled bases are frequently at the minimum for optimal conditions, not for a typical UK garden with wind.

"100kg means it weighs 100kg." A fillable base advertised as 100kg only reaches that weight filled with sand. Filled with water, the same base typically reaches 65 to 70kg.

"I thread through the table so I do not need a base." The table provides lateral support but is not a substitute for a base. In any meaningful wind, an unweighted through-table parasol will move.

"Any base fits any parasol." Pole diameter compatibility matters. Measure first or confirm the base includes reducer rings for your pole size.

"More weight is overkill." Nobody has ever complained their parasol base was too stable.

Frequently asked questions

What size base do I need for a 3m parasol?

For a 3m centre pole free-standing: 40 to 50kg. Through a dining table in a sheltered garden: 20 to 25kg. For a 3m cantilever: 80 to 100kg minimum. Add 10 to 20kg for an exposed or coastal garden.

How heavy should a cantilever parasol base be?

Minimum 80 to 100kg for a 3m cantilever. 100 to 120kg for 3.5m. 120kg or more for larger sizes or exposed positions. The offset arm creates significant leverage on the base, requiring roughly double the weight of a centre pole parasol of the same diameter.

Do I need a base if my parasol goes through the table?

Yes, but a lighter one. A solid table reduces the required base weight by around 10 to 20kg. A 20 to 25kg base with a 3m centre pole through a solid dining table in a sheltered garden is adequate. Never use the table alone without any base.

Sand or water, which is better for a fillable base?

Sand. It weighs roughly 50% more per litre than water (approximately 1.5kg/L vs 1kg/L), does not evaporate in summer or freeze in winter, and provides consistently higher weight. Water is acceptable for occasional use, but for a permanent setup fill with sand.

Are all parasol poles the same size?

No. The two most common diameters are 38mm and 48mm. Always measure your pole or check the spec before buying a base. Most quality bases include reducer rings to fit multiple pole sizes. A loose-fitting pole will spin and wear out the base fitting over time.

What is the best base for a windy garden?

For a centre pole: a solid concrete or cast iron base at the top of the weight range for your parasol size, or a fillable base filled with sand. For a cantilever: a four-plate cross-base filled with sand to 100kg+. Close the parasol in winds above 25mph regardless of base weight.

Can I use a parasol base on decking?

Yes, with care. Use a wide base plate or rubber mat to spread the load and protect the surface. Check the joists below can handle the weight concentration. Wheeled bases work on smooth decking but small wheels can catch on board gaps.