Professional Greenhouse Base Installation in Eastleigh. Built for Drainage. Guaranteed 10 Years.

Eastleigh's geology is dominated by London Clay in the north (town centre, Bishopstoke, parts of Chandler's Ford) and lighter Bracklesham Beds sand and gravel further south (Hedge End, West End, Botley). London Clay is notorious for shrink-swell behaviour — expanding by up to 10% when wet and cracking as it dries. The gravel terraces drain well but can shift without proper compaction. We assess each Eastleigh garden individually because ground conditions can vary dramatically even within a single street.

Drainage is the single biggest challenge for greenhouses on Eastleigh's London Clay. The dense clay acts as a natural barrier, preventing water from percolating through. We install French drains or perimeter gravel channels around every greenhouse base on clay ground, directing excess water to a soakaway or existing drainage system. On gravel soils near Hedge End, open-jointed paving slabs provide excellent natural drainage without additional infrastructure.

Eastleigh is generally well-sheltered. The Itchen Valley provides natural protection from the worst of the prevailing south-westerly winds, and urban development creates effective windbreaks in most residential areas. Gardens on higher ground in Chandler's Ford can be more exposed. We recommend positioning greenhouses near a boundary wall, fence, or mature hedge for additional shelter — especially important if your greenhouse will contain tall tomato plants or trained fruit that could be damaged by wind-rocked glass panels.

Eastleigh sits in the sheltered Itchen Valley at 20-40 metres above sea level. The river corridor moderates temperatures, making hard frosts less common than on exposed Hampshire downland. However, cold air can pool in low-lying areas near Bishopstoke and the riverside meadows. A properly levelled and sealed greenhouse base minimises heat loss through gaps, giving your plants valuable extra degrees of protection on frosty nights.