conversion cellar Somerset

Case Study / Waterproofing 

Wine cellar in a country house, Somerset

Waterproofing an existing space to convert it into a wine cellar

conversion cellar Somerset

A beautiful country house in Somerset, built around 1850 of local Bath stone elevations had everything but a wine cellar. The existing cellar was damp and not fit for purpose without critical changes to it. The right conditions and the correct environment needs to be ensured preventing moisture from forming inside the wine cellar walls.

MacLennan was contacted by Martin Blake Associates, an architect based in Bath. They required our advice on the most appropriate form of waterproofing to provide a dry environment to convert the existing cellar space into a wine cellar.

This needed to be a fully compliant waterproofing system that could be guaranteed.


Sumps and pumps drainage
waterproofing coverting cellar


MacLennan’s specialist design team suggested that lime inhibitor should be applied to the concrete floors and then fix a System-08 ventilated Cavity membrane  from floor to ceiling. The lime inhibitor is applied to prevent the ‘leaching’ of free lime from the concrete. Thick floor insulation would then be laid onto the new flag stone floor prior to the membrane being laid. A hydrodrain would be fitted around the wall-floor join with wall mounted directional inspection ports, which is critical to comply with BS8102 waterproofing standard. The works could be fully guaranteed and also include MacLennan’s yearly service warranty so the system could be inspected for any blockages.

MacLennan also supplied a Hydrosump-Pro and installed a backup pump with CP9 Pump controller incorporating a high-level water alarm. These pumps were installed to allow for any future water ingress to be carried away from the property.


MacLennan delivered a completely new waterproofing system for this client in Somerset to make sure that the wine cellar is waterproofed to the highest standard and will be dry for many years to come. Any choice of interior design fittings could be applied to the cellar walls after waterproofing membrane has been installed. The work was carried out in the agreed time frames and within budget.

MacLennan guaranteed the work, and it was all covered by our 10million PI.


MacLennan waterproofing technician Bristol
MacLennan techincian Bristol

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