Wet Footwells: Finding Soft Top Leaks and Keeping Damp Out of a Lotus This Winter

A summer of roof-off driving hides most leaks, and the first week of steady November rain shows them all at once. A damp carpet is not a disaster, but left alone it brings a musty cabin, misted glass and corrosion on anything metal that sits in the wet.

Why these cars let water in

The Elise and its relatives were built to be light, not to be watertight. The soft top is fabric over a simple frame, the frameless door glass meets a rubber seal rather than a metal frame, and the seals themselves compress and harden with age. Our used buying guide already lists wet carpets as a sign of a leaking roof seal or a blocked drain, and the known issues guide lists water ingress from roof seals among the known faults of every Elise-platform car. The fixed-roof Exige S1 and later coupés are better in bad weather, but door seals and bulkhead grommets can still let water through.

Finding the leak before fixing it

Water can enter in one place and pool somewhere else, so test before buying parts. A method owners recommend:

• Take out the mats and dry the floor completely.
• Lay dry paper towels across both footwells and along the sills.
• Run a hose over the car, one area at a time, starting low and working up: sills, door bottoms, door glass, then the roof.
• Look at the paper after each area. The first wet patch tells you roughly where to look.

The usual suspects are the top front corners of the door glass where it meets the roof, the door seals along their length, the rear edge of the soft top, and grommets where cables and pipes pass through the bulkhead. If the glass does not sit firmly against the roof seal when the door is shut, adjustment may help more than new rubber.

Looking after the seals and the roof

Clean the rubber seals with mild soapy water, then treat them with silicone grease or a rubber care product so they stay supple. If water no longer beads on the roof fabric, a fabric proofer will help. Clear any leaves and grit from the gutters and seal channels, because blocked channels send water the wrong way. Where a seal is torn, flattened or hard, replacement is the honest fix.

Keeping a stored car dry

Store a laid-up car with the roof up and the windows shut, and use a breathable indoor cover rather than plastic sheeting, which traps condensation underneath. If the garage is damp, a dehumidifier makes a real difference. Check the footwells every few weeks, and if they are wet, lift the carpets out to dry rather than letting them soak through to spring.

Add the battery care advice and the car should be ready for the first dry spring morning.