Doors, Windows & Hatches – Rubber Seals and Weep Holes

This article is part of our Mars Caravan Body & Seals Care series. For the full overview, see "Mars Caravan Body & Seals Care – Exterior Maintenance Overview".

Doors, windows and hatches are common areas where owners notice water, dust or noise. In many cases the solution is simple: clean rubber seals and clear drainage (weep) holes so they can do their job properly.

1. Types of Seals Around Openings

Your Mars caravan may use:

• Compression rubber seals around doors and hatches.
• Rubber or foam seals around opening window frames.
• Internal gaskets inside frames to help manage water and drainage.

These work together to keep water and dust out while allowing windows and doors to open and close smoothly.

2. Cleaning Rubber Seals

• Use mild soapy water and a soft cloth to gently clean rubber seals.
• Remove built-up dirt, dust and light mould from the seal surface and the area it contacts.
• Rinse with clean water and allow to dry.

Avoid:

• Solvents or harsh cleaners that can dry or damage rubber.
• Scrubbing with anything abrasive that could nick or tear the seal.

If recommended by the seal manufacturer, a light application of a rubber care or silicone-based product (used sparingly) can help keep some seals supple – always follow product instructions.

3. Signs a Door or Window Seal May Be Worn

• Visible cracks, splits or tears in the rubber.
• Areas where the seal is permanently flattened and no longer springs back.
• Obvious gaps when the door or window is closed.
• Water consistently appearing inside in specific locations after rain, even when everything is closed properly.

If you suspect a seal is no longer doing its job, take photos and contact support or a caravan repairer for advice on replacement.

4. Window Weep Holes – What They Are and Why They Matter

Many caravan windows are designed to allow a small amount of water into the outer frame, then channel it back outside through drainage or “weep” holes.

If these weep holes become blocked:

• Water can collect in the frame.
• It may then overflow into the van or appear as water in the lower window track.

5. How to Check and Clear Weep Holes

• From the outside, locate the small slots or holes at the bottom of the window frame.
• Visually check for dust, insect nests or debris blocking them.
• Gently clear with:
  • A soft brush.
  • A piece of plastic (e.g. cable tie) – avoid metal tools.
• Do not enlarge the holes or damage the frame.

After clearing, a gentle hose test (not high pressure) around the window can help confirm that water now drains correctly from the frame to the outside.

6. Condensation vs Leaks Around Windows

Moisture around windows can also come from condensation:

• Warm, moist air inside meets a cold window surface and water droplets form.
• This is common in cooler weather and may run into the lower track.

To reduce condensation:

• Ventilate the van when cooking or showering.
• Use roof hatches or windows on vent where safe.
• Wipe away excess moisture as it appears.

Persistent water in places it shouldn’t be, especially after rain and not just in cold weather, should be investigated as a possible leak or drainage issue.

Summary

Most door, window and hatch issues are solved by keeping rubber seals clean and weep holes clear. Clean gently, avoid harsh chemicals, and check drainage slots regularly. If you’re still seeing unwanted water inside after these basic steps, capture photos and contact support so we can help you find the cause.