Habitation Door Seal Replacement & Adjustment

What This Is

A worn habitation door seal is one of the most common causes of draughts, water ingress, and heat loss in motorhomes and caravans. This guide covers replacement and adjustment.

Tools & Parts Required

Step-by-Step Instructions

1. 1

   Close the habitation door and inspect the seal around the entire perimeter. Look for: compression failure (seal no longer springs back), tears or cuts, sections that have pulled away from the door frame, and gaps where the seal does not contact the door aperture. A draught test with a lit incense stick will reveal air leaks.

2. 2

   Take a short section of the old seal to a caravan accessory supplier or measure the cross-section carefully. D-section, P-section, and bubble seals are the most common profiles. Seals are sold by the metre — measure the door perimeter and add 10% for waste.

3. 3

   For channel-fit seals: use a trim removal tool to lever the seal out of the channel. For adhesive seals: peel away carefully and use solvent to remove adhesive residue. Clean the entire seal channel or bonding surface thoroughly.

4. 4

   Channel type: starting at the bottom corner, push the new seal firmly into the channel. Work around the door perimeter, ensuring the seal seats fully. At corners, cut the seal at 45° for a neat mitre joint. At the end, cut the seal so the two ends butt together neatly at the bottom.

5. 5

   Adhesive type: apply contact adhesive to both the door frame and the back of the seal. Allow to become touch-dry (5–10 minutes). Starting at a bottom corner, press the seal firmly into position, working around the perimeter. Apply masking tape to hold in position while the adhesive cures.

6. 6

   If the door does not compress the seal evenly, the door may need adjustment. Most habitation doors have adjustable hinges — loosen the hinge bolts slightly and adjust the door position until the seal compression is even. Tighten the hinge bolts and recheck.

7. 7

   Close the door and repeat the incense stick draught test. All draughts should be eliminated. Check that the door closes easily without excessive force — if it requires significant force, the seal is too thick or the door needs further adjustment.

Common Mistakes to Avoid

When to Call a Professional