Insulation & Lining
Insulation is critical in a camper — not just for warmth but to prevent condensation, which is the #1 enemy of van life. Condensation destroys interiors, causes mould, and makes sleeping miserable.
Covers Thinsulate, rigid board, and vapour management. Debunks common myths.
3M Thinsulate is the gold standard for van insulation — breathable, doesn't trap moisture, and easy to work with. Expensive but worth it.
If budget is tight, 25mm Celotex/Kingspan rigid board works well on flat surfaces. Fill gaps with expanding foam.
NEVER use fibreglass loft insulation in a vehicle — it absorbs moisture, sags, and becomes useless.
A Maxxair or Fiamma roof vent fan is essential for ventilation. Crack a window low, vent high — convection does the work.
Clean the bare metal interior thoroughly — remove any rust, treat with rust converter
Apply a sound-deadening mat (Dodo Mat or similar) to large flat panels — reduces road noise and drumming
Cut insulation to fit between the ribs/struts of the van body
For Thinsulate: friction-fit between ribs, secure with spray adhesive if needed
For rigid board: cut to shape, glue with grab adhesive, seal edges with expanding foam
Leave a small air gap behind the insulation where possible — aids moisture management
Line over insulation with ply (3.6mm or 5.5mm) or tongue-and-groove boards
For a car camper: insulated window covers (Reflectix or thermal blinds) are the main insulation strategy
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