How to Install a Vapour Barrier in Your Van and Reduce Condensation for Good

Condensation is one of the most common issues in camper van conversions. Moisture can build up from cooking, breathing, and temperature changes, leading to damp, mold, and unpleasant odors. Installing a vapor barrier is a crucial step to protect your van’s interior and keep it comfortable year-round. At CarInsulation.co.uk, we recommend using SOSHIELD and GlassMAT insulation products for a complete solution.

Why a Vapour Barrier is Essential

A vapor barrier acts as a moisture block, preventing warm, humid air from contacting cold surfaces where condensation forms. Without it, even the best insulation cannot stop condensation from damaging walls, floors, or ceiling panels.

Benefits of a vapor barrier include:

  • Prevents mold and mildew growth.

  • Protects insulation from moisture damage.

  • Improves overall thermal efficiency.

  • Reduces corrosion and rust in metal panels.

Recommended Products from CarInsulation.co.uk

1. SOSHIELD – Thermal & Acoustic Insulation Liner

  • Provides multi-layer thermal insulation while reducing condensation.

  • Self-adhesive, making installation simple and clean.

  • Ideal for walls, ceilings, and bulkheads.

  • Fire-rated and UK-designed for safety and durability.

2. GlassMAT™ – High Temperature Insulation

  • Perfect for engine bays, wheel arches, or areas exposed to heat.

  • Works alongside SOSHIELD to improve thermal efficiency and reduce condensation.

  • Lightweight, durable, and easy to cut to size.

Tip: Combining SOSHIELD on the interior panels with GlassMAT™ in heat-prone areas creates a complete thermal and moisture control system.

Step-by-Step Installation Guide

Step 1: Prepare the Surfaces

  • Remove old panels, carpeting, and trim.

  • Clean all metal surfaces to ensure they are dry and free of dust, grease, or rust.

Step 2: Apply SOSHIELD

  • Measure and cut SOSHIELD sheets to fit walls, ceiling, and bulkheads.

  • Peel off the adhesive backing and press firmly onto the surface.

  • Overlap edges slightly to create a continuous moisture barrier.

Step 3: Add GlassMAT™ in Heat-Prone Areas

  • Install GlassMAT™ on wheel arches, engine bays, or near heat sources.

  • Use adhesive or mechanical fasteners as required.

  • Ensure panels are snug and cover any gaps.

Step 4: Seal Gaps

  • Use vapour-resistant tape to seal seams and edges of the insulation.

  • Pay special attention to corners, roof joins, and around windows.

Step 5: Refit Panels

  • Replace interior wall panels, ceiling boards, or carpet.

  • Avoid piercing the insulation to maintain the barrier.

Tips for Maximum Condensation Protection

  • Ventilate your van with roof vents or trickle vents.

  • Use moisture absorbers during colder months.

  • Regularly inspect insulation for gaps or damage.

  • Combine thermal insulation with a vapor barrier for best results.

Why Choose CarInsulation.co.uk?

  • All products are UK-designed and tested for thermal efficiency and condensation control.

  • SOSHIELD and GlassMAT™ provide a premium insulation system for camper vans.

  • Easy to install with professional-grade performance.

Transform your van into a comfortable, dry, and condensation-free space with SOSHIELD and GlassMAT™ from CarInsulation.co.uk. Shop the full range and get all the tools and materials you need for a professional camper van conversion today.

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Frequently Asked Questions

How to Access Product Instructions on Our Website

Yes, we provide detailed instructions for each product directly on our website. Here's a step-by-step guide to finding and using them:

1. Log in to Your Account:

  • Access your account on our website where your order details are stored.

2. Locate Your Product:

  • Navigate to the product you need instructions for by clicking on it in your order history.

3. Find the Instructions Section:

  • Scroll to the bottom of the product description page. Look for the highlighted section labeled"Instructions - How to Use".

4. Download the PDF:

  • Click on the highlighted section to open the PDF instructions.
  • You can download, print, and refer to these instructions during installation for ease and accuracy.

This straightforward process ensures you have all the guidance needed to install your product effectively.

Absolutely! With years of experience, we’re here to answer all your questions. Simply email us at info@carinsulation.co.uk, and we’ll respond promptly to assist you.

Recommendation:

For most campervan builds, a two-layer approach (sound deadening + foam insulation) provides a great balance between performance and cost. If you’re aiming for maximum efficiency or plan to camp in extreme weather, go for a three-layer system.

If you'd like specific product suggestions, let me know your campervan model and intended use!

Yes, we deliver outside the UK.

Please email us on info@carinsulation.co.uk to receive a quote.

Yes, we offer free collection Monday to Friday, from 9 a.m. to 3 p.m.

We are based in 3 Watling Court, Nuneaton, CV11 6GX

The Standard Delivery takes 3-5 working days.

We also offer Next Day delivery.

It takes 2-5 working days for orders to arrive within the UK Mainland. If your tracking hasn’t updated within 2 working days, please email us at info@carinsulation.co.uk, and we will investigate this for you.

For orders outside the UK mainland, please allow an additional 3 working days.

If you have any questions please email us at info@carinsulation.co.uk, and we will come back to you as soon as possible.

Simply, contact our customer services on 02477 670370 or e-mail info@carinsulation.co.uk and state that you are returning your order so that we could ensure it is processed immediately upon receipt. Send the products back and we will arrange an exchange or refund. 

We are happy to offer an exchange or a refund, provided an item is returned to us unused, in it's original condition and within 30 calendar days of receipt.

You need to take reasonable care when returning an order to us as you will be responsible for the return.

As such, we recommend taking out a tracked, insured return. If you want an alternative product please call us and we can arrange this for you (shipping fee will have to be covered by the customer).

If the delivery fee was included in the price, we will deduct the delivery costs from the refund's total, once return is received.