How much insulation do I need?

Select your van, coverage level and preferred products to get an instant shopping list with pack quantities and estimated costs.

Quantity calculator
Ford Transit
Mercedes Sprinter
VW T6
Vauxhall Vivaro
Peugeot Boxer
Step 1 — choose your van
Step 2 — choose your coverage level
30%Spot treatment
50%Basic / budget
75%Recommended
90%Full build
100%Maximum

75% coverage is the standard recommended level — covers all flat panels while leaving ribs and edges for the fleece layer.

Step 3 — choose your foam liner
Choose one foam liner — SOShield and GlassMAT XR both work excellently. Switching updates all quantities and costs below.
SOShieldAll-in-one foam + vapour barrier
GlassMAT XRFoil-backed thermal liner
Step 4 — select products to include
Sound deadening (PeaceMAT XR)
Foam liner (selected above)
Thermo fleece (ABSOFT 25mm)
Floor barrier (PeaceMAT XXX)
Engine bay heat shield
Area breakdown
Products and quantities
Estimated total£0.00

Quantities include a 10% wastage allowance. Pack quantities are rounded up to the nearest whole pack. Prices are estimates based on current standard pack sizes — check the website for live pricing. Actual cost may vary depending on which pack sizes you select.

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The Ford Transit is the UK's most popular van conversion base. Its generous internal volume and multiple wheelbase options make it ideal for full-time builds and weekend campers alike.

Internal length (LWB)
3.5 m
Internal width
1.76 m
Internal height (H2)
1.90 m
Area reference — LWB
Side walls Primary thermal layer14.0 m²
Roof Priority — biggest heat loss6.5 m²
Floor Sound + cold barrier6.0 m²
Doors Sound deadening focus3.5 m²
Wheel arches Vibration & noise2.0 m²
Step-by-step installation guide
1
Sound deadening — all metal panels
Apply PeaceMAT XR butyl mats directly to bare metal on walls, roof, floor and wheel arches. Aim for 60–80% coverage on walls and 100% on the floor pan. Use a seam roller to press firmly and eliminate air pockets.
2
Foam liner — walls and roof
Apply SOShield or GlassMAT XR directly over the deadening layer. Both act as a vapour barrier and thermal layer. Pay particular attention to the roof and wheel arches where condensation is most likely to form.
3
Thermo fleece — ribs and cavities
Pack ABSOFT 25mm fleece firmly into the corrugated ribs along the walls and roof. This is your primary thermal layer — the more you pack in the warmer your van will be. The fleece compresses without losing performance.
4
Floor — rubber barrier and foam underlay
Lay PeaceMAT XXX MLV across the entire floor. This blocks road noise and prevents cold rising from below. Follow with 6mm closed cell foam before fitting your final flooring.
5
Engine bay bulkhead
The bulkhead between cab and load area is where most heat and noise enters. Apply GlassMAT HTX to the engine side, then PeaceMAT XR on the cab-facing side for maximum noise reduction.
Transit specific tips
The Transit has a ribbed floor with significant cavities — pack these with ABSOFT fleece before laying your floor boards for maximum thermal performance underfoot.
The rear barn doors have large flat panels ideal for sound deadening. Two layers of PeaceMAT XR here gives a noticeably quieter and more solid door sound.
H2 and H3 high roof variants have a distinctly larger roof area — add approximately 20% to your roof quantity.
Building a Ford Transit? Get an accurate shopping list instantly.
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The Mercedes Sprinter offers the tallest interior of any common conversion base — the top choice for standing-height builds, professional conversions and full-time van lifers who need maximum space.

Internal length (LWB)
4.3 m
Internal width
1.76 m
Internal height (H2)
1.96 m
Area reference — LWB
Side walls Primary thermal layer18.0 m²
Roof Priority — largest surface8.0 m²
Floor Sound + cold barrier7.5 m²
Doors Sound deadening focus4.0 m²
Wheel arches Vibration & noise2.0 m²
Step-by-step installation guide
1
Sound deadening — panels and roof
The Sprinter's large flat side panels are highly prone to resonance. Apply PeaceMAT XR at 80–100% on walls and the wide flat roof. The Sprinter roof is particularly large — budget extra material and don't underestimate this area.
2
Foam liner — walls and roof
Apply SOShield or GlassMAT XR over the deadening on walls and roof. The Sprinter's taller height means considerably more surface area than a Transit — carefully measure before ordering.
3
Thermo fleece — ribs and upper cavities
Pack ABSOFT 25mm fleece deep into the Sprinter's prominent roof ribs. The Sprinter has more pronounced ribs than a Transit, creating larger cavities ideal for deep fleece packing.
4
Floor treatment
Apply full floor coverage with PeaceMAT XXX MLV followed by 6mm foam underlay. The Sprinter floor sits slightly lower than Transit — ground cold is a bigger concern here so never skip the MLV layer.
5
Cab area and bulkhead
The Sprinter cab generates significant engine noise through the bulkhead. Applying GlassMAT HTX on the engine side makes a very noticeable difference to driving comfort on long journeys.
Sprinter specific tips
The Sprinter has plastic side trims that must be removed before insulating — take photos before removal as reinstallation can be tricky.
High roof (HR) Sprinters have significantly more wall and roof area — add approximately 15% more material to all wall and roof quantities.
The twin rear door has large glass sections — insulate door frames and lower metal sections but never cover the glass areas.
Building a Sprinter? Get an accurate shopping list instantly.
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The VW Transporter T6 (and T6.1) is a premium compact platform — ideal for stealth camping, weekend adventures and those who want a van that doubles as a daily driver.

Internal length (LWB)
2.8 m
Internal width
1.70 m
Internal height
1.55 m
Area reference — LWB
Side walls Slim foam recommended9.0 m²
Roof Priority — noise source4.2 m²
Floor Sound + cold barrier3.8 m²
Doors Sound deadening focus2.5 m²
Wheel arches Tyre noise reduction1.2 m²
Step-by-step installation guide
1
Remove all factory trim panels carefully
The T6 uses plastic clips throughout — a proper trim removal tool prevents damage to these expensive panels which you'll need to refit later.
2
Sound deadening — prioritise roof and floor
The T6's thinner body panels transmit more road noise than Transit or Sprinter. Apply PeaceMAT XR at 80–100% everywhere accessible — the roof and floor are highest priority.
3
Slim foam liner — walls and roof
Space is tight in the T6. GlassMAT XR's slim foil-backed profile is particularly well suited here. Every centimetre of internal width matters in this van — 6–8mm is the recommended maximum thickness.
4
Thermo fleece — ribs only
Pack ABSOFT 25mm fleece into the ribs only — don't add a full fleece layer across the whole surface as this will make refitting the factory trim panels very difficult.
5
Floor — slim MLV treatment
Use 5mm PeaceMAT XXX for floor sound deadening rather than thicker MLV options to maintain adequate headroom. Follow with the thinnest available foam underlay.
T6 specific tips
The sliding door area is a major cold entry point — pack around the door seal channel with closed cell foam strips to eliminate draughts in winter.
Factory VW trim panels refit with very tight tolerances — always do a test fit before fully committing to thicker products.
Also applies to the T5 — both generations share a very similar body structure and these quantities apply equally to both.
Building a VW T6? Get an accurate shopping list instantly.
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The Vauxhall Vivaro (and its twins the Renault Trafic, Nissan Primastar and Fiat Talento) is a popular, affordable base — compact, reliable and great for budget-conscious first-time converters.

Internal length (LWB)
2.9 m
Internal width
1.62 m
Internal height
1.56 m
Area reference — LWB
Side walls Primary thermal layer10.0 m²
Roof Priority — heat & condensation4.8 m²
Floor Sound + cold barrier4.2 m²
Doors Sound deadening focus3.0 m²
Wheel arches Prominent — treat carefully1.5 m²
Step-by-step installation guide
1
Sound deadening — prioritise floor and roof first
The Vivaro has a notably louder road noise character than Transit or Sprinter. Apply PeaceMAT XR at 100% on the floor and roof before treating the walls — this gives the biggest noise reduction for money spent.
2
Foam liner — walls
Apply SOShield or GlassMAT XR to the walls. The Vivaro's interior is slightly narrower than Transit — 10mm is the recommended maximum thickness to retain a usable internal width.
3
Thermo fleece — ribs
Pack ABSOFT 25mm fleece into wall and roof ribs. The Vivaro's ribs are shallower than the Transit but there are more of them — work methodically from the front bulkhead towards the rear.
4
Floor barrier — essential in this van
Apply PeaceMAT XXX MLV to the full floor area. The Vivaro sits lower to the road than Transit or Sprinter so cold from below is more significant — the MLV floor layer is essential, not optional.
5
Wheel arches — careful wrapping
The Vivaro's wheel arches are very prominent. Wrap each arch with flexible closed cell foam strips. Apply PeaceMAT XR deadening directly over each arch first to reduce tyre rumble before the foam layer.
Vivaro specific tips
All quantities apply equally to the Renault Trafic, Nissan Primastar and Fiat Talento — all share the same platform and body dimensions.
Older Vivaro models (pre-2014) can have rust around rear door seals — treat any bare metal with rust converter before applying insulation.
Building a Vivaro or Trafic? Get an accurate shopping list instantly.
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The Peugeot Boxer (also sold as the Citroen Relay and Fiat Ducato) is a large, affordable base popular with full-time van lifers. Its wide floor and generous height make it excellent for crossways bed layouts.

Internal length (LWB)
3.7 m
Internal width
1.87 m
Internal height (H2)
1.93 m
Area reference — LWB
Side walls Primary thermal layer16.0 m²
Roof Priority — curved profile7.5 m²
Floor Sound + cold barrier7.0 m²
Doors Sound deadening focus3.5 m²
Wheel arches Vibration & road noise2.0 m²
Step-by-step installation guide
1
Sound deadening — walls, floor and roof
The Boxer's large flat panels boom very significantly without deadening. Apply PeaceMAT XR at 60–80% on walls and 100% on floor and roof. The Boxer is noisier than Transit or Sprinter on poor road surfaces — deadening investment pays off greatly here.
2
Foam liner — full coverage
Apply SOShield or GlassMAT XR across all wall and roof surfaces. The Boxer's wide width means the roof is especially large when measured accurately — always measure the actual arc length of the curved roof, not just the straight-line width.
3
Thermo fleece — ribs and lower cavities
The Boxer has deep cavities particularly in lower wall sections and floor ribs. Pack generously with ABSOFT 25mm fleece — these lower cavities are a significant cold bridge if left empty.
4
Floor — two zone treatment
The Boxer's FWD layout makes the cab floor very warm. Apply GlassMAT HTX to the cab floor and tunnel. Use PeaceMAT XXX MLV for the main load area floor treatment.
5
Cab doors and dashboard bulkhead
The Boxer cab is considerably noisier than equivalent Transit or Sprinter cabs. Treating the front doors and dashboard area with sound deadening creates a noticeably more refined driving environment.
Boxer specific tips
All quantities apply equally to the Citroen Relay and Fiat Ducato — identical platform and body structure.
The Boxer roof has a distinctive curved profile — measure the actual arc length across the curve, not the straight-line width. The difference can be up to 15% more material than expected.
The large engine cover between the front seats gets extremely hot — always use GlassMAT HTX here, not standard closed cell foam.
Building a Boxer, Relay or Ducato? Get an accurate shopping list instantly.
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