Choosing foam sheets for caravan or motorhome seat cushions means balancing comfort with limited space. The same area may be used for sitting, relaxing and, in some layouts, part of a temporary sleeping platform.
Vehicle seating can be shallower than a domestic sofa, often sits over a rigid storage base and may include angled or tapered cushions. This guide explains how to compare the current All Foam upholstery grades for dry interior caravan and motorhome seating without assuming one firmness suits every conversion.
Separate seating foam from mattress foam
Upholstery foam sheets are useful for seat cushions, backrests and bench pads. A purpose-built mattress has a different job and may use a layered construction.
If the project is mainly a non-standard sleeping surface, see the custom foam mattress for caravans, motorhomes and boats guide instead.
For a dinette that converts into a bed, think about both modes. A very firm shallow seat may work well around a table but feel different when several cushions are placed together for sleeping. A soft cushion chosen mainly for lying down may compress too far over a solid locker top when used as a seat.
Check the available cushion depth first
Caravan furniture is built around compact dimensions. Increasing cushion thickness can affect table height, leg room, storage access, window clearances and the way a bed conversion fits together.
Measure the current finished depth and surrounding furniture before changing it. If several cushions form one bed platform, check whether their finished heights need to align.
A shallow cushion has less foam between the user and the base, so firmer seating grades can be useful where depth is restricted. A deeper cushion can allow more movement and may not need the same very firm product.
The foam sheet thickness guide explains why firmness and depth should be considered together.
Compare the current All Foam seating grades
Medium Foam Sheet
Medium Foam is a versatile medium-density grade for general upholstery, back cushions, padding and everyday foam projects. It may suit backrests and some seating where a balanced feel is wanted and the cushion has enough depth.
For shallow, frequently used seat bases, compare it against firmer options rather than assuming a medium label is suitable for every layout.
High-Firm Foam Sheet
High-Firm Foam is specifically suitable for seating, benches and projects needing extra firmness. That makes it a useful product to compare for caravan bench seats and motorhome dinettes built over rigid storage boxes.
Reflex Pink Medium and Reflex Grey Firm
Both Reflex grades are suitable for seating and use instant-recovery foam. Reflex Pink Medium is the slightly softer of the two. Reflex Grey Firm provides a firmer, resilient feel.
They are useful premium options when responsive recovery matters, with the choice based on preferred feel and cushion construction.
Severe Very Firm Foam Sheet
Severe Very Firm is designed for seating that requires extra firmness, particularly thinner cushions under around 2 or 3 inches. That makes it relevant to some compact vehicle seats where the furniture leaves little room for depth.
It is deliberately very firm. Do not choose it simply because the cushion is in a motorhome or caravan.
Reconstituted foam
All Foam also sells 6lb and 9lb reconstituted foam sheets for dense contract, commercial and specialist applications. Reconstituted foam is made from bonded foam fragments and feels different from conventional comfort upholstery foam.
The 6lb product is listed for very firm contract seating, while the 9lb grade is super-dense and suited to applications including commercial seating and industrial matting. Use them where those characteristics are actually required rather than as a default touring cushion.
The foam density versus firmness guide explains why density and firmness are not interchangeable terms.
Measure every cushion position separately
Vehicle interiors are rarely perfectly square. Wheel arches, wall tapers, cupboards and bed-conversion mechanisms can create cushions that look similar but are not identical.
Number each cushion before removing the old inserts. Record width, length and thickness for every piece and note which edge faces the wall, aisle or neighbouring cushion.
For tapers or clipped corners, sketch the shape and label every dimension. Measure the furniture opening as well as the existing foam because old inserts may have compressed or been trimmed inaccurately.
The how to measure foam guide gives a general method. For complicated shapes, contact All Foam before assuming a rectangular full sheet will be enough.
Check how the cushions form a bed
In many layouts, seat bases and backrests are rearranged at night. Individual pieces therefore need to line up closely enough to create the intended platform.
Before changing thickness, lay out the full bed arrangement and check which cushions meet. A thicker replacement in one position can create a step. If the original layout deliberately uses different depths, record them rather than forcing every piece to one size.
If regular sleeping has become more important than daytime conversion, a made-to-measure mattress may be the better route. The non-standard mattress sizes guide explains when a bespoke mattress is worth considering.
Inspect the base underneath
Many caravan seats sit directly on plywood locker lids or framed boards. Check for loose panels, damaged hinges, projecting screws and uneven joints before fitting new foam.
Foam cannot correct a weak structure. A rigid base can also make the finished cushion feel firmer than the same foam on webbing or springs, so consider the base when comparing grades.
Check covers and removable pieces
Caravan cushions are often moved to access storage or create the bed. Inspect each cover, zip, seam and section of piping before ordering replacement inserts.
A tight cover can increase perceived firmness. Fibre wrap can create a fuller appearance but changes the finished dimensions, so include any additional upholstery layer in the plan.
If cutting a full sheet yourself, mark the orientation of left and right shapes carefully. The how to cut foam sheets at home guide covers safe preparation and straight cutting.
Keep standard upholstery foam dry
Flexible polyurethane upholstery foam is intended for dry interior seating. Caravans and motorhomes can experience condensation and long periods of storage, so ventilation and moisture control matter.
Check for leaks around windows and rooflights and let damp covers dry fully before storage. If cushions will be directly exposed to persistent water, standard indoor upholstery foam may not be suitable. The open-cell versus closed-cell foam guide explains the structural difference between comfort foam and specialist closed-cell materials.
Check the required fire information
All Foam identifies fire-retardant upholstery grades on the product cards and provides individual technical data sheets. Vehicle conversions can have project-specific requirements, so do not assume a general domestic furniture statement answers every caravan or motorhome specification.
Where a manufacturer, converter or other responsible party specifies a standard, confirm it before ordering. Use the foam data sheets to check the stated performance of the selected product.
Common caravan foam mistakes
- Increasing thickness without checking furniture or bed-conversion clearances.
- Treating every cushion as the same shape.
- Choosing the firmest product simply because it is in a vehicle.
- Using a light padding grade that is not recommended for seating.
- Measuring only old compressed foam.
- Forgetting that several pieces may need to align in bed mode.
- Ignoring a weak locker lid or damaged base.
- Using standard upholstery foam where the cushion will remain wet.
A practical selection process
- Decide whether each piece is mainly a seat, backrest or bed-conversion component.
- Measure available depth without changing important clearances.
- Number and sketch every irregular cushion.
- Inspect the support base and storage lids.
- Shortlist only products suitable for seating where body weight is supported.
- Compare High-Firm and Reflex grades for supportive seating, with Medium considered where its stated use fits the project.
- Consider Severe Very Firm for genuinely shallow seating needing extra resistance.
- Check sheet dimensions and create a cutting plan.
- Inspect covers and zips.
- Confirm any project-specific fire requirement.
Caravan and motorhome seating works best when the foam is selected as part of the complete interior. The right grade is the one that fits the available depth, support base, cover and way the vehicle is actually used.
Quick answers about caravan seat foam
What foam should I use for caravan seat cushions?
Choose an upholstery grade stated as suitable for seating and compare it against cushion depth and preferred firmness. High-Firm and the Reflex grades are among the current All Foam seating options, while Severe Very Firm is relevant to some thinner seats needing extra firmness.
Is very firm foam always best for a motorhome seat?
No. Very firm foam is useful for specific shallow or high-resistance applications, but a deeper cushion or a user who prefers more give may suit another seating grade better.
Can the same cushions be used for sitting and sleeping?
Many layouts are designed that way, but the best sitting and sleeping feel are not always identical. Check how all pieces align in bed mode before changing thickness.
Should I copy the old foam dimensions?
Use the old insert as a reference, but also measure the furniture and cover. Old foam can compress, shrink or distort.
What if my cushion has an unusual shape?
Measure and sketch every side, angle and clipped corner. For complicated shapes or templates, contact All Foam before ordering so the cutting requirement can be assessed.
