Who this guide is for
- Owners who have been shown a perforated ceiling or lining and have not yet seen a layout drawing
- Anyone specifying a surface where the pattern is expected to run continuously across a room
- People coordinating downlights, detectors, sprinklers and grilles into a patterned ceiling
- Readers who have found several reference pages and want to know what they share on site
- Anyone preparing questions for an acoustic professional before selecting a product
What these five surfaces actually share
A plain lining board can be cut anywhere and jointed anywhere, because nothing on its face has to line through. Every surface in this family has something on its face that does: a punched hole pattern, a routed slot, a strand texture, a weave direction, or a rhythm of hanging elements. That is the whole difference.
Because the face carries geometry, a cut lands somewhere within it. A board cut at a perimeter leaves part holes. A punched panel creases and cannot be dressed out. A woven mesh is tensioned between fixings rather than screwed like a board. A wood wool board exposes loose strands at every cut edge.
- Perforated gypsum board: pattern punched in the factory, plain margin supplied at some edges
- Punched metal: cut, folded and numbered to a set-out before delivery
- Wood wool board: the strand texture is the finish, and cut edges show it
- Woven mesh: a metal fabric tensioned on a frame someone has to design
- Baffles and rafts: individual hanging elements levelled across a field
The setting-out drawing is the decision
For all of these, the drawing rather than the order is the point at which the room is committed. It fixes where the joints fall, how wide the plain border at the wall is, which way the boards or panels run, and where the pattern is interrupted. Once boards are ordered to that drawing, the drawing is the building.
This pulls a decision that normally sits late in a project a long way forward. On a plain lining the layout is settled by whoever is boarding on the day. Here it has to be produced, reviewed and agreed by the client before anything is ordered, and the practical question is who in the team is producing it.
The layer behind the holes is part of the finish
An open surface is only open because something is meant to be reached through it. On perforated gypsum board that is a bonded fleece, a cavity and whatever has been specified within it. On a punched metal panel it is an absorbent layer that has to be installed and retained before the facing goes on, because it cannot be adjusted afterwards.
The same logic applies visually. The fleece behind perforated board is visible in raking light and its colour is part of the finished appearance. Behind an open weave the wall itself stays partly visible, along with any bracketry, services or lighting, so its colour and finish are a deliberate choice rather than whatever the wall happened to be.
Penetrations: does the light move, or does the pattern?
Every downlight, detector, sprinkler head, grille and access panel has to be placed relative to the pattern. There are only two answers, and they have to be chosen rather than discovered: either the penetrations are positioned to suit the pattern, or the pattern is cut to suit the penetrations wherever they happen to land.
Access is the version of this question that gets forgotten. A continuous perforated lining is a fixed surface, so reaching anything above it means cutting into it. Access panels therefore belong in the setting-out drawing alongside the lights, framed within the pattern rather than added afterwards where they look improvised.
Decoration and cleaning, decided before rather than after
On a perforated lining the holes must not be filled, which rules out the ordinary approach of skimming the whole face or rolling paint liberally across it. A single coat applied by a well-meaning decorator can close the route the board exists to provide. Whether any decoration is accepted at all is a statement the manufacturer makes about its own product.
Wood wool board behaves the same way for the same reason: painting on site closes the open face. Open weaves and punched ceilings collect dust in places a cloth cannot reach, and cleaning access in a high space is something to design rather than discover. Whoever receives the building at handover needs to be told all of this.
Offcuts, spares and the repair nobody plans for
Making good damage on a patterned surface means aligning a patch with the pattern in both directions, which is a different exercise from filling and sanding a plain board. Keeping offcuts and recording the board or panel reference is what makes a future repair possible at all, and it costs nothing at the time.
Colour and texture matching between production runs is the harder half. Felt and fabric facings vary between batches, wood wool shades differ, and a mesh drop is usually replaced whole rather than repaired. Ordering spares from the original delivery is the only reliable answer, and it has to be asked for while the order is still open.
Who decides what
The acoustic expectation belongs to a qualified acoustic professional working from the room. Fixings into a soffit, and the weight of anything hung from it, are matters for a structural engineer. Anything to do with fire classification or tested linings rests with the manufacturer's documentation and the relevant authority. The setting out belongs to the designer, and the client signs it.
Before a patterned surface is ordered
- 1Ask who is producing the setting-out drawing and when you will see it
- 2Establish where the joints fall and whether the pattern continues across them
- 3Confirm the width of the plain margin at walls and whether it is consistent
- 4Mark every downlight, detector, sprinkler and grille on the same drawing
- 5Decide whether penetrations move to suit the pattern or the reverse
- 6Locate every access panel needed above the lining before boarding starts
- 7Establish what sits in the cavity behind and who has specified it
- 8Confirm the colour of any fleece or backing visible through the openings
- 9Ask what decoration the manufacturer accepts on the finished face
- 10Ask how the surface is to be cleaned and whether access for that exists
- 11Order spares and keep offcuts from the same production run
- 12Record the product reference where the next owner will find it
Common mistakes to avoid
- Treating the layout as a site decision when the boards are made to it
- Ordering before the services layout is frozen, so the pattern is cut around late changes
- Letting a decorator paint a perforated face and close the openings it was chosen for
- Forgetting access above a continuous lining until something above it needs reaching
- Judging a pattern from a small sample rather than a full panel at the intended distance
- Specifying woven mesh as though it were a rigid panel and discovering the tensioning hardware late
- Leaving the wall or soffit behind an open surface untreated when it stays partly visible
When to involve a professional
- What any of these surfaces contributes acoustically is established by a qualified acoustic professional using the manufacturer's own measured data
- Point fixings into a soffit, and the weight of hanging elements, are structural questions determined by a qualified engineer
- Fire classification and tested lining arrangements rest with the manufacturer's documentation and the relevant authority
- The supporting frame or tensioning system for a woven mesh is designed rather than supplied, and that design belongs in someone's scope
- Interaction between hanging elements and detection, suppression or ventilation above them is settled by the responsible professionals
Frequently asked questions
Questions readers ask about this topic
Why can a perforated board not simply be cut to fit?
It can be cut, but every cut lands somewhere within the pattern, so a board cut for one position leaves part holes that read as untidy anywhere else. Plain board absorbs a room's irregularity in its jointing; a patterned board has to be set out on a drawing instead.
Does a perforated ceiling make a room quieter?
The perforation opens a path to whatever sits behind it, so any absorbent effect belongs to that whole build-up and to the room rather than to the board. What it would achieve in your room is a question for a qualified acoustic professional working from the manufacturer's test data.
What is the difference between woven mesh and perforated metal?
A punched panel is cut from solid sheet and stays rigid, so it is fixed like a board. A woven mesh is a metal fabric, flexible in at least one direction, tensioned or hung between fixings. Confusing the two means the wrong supporting hardware gets priced.
Can these surfaces be redecorated later?
Ordinary redecoration is usually what removes the reason they were specified, because filling or clogging an open face closes it. Whether any method is accepted is stated by the manufacturer for that product, and the person who will redecorate needs to be told at handover rather than left to guess.
How is damage to a patterned surface repaired?
A patch has to align with the pattern in both directions, which is far harder than filling plain board. Individual panels and hanging elements can usually be replaced, but matching colour and texture after a period of use depends on having kept spares from the original delivery.
Keep reading