Fibrous Plaster Ceiling vs Gypsum Board
What Each Is, How to Tell Them Apart & Repair (2026)

What fibrous plaster is

Plasterers call fibrous plaster “stick and rag”, which describes it well: plaster laid on a backing of fabric, traditionally canvas, stretched on timber. ClickBina's cornice guide describes the cast cornices used today as cast plaster with jute reinforcement. The fabric holds the plaster together, so a thin cast can span a gap or carry a deep profile without cracking apart.

Because it is cast in a mould, fibrous plaster is the natural choice for shapes: ornate cornices, ceiling roses, column casings and enriched panels. These are made in a workshop and then fixed in position on site, rather than formed on the ceiling.

What gypsum plasterboard is

Gypsum plasterboard, also called drywall, wallboard or simply “siling kapur” in many Malaysian quotes, is a flat factory board: a gypsum core between paper facings. Sheets are screwed to a metal or timber frame, and the joints are covered with tape and joint compound, then skimmed and painted so the ceiling reads as one smooth surface.

ClickBina's ceiling board price per sheet guide explains that “siling kapur” can mean either small boards in a visible grid or large jointed plasterboard sheets, and how each is bought and replaced.

Fibrous plaster and gypsum board side by side

Neither material likes water. Plain gypsum board softens and sags once it gets wet, and its paper facing can feed mould; ClickBina's BM guide to wet plaster ceilings notes that older non-gypsum plaster is a little more tolerant, but the rule is the same: fix the leak first.

How to tell which ceiling you have

• Look at a broken edge or an access hole: paper layers on both faces mean gypsum board; strands of fabric in the plaster point to fibrous plaster.
• Check for a grid: straight lines in a regular pattern usually mean small grid boards, not one jointed ceiling.
• Feel the weight: a loose fibrous piece is noticeably heavier than gypsum of a similar size.
• Look at the decoration: deep, crisp ornate cornices and roses are usually cast fibrous work.

Old ceiling boards should be checked before anyone cuts or sands them, because some older boards contain asbestos; the ceiling board price per sheet guide explains what to look for and why to test first.

Water, sagging and mould

A water stain on either ceiling is a symptom, not the problem. Find and fix the source first: a roof leak, a bathroom above, an aircon drain or a pipe. ClickBina's ceiling water stains guide walks through the usual causes.

Once dry, a small stain on sound board can be sealed and repainted. A board that has sagged, crumbled or grown mould is replaced, because wet gypsum does not regain its strength. Heavy fibrous pieces that have come loose need proper support before anyone works under them; ClickBina's guide to why ceilings fall explains how hangers and fixings fail.

Repair in kind or replace?

Matching an old ornate fibrous profile means taking a mould from a sound piece, which suits heritage or period homes where the detail matters. For an ordinary flat ceiling, a new gypsum ceiling on a proper frame is the usual answer, with a new cornice chosen to suit the room.

Fibrous cornices on a gypsum ceiling

Many homes now combine the two: a flat gypsum ceiling with a cast fibrous cornice or rose for the decoration. That gives a smooth, easy-to-repair ceiling plus the deep classical profile only casting can give. Deep ornate casts suit high ceilings and formal rooms; under a low ceiling they can look heavy. ClickBina's modern classic interior design guide shows how cornices fit a classic scheme, and the ceiling painting guide covers painting the cornice with the ceiling.

What it costs

These figures are published on ClickBina's guides (indicative 2026, Klang Valley):

Replacing an old fibrous ceiling usually means removal and disposal plus a new gypsum ceiling, so add the hacking rate to the new-ceiling rate when you compare quotes.

Which to choose for a renovation

• Flat ceilings, downlights, L-box or cove lighting: gypsum board on a frame.
• Classic cornices, roses and mouldings: cast fibrous plaster, sized to the ceiling height.
• Heritage or period home: repair fibrous work in kind where the detail is worth keeping.
• Wet areas: neither plain gypsum nor fibrous plaster; use moisture-resistant or cement board.

How ClickBina can help

We do plaster ceilings as part of renovation work: new framed gypsum ceilings, cornices, re-boarding sagging sections and replacing old ceilings. WhatsApp us your job details for a quote: your area, the property type and age, what kind of ceiling you think you have and what you want done.

ClickBina is an experienced KL & Selangor contractor for whole-house refurbishment and trade coordination. We reply within the hour, and the price we agree is a flat price with no hidden charges.

Sources & methodology

• Wikipedia, Plasterwork (section “Fibrous plaster”) — plaster on a fabric backing, shop-made and fixed in position.
• Wikipedia, Drywall — gypsum core with paper facings; paper and wet board support mould.
• ClickBina ceiling board, plaster cornice and wet plaster ceiling guides — jute-reinforced casts, board behaviour and every price here.

How we estimated prices: every RM figure on this page is quoted unchanged from the ClickBina guide named in the table; they are indicative Klang Valley ranges for 2026, not fixed rates.