Insulated ceiling boards
Isoboard Ceiling Boards
Isoboard Ceiling Boards combine thermal insulation with a finished ceiling surface. Compare 30mm, 40mm, 50mm and 80mm options, check prices per m² and per board, and use the calculator to estimate whole-board quantities. Confirm your preferred finish and available lengths. Accessories, delivery and installation are quoted separately.
The comfort you feel.
01 / Find your fit
Choose your ceiling.
Select a thickness and length to compare the board cost.
per m²
— per whole board at the selected length
Select your thickness to see the available lengths.
Calculate your boardsBoard materials only. Clips, adhesive, trims, delivery and installation are quoted separately. Confirm finish and availability before ordering.
02 / Plan your project
A ceiling that adds up.
Turn your room measurements into a whole-board estimate.
One full-length board per row. The selected board must span the room in your chosen direction. Calculate separate rooms individually.
A quick coverage estimate. Confirm board lengths, cutting waste and joints before ordering.
Whole-board rounding is already included. Add spare boards only if your project needs them.
Your board estimate
Choose a thickness above, then enter your room dimensions.
Clips, adhesive, trims, delivery and installation excluded. Final quantities and availability are confirmed with your quotation.
03 / The details, side by side
Compare your options.
Start with thickness and price per m².
Then choose the length for your room.
| Option | Product R-value | Price / m² | Listed lengths (m) | Finish / availability |
|---|---|---|---|---|
| 30mm, 1.8m | R1.000 | R167,12 | Confirm lengths |
Product R-values are in m²·K/W; these are board values, not whole-roof system values. Board prices depend on the selected length. Confirm the final supply specification.
The Isoboard ceiling guide
Isoboard Ceiling Boards.
A finished ceiling.
A more comfortable room.
Choose the thickness. Plan the board direction. Understand the full material order before you buy.
Isoboard Ceiling Boards combine a visible ceiling surface with thermal insulation. Use this guide alongside the product selector to compare options, understand prices per square metre and turn your room measurements into a practical board estimate.
01 / Know what you are buying
A ceiling choice
with two jobs to do.
With Isoboard Ceiling Boards, appearance and insulation belong in the same conversation. Plan both before comparing your final quotation.
01
A visible ceiling surface
Isoboard Ceiling Boards form the ceiling you see from inside the room. Their layout, joints and finish therefore matter as much as the square metres on your order. Think about the direction of the lines, the position of lighting and how the ceiling meets the walls.
02
Thermal insulation
Isoboard is rigid, closed-cell extruded polystyrene, commonly called XPS. The product provides resistance to heat transfer. Compare the published product R-values for the thicknesses you are considering, then check how the selected board fits into your overall roof and ceiling specification.
03
An order in whole boards
When ordering Isoboard Ceiling Boards, the room area is the starting measurement, but a supplier must provide actual lengths and quantities. Two ceilings with the same area can need different orders because their shapes differ. Our calculator helps make that difference visible before you request a final quotation.
Start with the room,
then specify the board.
For Isoboard Ceiling Boards, record each room separately. Note the ceiling dimensions, whether the ceiling is flat or follows a slope, the planned board direction and any changes in level. A simple drawing with measurements is often more useful than a single total area.
Also decide whether you are replacing a ceiling, adding a new ceiling or discussing an overlay on an existing surface. These are different installation situations. The installer can then check the supports and finishing details before the material list is agreed.
This product page brings the buying information together. It helps you compare thicknesses and estimate boards, while the final quotation confirms exactly what will be supplied for your project.
02 / Choose the thermal specification
Four thicknesses.
One considered choice.
Compare Isoboard Ceiling Boards by product R-value, available lengths, finish and budget. A higher R-value means greater resistance to heat transfer through the board.
30 MM / SLIMMER OPTION
30mm Isoboard
R1.143
Published product thermal resistance · m²·K/W
Consider 30mm Isoboard where this thickness meets the project’s specification and available space. Begin with the required performance, then check the board length and finish that will be supplied.
Use the selector above for the current price per m². The cost of a complete board changes with its length, even when the square-metre rate stays the same.
40 MM / NEXT THERMAL STEP
40mm Isoboard
R1.524
Published product thermal resistance · m²·K/W
Compare 40mm Isoboard when reviewing a step up in board thermal resistance. Ask for the same room dimensions and finish across your quotations so the change in thickness is easy to assess.
Keep the quantity calculation tied to the length you will actually buy. A price comparison becomes useful when it includes the complete board order, rather than the headline rate alone.
50 MM / HIGHER BOARD RESISTANCE
50mm Isoboard
R1.905
Published product thermal resistance · m²·K/W
Include 50mm Isoboard when comparing a higher product R-value with the thinner options. Check your ceiling detail, board profile and the lengths offered before settling the order.
If you already have a specified thickness, match that specification first. If you are still planning, ask for the performance requirement to be checked before choosing solely on the material price.
80 MM / CONFIRM SUPPLY DETAILS
80mm Isoboard
R3.049
Published product thermal resistance · m²·K/W
Plan 80mm Isoboard with the supplier and installer before ordering. The manufacturer’s FAQ identifies square edges for this thickness; lengths, finish, minimum quantities and lead time need confirmation.
This thicker option deserves its own supply specification. Ask how the joints will be finished and confirm that the proposed board detail suits the ceiling you want to achieve.
Product R-values: Isoboard Nail-Up Thermally Insulated Ceilings brochure. Edge information: manufacturer FAQ. These are material values, not whole-roof system values.
Choose for the complete ceiling specification
Isoboard Ceiling Boards should be selected as part of the building’s overall thermal design. A thickness on its own does not establish compliance for every roof, climate or building. Have the required performance and proposed installation confirmed for your project.
03 / The ceiling you will see
Decide on the lines.
Then plan the room.
The surface finish of Isoboard Ceiling Boards influences how the completed ceiling looks. Confirm the exact finish against your selected thickness before ordering.
A
Bevelled appearance
A bevelled finish expresses the board joints as visible lines. Consider how these lines sit against windows, light fittings and the room’s longest wall. Ask to see the proposed profile so everyone is working towards the same appearance.
B
Isopine 100
The manufacturer describes Isopine 100 with grooves at 100mm centres. It gives a more closely spaced lined appearance. Discuss the direction of those lines and check the finish offered with the thickness and length on your quotation.
C
Isopine 200
Isopine 200 uses grooves at 200mm centres, giving a wider spacing. Compare a sample or clear product photograph before making your choice. Your quotation for Isoboard Ceiling Boards should state the finish alongside thickness, length and quantity.
Thickness and finish
are separate decisions.
When comparing 30mm Isoboard and 40mm Isoboard, keep the proposed finish consistent. Do the same when adding 50mm Isoboard to the comparison. If the finish changes as well as the thickness, the quotations may no longer describe the same ceiling appearance.
For 80mm Isoboard, obtain confirmation of the edge treatment and intended joint detail rather than assuming that every finish in the range is available. A drawing or sample approval is useful when the appearance of a thicker board is important to the project.
Isoboard Ceiling Boards have a white surface, and the manufacturer permits water-based finishing products. Agree the finish with your installer, including sample approval where needed. Record whether painting and cornices are included in the installation price.
Finish information: manufacturer product and finishes guide.
04 / Understand the price
Price per m².
Cost per board.
A clearer total.
Compare Isoboard Ceiling Boards using the same thickness, finish, board length and tax basis.
The selector above shows the current rate for your chosen option and calculates the cost of one complete board at the selected length. The room calculator then estimates the board materials needed for your measurements.
Isoboard Ceiling Boards are ordered in whole lengths. The purchased area can exceed the room area because the last board row may need trimming and the supplied length may be longer than the room.
01
Start with the rate per m²
For Isoboard Ceiling Boards, this is the common basis for comparing thickness prices. Check the tax wording beside the displayed price. Keep delivery and installation separate until you have confirmed what each quotation includes.
02
Convert it to one whole board
Multiply the supplied board length by its effective width, then multiply that area by the rate per m². For a 3.6m × 0.6m board, the area is 2.16m². Its board price is therefore 2.16 times the square-metre rate.
03
Price the complete material order
Multiply the number of whole boards by the price per board. Ask for clips, adhesive, trims, delivery and installation as separate quotation items. This makes the scope clear and helps avoid comparing a board-only price with a complete installed ceiling.
05 / From measurements to materials
Measure the room.
Choose the direction.
The calculator for Isoboard Ceiling Boards offers a room layout and a quick area estimate. Choose the method that matches the information you have.
One room, planned in rows
Enter the room length and width, then choose which dimension the boards will run along. Select a board long enough to span that dimension, or use the button to find the shortest listed length that will fit.
The calculator divides the dimension across the boards by their effective width and rounds up to a whole number of rows. It assumes one full-length board per row, with no reuse of offcuts. This is a useful starting order for a rectangular room.
For Isoboard Ceiling Boards, changing direction can change the board count, required length and amount of trimming. Compare both directions, then check the support arrangement and intended appearance with your installer.
A quick estimate by area
If you only know the ceiling area, choose the area method. The calculator divides that measurement by the coverage of the selected board and rounds up to whole boards. Add spare boards if your project requires them.
This method estimates coverage; it cannot decide where joints or cuts will fall. Before buying, replace the area estimate with a room-by-room layout wherever possible, particularly for irregular rooms or ceilings with several changes in direction.
Your estimate for Isoboard Ceiling Boards is ready to copy into an enquiry. Include the room drawing and delivery address so the final quotation can be checked against the actual job.
Worked quantity example
A 5.1m × 4.5m room
Assume 0.6m effective board width, boards running along the 5.1m dimension, and a confirmed 5.4m supply length. This example includes no spare boards.
| Measured room area | 22.95m² |
|---|---|
| Rows across the 4.5m width | 4.5 ÷ 0.6 = 7.5 → 8 boards |
| Coverage per supplied board | 5.4 × 0.6 = 3.24m² |
| Purchased board coverage | 8 × 3.24 = 25.92m² |
| Area above the room measurement | 2.97m² before any spare boards |
The same area can
produce a different order.
When pricing 30mm Isoboard or 40mm Isoboard for several rooms, keep the dimensions of each room on the enquiry. Combining everything into one area can hide a short board, a narrow final row or an awkward joint.
The same applies to 50mm Isoboard and 80mm Isoboard. A suitable thickness does not make every board length suitable. Check the list of available lengths for the specific option, particularly where supply is by special order.
For sloping Isoboard Ceiling Boards, use the measured ceiling surface rather than simply the room’s floor area. For L-shaped ceilings, divide the layout into clearly measured sections and ask the installer to review how they meet.
06 / Complete the specification
The details around
the boards matter.
A complete order for Isoboard Ceiling Boards includes decisions about supports, fixing, lighting, edges and access.
Agree on the installation method
The manufacturer’s nail-up guidance uses the specified adhesive together with mechanical fixing. Ask your installer to follow the appropriate current application detail and include the required accessories in the quotation.
For an overlay, have the condition and suitability of the existing ceiling checked first. Record who is responsible for preparation, removal of unsuitable material and making the surface ready. These tasks can affect both the programme and the installed cost.
Isoboard Ceiling Boards also need a planned edge finish. Mark cornices, access panels and any visible end joints on the room sketch so they can be allowed for before work starts.
Plan services and delivery
Agree the lighting and electrical layout with the installer and electrician. Follow the board and fitting manufacturers’ requirements for heat and clearances. Heavy fittings need appropriate support from the structure, rather than the board alone.
When arranging delivery of Isoboard Ceiling Boards, give the site address and explain the unloading access. Mention narrow passages, stairways, gates or storage restrictions that could affect long boards. Have a suitable protected storage area ready.
If sound control is part of the brief, request a separate acoustic specification. A thermal board selection by itself does not establish the sound performance of the complete ceiling.
A quotation that can be checked
List thickness, finish, board lengths and quantities; then list accessories, delivery and labour. For Isoboard Ceiling Boards, a clear supply schedule makes it easier to check the order on arrival and resolve any uncertainty before installation.
Installation reference: manufacturer nail-up ceiling guide. Confirm the application detail for your project.
07 / Before you order
Your Isoboard
questions, answered.
Use these answers to prepare a more complete enquiry for Isoboard Ceiling Boards.
What are Isoboard Ceiling Boards?
They are rigid XPS insulation boards used in suitable ceiling applications to provide a visible surface and thermal resistance. Choose the thickness and finish together with the proposed installation detail. The product selector and guide help you assemble the buying information; your installer checks the ceiling arrangement for the building.
How do I choose between the four thicknesses?
Compare 30mm Isoboard, 40mm Isoboard, 50mm Isoboard and 80mm Isoboard against the required thermal specification. Then check available lengths, finish, price and lead time. Avoid making the choice from price alone, or assuming that one thickness is automatically the right specification for every ceiling.
Are prices per board or per square metre?
The main rate is per m². Once you select a length, the page calculates the price of one whole board using that length and the effective width. The calculator total for Isoboard Ceiling Boards covers the estimated whole-board quantity. Accessories, delivery and installation are separate.
Why does the purchased area exceed my room area?
Boards are supplied in full lengths and widths. A final row may need trimming, and the supplied length may extend beyond your room measurement. Isoboard Ceiling Boards should therefore be ordered from a checked board layout. Simply multiplying the room area by a square-metre price may understate the board materials cost.
Can the calculator plan several rooms at once?
Use room mode separately for each rectangular room. Area mode can provide a quick combined coverage estimate, but it does not plan cuts or joints. Save the individual dimensions and preferred board directions with your enquiry. The final material schedule can then account for any practical reuse of suitable offcuts.
Does the same finish come in every thickness?
Confirm the finish of 30mm Isoboard, 40mm Isoboard and 50mm Isoboard when ordering. Give 80mm Isoboard its own specification because the manufacturer’s FAQ identifies square edges at this thickness. Ask for confirmation of the supplied profile and how the ceiling joints will be finished.
Does a thicker board change the quantity calculation?
Thickness affects thermal resistance and price. For Isoboard Ceiling Boards with the same effective width and length, the basic coverage calculation is unchanged. However, the lengths available for one thickness may differ from another. Recheck the selected length whenever you change the thickness.
What should I send with my quotation request?
Send your preferred thickness and finish, each room’s dimensions, the board direction and your delivery address. Copy the Isoboard Ceiling Boards estimate from the calculator and add a drawing or site photographs where useful. Say whether you need boards only, accessories as well, or an installation quotation.
Ready to plan the order?
A clearer specification.
A more useful quotation.
Choose your Isoboard Ceiling Boards, check the room layout and copy your estimate into an enquiry. Confirm the supply details before placing the order.