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12mm Cembrit PB Permabase UNIPAN Cement Board A1

12mm Cembrit PB Permabase UNIPAN Cement Board A1
12mm Cembrit PB Permabase UNIPAN Cement Board A1
12mm Cembrit PB Permabase UNIPAN Cement Board A1
12mm Cembrit PB Permabase UNIPAN Cement Board A1
12mm Cembrit PB Permabase UNIPAN Cement Board A1
12mm Cembrit PB Permabase UNIPAN Cement Board A1
12mm Cembrit PB Permabase UNIPAN Cement Board A1
  • 12mm Cembrit PB Permabase UNIPAN Cement Board A1
  • External applications: rendering, brick slips or stone cladding
  • Tapered edges to facilitate invisible butt joint installation
  • Reinforced board with resistance to moisture and mould growth
  • A1 non-combustible reinforced, water-resistant fire rated cement board
Estimated delivery:
In Stock
£ 118.34
Ex VAT: £ 98.62
  • Brand: Cembrit
  • Model: 12mm Cembrit PB
  • Weight: 41.47kg
  • Dimensions: 2,400mm x 1,200mm x 12mm
  • SKU: 12mm PB
  • Product code: P1-2692
  • MPN: 12mm Cembrit PB

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12mm Cembrit PB Permabase (UNIPAN) Cement Board is a fibreglass-mesh reinforced, lightweight, water-resistant cement board with tapered edges, used on external applications, such as rendering, brick slips or stone cladding.

This rigid cement and aggregate based board incorporates polystyrene beads and is strengthened with glass mesh reinforcement in flat surfaces and in the tapered edges to facilitate invisible butt joint installation.

Cembrit PB Permabase UNIPAN is a dark grey flat surface board with grid texture indicating the presence of reinforcing fibre-mesh and tapered edges with lighter grey cement colour.

The UNIPAN or PB Permabase Cembrit is a highly-durable and stable reinforced base board with a great resistance to moisture and mould growth.

Cembrit PB Sheets are also suitable as backing boards in internal wet areas where ceramic tiles will be used as the decorative finish.

Boards are easy to lift and work, unlike other cementitious or calcium silicate boards with no specialist blades or fixings required.

Permabase (UNIPAN) Boards can be cut easily by scribing and breaking, cut edges are generally clean and do not require sanding.

Cembrit PB has been tested and approved in a variety of assemblies for both 1 hour and 2 hour fire rated walls.

This stable, crack free cement base Cembrit PB boards are popular for external decorative rendering, brick slips or stone slip cladding.

Cembrit PB UNIPAN can also be used as an element within internal fire rated partition walls and ceilings.

No need for mechanical cutting tools, or dust extraction equipment.

Can be nailed or screw fixed close to reinforced tapered edges.

Can be used in fire-rated internal wall partition assemblies.




Thickness: 12mm

Width: 1200mm 

Length: 2400mm

Board Coverage: 2.88m2

Density: 1200kg/m3

Surface Front Face: flat glass fibre-mesh reinforced

Surface Back Face: flat glass fibre-mesh reinforced

Durability (Life Expectancy - Minimum): 30 years

Steel Frame Fixing: stainless steel or corrosion resistant 31mm to 47mm S12 type screws

Timber Frame Fixing: 37.5mm stainless steel or corrosion resistant screws (timber studs)

Fire Reaction: Class A12, Non-combustible


Cembrit PB Permabase (UNIPAN) Installation:

 · Fixing Cembrit PB to studwork at maximum 400mm centres.

 · Steelwork should be 20 gauge (or heavier) galvanized steel.

 · Stagger boards on successive courses.

 · Weatherproof membrane must be used on external applications to protect the sheathing board.

 · Fixings – Do not use conventional plasterboard, nails, jointing tape or jointing compound.

 · For timber studwork 37.5mm stainless steel or corrosion resistant screws or PB corrosion resistant 31mm to 47m S12 type screws for 20 gauge or heavier steel frames.

 · Tools – To avoid damaging mesh while screwing use a “dry wall” screw gun with a depth sensitive nosepiece e.g. Dewalt DW255.

 · Joints – Treat joints with latex-cement mortar or dry set(thin set) mortar.

 · Use mesh tape on all edges and cuts.

 · 50mm wide for internal applications, 100mm wide for external applications.

 · Fill joints in external applications with bonding material and immediately embed 100mm alkali resistant fiberglass mesh tape into bonding material.


You can order free Cembrit PB Permabase (UNIPAN) samples here.


*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet

Board covarage 2.88 m2
Density 1200kg/m3
Length 2400mm
Material Cement and aggregate based board
Profile Reinforced tapered edges
Size 12mm x 1200mm x 2400mm
Temperature resistance max. 105°C
Thickness 12mm
Water Vapour Resistivity 2.5 MNs/g
Weight/m2 14.40kg
Width 1200mm 
Bending Strength >5MPa
Fire Classification Class A1
Fire Reaction Non-combustible (A1)
Coverage 2.88m2 per board
Finish Flat glass fibre-mesh reinforced
pH Value 9 pH
Durability Minimum 30 years
Applications External applications: rendering, brick slips or stone cladding
Fixing method Stainless steel or Corrosion resistant screws
Features Reinforced A1 fire rated cement board
Manufacturer Cembrit PB® PermaBase UNIPAN

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We deliver insulation materials to Mainland UK only. Deliveries to Highlands, Northern Ireland, Isle of Wight etc.. might be possible at additional cost.
We offer free delivery on most of the orders above £300 (excluding VAT) (except special products - shipping cost via courier - products marked ''Request A Quote'')

Delivery of some insulation materials might be extended due to the current situation (Covid-19, stock shortages, allocations).
If you need materials quickly please contact us - we will do our best to help you source materials needed.

We do not deliver on weekends and bank holidays. Sometimes we can deliver on Saturdays - please check with us before placing the order.
If you need any further information please contact us tel. 02081910776

We can help to calculate price per m2 or linear meter (one meter in length) cost, please just contact us via phone 02081910776, email or live chat. Alternatively, you can work it out yourself quickly and easily: to get cost per meter square please divide price shown in orange area by ''Required area (m2)'' Example price of £28.80 divided by board coverage 2.88m2 = cost of £10.00 per m2.


No matter whether you choose a local installer or a national company, there’s a few tips to help you find the right installer for your home insulation improvements, such as asking for recommendations and making sure that they’re part of a certification scheme. This makes sure that they have the right skills and standards of workmanship to carry out the installation, and you can be sure that they know exactly what they are doing.


1. Thermal inspection picture in portfolio

It’s worth seeing a installer’s previous work. There’s no harm asking if you can see any properties nearby that they’ve installed insulation in. Best way would be to see Infrared Thermal Imaging Inspections. Thermal cameras spot small, but key changes in temperature in different areas of a house, identifying problematic areas that the human eye never could and some that a visual inspection could only hypothesize.

2. Reviews

Along with checking recommendations and previous work, finding reviews online can often be a great way to find out if they provide a good service or not. However, it’s best not to solely rely on reviews you may find or review websites, as there’s no controlling who writes them.

3. Compare prices

Comparing prices will also ensure companies can’t take advantage of you and give you a fair price. 

4. Word of Mouth

The best way to find a great insulation installer is through recommendations. Make sure you ask friends and family. They will most likely give you their honest opinion and can tell you from first hand experience.


Whether you require a wall, cladding, external wall, loft or floor insulation fitted, you can find and hire your local insulation installers from popular UK web pages. A simple internet search will return thousands of potential installers near your area.



We are the stockist of construction materials and related products for both trade and DIY from most recognizable brands in the UK like Cordek, RCM, Promat, Rockwool, Isover, Celotex, Xtratherm, Ursa, Low-E, Cedral, Kingspan, Dufaylite, British Gypsum, K-rend, Ecotherm, Iko enertherm, Kay-Metzeler, Terrawool to allow you to complete your insulation job on time at competitive prices and the highest standards.


Whether you are a large company or a DIYer, if you need a large amount of insulation materials, we can offer quantity discounts at the best prices. Please contact us and our friendly customer service will try to find the best and cheapest solutions for you. We value your time and we will try to deliver the products as soon as possible at a reasonable price to your construction site or house. The UK's leading insulation supplier near you and your needs. Price List available upon request.
12mm Cembrit PB Permabase UNIPAN Cement Board A1
12mm Cembrit PB Permabase UNIPAN Cement Board A1
£ 118.34