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Celotex Insulated Plasterboard PL4000

(4 Products)

Celotex Insulated Plasterboard is a cutting-edge solution designed to enhance the thermal efficiency of buildings while providing the convenience of plasterboard finish. This innovative product combines insulation and plasterboard in one, making it an ideal choice for both new builds and renovations where improving energy efficiency and interior aesthetics are priorities. We recommend PL4000 for internal solid walls, pitched roofs, flat roofs, and timber frame linings. They are extremely energy efficient with a lambda value of 0.022 W/mK.

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What Is Celotex Insulated Plasterboard?

Celotex PL4000 is a specialised building product that combines polyisocyanurate (PIR) insulation with a 12.5mm standard tapered-edge plasterboard. This integration ensures that users can both insulate and dry line walls or ceilings in one step thus reducing installation times.

The Celotex insulation board offers excellent thermal performance, while the plasterboard provides a ready surface for decoration or further finishing. 

Such a composite product is particularly valuable in construction or renovation projects where both insulation and a smooth finish are needed. 

The use of Celotex PL4000 simplifies and speeds up these processes by providing a two-in-one solution.

Where Is Celotex Insulated Plasterboard Used? 

Celotex PL4000 is a multi-purpose thermal insulation board designed to provide thermal insulation and plasterboard benefits in one robust solution. 

You can install these boards, in internal walls or pitched roof systems below the rafters, with either dot-and-dab bonding or mechanical fit methods.

We recommend PL4000 products for internal solid walls, pitched roofs, flat roofs, and timber frame linings. You can install these boards under and between rafters and joists. 


PL400 Celotex Insulated Plasterboard Key Features:

  • Thermal conductivity of 0.022 W/mK
  • All-in-one alternative to buying single pieces of insulation and plasterboard
  • Tapered edge offers complete installation flexibility
  • Aluminium layer can act as a vapour control layer
  • Offers long-term energy-saving benefits
  • Works well for refurbishment and new build projects
  • Suitable for both direct bonding 'dot and dab' and mechanically-fixed installation techniques
  • Plasterboard is defined as Class O in accordance with the Building Regulations
  • Suitable for pitched roof, flat roof and wall applications
  • Can be utilised to upgrade to current building regulation standards
  • Reduces installation time
  • Manufactured from PIR with zero ODP and low global warming potential
  • They can be used for new build projects or refurbishment projects, which gives the installer maximum flexibility
  • BBA certified for use in plasterboard thermal laminate applications
  • BRE Green Guide Rating of A+ - assists in demonstrating environmental performance in BREEAM assessments


Installing Celotex Insulated Plasterboard

The tapered edge of Celotex insulated plasterboard allows it to fit seamlessly into a variety of different joists, frames, and rafters.

You can fit Celotex plasterboards with industry-wide, standard practices. Direct bonding dot and dab (also known as drylining) is one of the most popular ways of installing plasterboards.

You can install the plasterboard directly on top of a concrete or blockwork wall application. This process gains its name from the way that the plasterboard adhesive is pasted to the wall in even dots and dabs.

Some people use mechanically fixed installation techniques to secure insulated plasterboards to walls. More often than not, a galvanised mechanical anchor with a concave head can achieve your desired result. There are a range of different types of mechanical fixings that you can choose from. 

PL400 Celotex Insulated Plasterboard Thickness

When discussing Celotex insulated plasterboard thicknesses, it is important to understand that the thicknesses shown on our website refer to the overall thickness of the insulation and plasterboard bonded together.

All Celotex insulated plasterboards are made by bonding a Celotex PIR board to a sheet of 12.5mm plasterboard.

For example, the 52.5mm product in this range comprises a 40mm Celotex PIR Insulation board bonded to a 12.5mm Plasterboard sheet. This is why all Celotex insulated plasterboard thicknesses end in 2.5mm.

Like all other insulation products in our online shop, Celotex insulation backed plasterboards come in a range of thicknesses. Our customers can choose Celotex plasterboards that range from 37.5mm to 72.5mm in thickness. 

Different thicknesses are suited to different projects. By stocking a range of different thicknesses, we cater to every insulation need.

Frequently Asked Celotex Insulated Plasterboard Questions

Is Celotex Insulated Plasterboard Flammable?

Celotex PL4000 thermal insulation boards are a B on the Euroclass scale. This basically means that they contribute to a fire to a very limited extent, their smoke production is very limited and they do not produce flaming droplets.

Is Celotex Insulated Plasterboard Vapour-Resistant? 

Provided all joints between the products are sealed in accordance with manufacturer instructions, Celotex PL4000 boards can offer significant resistance to water vapour transmission.


How Should I Cut Celotex Insulated Plasterboards?

The two-in-one nature makes these boards far stronger, but more difficult to cut.

Whereas single Celotex insulation boards can be cut with a utility knife, you will need a saw to cut Celotex with plasterboard. You can use an ordinary saw, but we recommend using a saw with fine teeth for a clean, precise cut.

Always take the proper safety precautions when cutting insulation. We recommend cutting insulation in a clear, open space. You should always wear safety goggles and thick gloves.

For tailored advice, contact one of our customer service representatives through our live chat box or simply get in touch via email or by giving us a ring.

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