62.5mm Celotex Insulated Plasterboard PL4050 (1200mm x 2400mm)

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62.5mm Insulated Plasterboard

Get the best prices on insulated plasterboards here! Celotex 62.5mm is a quality product made up of a polyisocyanurate (PIR) core with a foil lining on one side and a paper lining on the other. The foil lined side of the sheet is bonded to 12.5mm plasterboard. The plasterboard is made up of a Gyproc core with quality paper linings.

  • Celotex as a brand is renowned for its quality products and reliable services
  • Their high-quality products manufactured are virtually impossible to beat in price!
  • Celotex insulation has better thermal efficiency than many other materials
  • The Celotex brand offers materials to suit a wide range of applications including, pitched roofs, flat roofs, walls, floors, and ceilings.
  • Other Celotex product include Thermaclass, cavity wall boards, and insulation boards

Celotex 62.5mm Insulated Plasterboard

  • 62.5mm – Product code PL4050
  • 62.5mm Insulated Plasterboard is widely used product by builders, contractors and do-it-yourselfers within the construction industry and DIY industry.
  • The bonded Plasterboard has a tapered edge for an easier and more durable completion
  • This is a 2-in-1 product means you can improve thermal quality of the building and apply a wall finishing in one application
  • Insulated plasterboards are lightweight making them super easy to handle, cut, and install, this versatile product can be installed within domestic or non-domestic buildings
  • This product is a 12.5mm plasterboard and 50mm insulation board. This thicker sized board is a great way to prevent heat transfer.
  • This size is the most popular due to its practical size and level of thermal resistance, this 62.5mm is also cost effective.
  • This board offers an incredible thermal conductivity of just 0.022W/mK
  • The board has a thermal resistance of 0.022W/mK which for those who don’t know, means very small amount of heat can pass through the board, keeping the heat inside your home or office!
  • Whilst staying warm in the winter and cool in the summer, you’re also providing an energy efficient environment that contributes to the reduction of climate change
  • While you think it stops at helping the environment, with less heat escaping, Celotex insulated plasterboards can also save you money on your energy bills
  • These boards can be applied to walls and pitched roof applications in either a dot and dab or mechanical fixing application
  • The insulated plasterboards are also available in sizes 37.5mm, 52.5mm, 72.5mm, 77.5mm to suit every application need
  • All Insulated plasterboards are CFC, HCFC and Formaldehyde Free with zero ozone depletion potential (ODP) and low global warming potential (GWP)
  • Don’t be surprised if you see Insulated Plasterboard referred to as the following, Thermal laminate, Thermaline Boards, Insulation backed plasterboard, Thermal PIR Board, Warmline PIR.


  • Reaction to Fire: Euroclass B-s1
  • BS EN 13501-1
  • CE Marked (18.DOPPL4000-01) to BS EN 13950
  • BBA Approved (Cert no 16/5357)
  • Achieves a BRE Green Guide A+ rating
  • Quality Management Standard – ISO 9001:2015

How are insulation boards installed in wall applications?

Insulated plasterboard can be installed using the dot and dab method or by mechanically fixing the boards onto timber battens.
Please note this is a guide only. Always consult a building professional before insulation your domestic or non-domestic building. Installing the incorrect insulation materials or using an incorrect installation method can be a timely and costly mistake.

Dot and Dab method– Cut the boards to size making sure they are cut 15mm shorter than the top to bottom length of the wall and they are cut to fit around outlets and fixings. Mix and apply the required adhesive around the room to line with the board’s perimeter and centres. Take into consideration uneven walls and put less or more adhesive where required. Press the boards onto wall and pat into place using your hands to avoid damaging the boards. Use a spirit level to check the boards are even.

Mechanically Fixing method – Fix timber battens round the ceiling and floor level of the walls and horizontally around the room at 600mm centres. Be sure to cut around all openings and fixings such as windows and plug sockets. Fix the boards onto the battens making sure screws go through the boards and only halfway into the battens. Join the boards at the centre of the battens.

What is thermal conductivity and how does it work?

Thermal conductivity is the rate that heat is transferred by conduction through a particular section of a material. For example, if a material has a high level of thermal conductivity, that piece of materials has a good ability to receive energy and use it to conduct more energy. The energy is than spread through the material.

When the material has than conducted energy (heat) the lining of the material is designed to reflect the energy back into the building and prevent heat escaping. This is particularly seen in lofts where heat rises within a building and is reflected into the space. See for yourself the next time you use your loft space. Is it hot or cold?

How do you cut insulated plasterboard?

Protect gear such as gloves, masks, and goggles should be worn when cutting insulated plasterboards to prevent irritation caused by the material fibres.

The best and easiest way to cut insulated plasterboard is to measure and mark the board to size and then cut using a fine-toother saw. The boards can also be scored on insulation side, cutting through to the paper back of the plasterboard with a sharp knife, snapped over a hard edge and scored the other side.

Additional information

Dimensions2400 × 1200 mm




Material Type

Polyisocyanurate (PIR)

Pieces Per Pack


Sales Unit


Unit Coverage


Manufacturers Reference


Thermal Conductivity




Fire Rating

Euroclass B

Edge Type



Paper Facing

Weight (kg/m2)



2-3 Working Days

7 reviews for 62.5mm Celotex Insulated Plasterboard PL4050 (1200mm x 2400mm)

  1. Hunter

    Exceeded my expectations

  2. Miles

    Excellent choice

  3. Ian K

    Delivery was really smooth

  4. Krawers Builders

    Great delivery service with a call to confirm the day and friendly driver.

  5. Lawrance Myers

    Really happy with my order, really easy finish to a project I’ve been working on, would buy again!

  6. Roger Perry

    Good product, good quality, good price.

  7. Perry M

    Unbeatable prices, saved soo much money on this order! Will be back for the next one.

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