Celotex PL4050 50mm

Celotex PL4050 50mm

Technical Information
Size 2400mm*1200mm
Thickness 50mm + 12.5mm plasterboard
Width 1.2m
Category Celotex PL4000 Insulated Plasterboard
Product Name Size Unit Price Qty. Sub Total
 Celotex PL4025 25mm Insulation+12.5mm Plasterboard
2400mm x 1200mm £52.97 £0.00
 Celotex PL4040 40mm Insualtion+12.5mm Plasterboard
2400mm x 1200mm £62.66 £0.00
 Celotex PL4050 50mm Insualtion+12.5mm Plasterboard
2400mm x 1200mm £66.21 £0.00
 Celotex PL4060 60mm Insualtion+12.5mm Plasterboard
2400mm x 1200mm £79.90 £0.00
Dry wall Adhesive (25kg Bag)
25kg £11.80 £0.00
42mm Dry Wall Screws Box 1000
Box 1000 £16.21 £0.00
65mm Dry Wall Screws Box 500
Box 500 £16.21 £0.00
75mm Dry Wall Screws Box 500
Box 500 £16.52 £0.00
100mm Dry Wall Screws Box 500
Box 500 £42.10 £0.00
Delivered separately by courier.
Volume discounts apply automatically.

Product Summary

Celotex PL4000 is a high performance thermal insulation board where the PIR insulation is bonded to 12.5mm tapered edge plasterboard. Celotex PL 4000 Boards compare very favourably to Kingspan K17 and K18 boards ( see table below) See the Video for advice on installation . You can also consider The thermaline range but the celotex offer best value for money.

PL4000 i
s manufactured from rigid polyisocyanurate (PIR) using a blend of blowing agents that have zero ozone depletion potential (zero ODP) and low global warming potential (GWP).

With Celotex PL4000 you are specifying a multi purpose insulation board that:
  • Offers the user the ability to install both the insulation and plasterboard in one operation thus reducing installation times
  • Is suitable for both direct bonding (‘dot and dab’) and mechanically fixed installation techniques
  • Offers the installer maximum flexibility and installation speed due to the tapered edge plasterboard
  • Provides reliable long-term energy savings for buildings
  • Is suitable for both new build and refurbishment projects
  • Can be easily used to upgrade to current building regulation standards
  • Can be used in pitched roof, flat roof and wall applications
Suitable for use with all cavity masonry wall constructions and some solid walls and, as well as timber frame walls. The boards are handled and fixed as with standard plaster board methods.

Celotex PL4050 50mm

Product Application

Celotex PL 4000 Dry lining Boards, for Plaster Dab / Adhesive Bonding

Celotex PL 4000 Range Performance insulated PIR boards laminated to plasterboard

Internal dry–lining Celotex 4000 insulated plasterboard, is an insulated wallboard laminate ideal for use in plaster dab bonded dry–lining applications.


Premium performance rigid phenolic insulation –
Thermal conductivity 0.020 - 0.022 W/mK.
Insulation, dry-lining and vapour control in one board.
Negligible smoke obscuration.
Class O / low risk fire rating.
Little encroachment of room space.
Energy saving – allows quick response heating.

Kingspan Kooltherm K17 insulated plasterboard, is an insulated wallboard laminate ideal for use in plaster dab adhesive bonding dry–lining applications that provides insulation, dry-lining and vapour control in one board.

Celotex PL 4000 boards . Technical spec. Performance ( r value compared with K17)

What is surprising is that Celotex a cheaper board compares very favourably with Kingspan in terms of R value ( thermal resistance)

Product Code

Thickness mmCombined. R valueWeightKingspan K17 ComparedR Value
PL 402525+ 37.5mm1.15
PL404040+12.51.859.52K17 52.5mm1.80
PL404545+ 57.5mm2.20
PL405050+12.52.309.83K17 62.5mm2.40
PL406060+12.52.7510.01K17 72.5mm2.90
PL406565+12.53.0010.03K17 77.5mm3.00
R-Value = Thermal Resistance m2.K/w.


Cutting should be carried out either by using a fine toothed saw, or by scoring with a sharp knife, snapping the board over a straight edge and then cutting the facing on the other side.
Ensure accurate trimming to achieve close butting joints and continuity of insulation.

Installation Instructions