NBS Source
Newton 803 Newtonite


Can be used as a damp proof base for renders, plasters or dot and dab plasterboard and a damp proofing system to deal with rising damp.

Suitable for wall finishes including:

  • Plaster;
  • Render;
  • Hydraulic lime;
  • Plasterboard bonded to the membrane with a propriety adhesive compound.


A composite damp proofing membrane, comprising of a high density polyethylene membrane with a rot-proof polythene mesh heat-welded during the manufacturing process to the surface of one side. The meshed surface creates a mechanical key to allow the membrane to be plastered, rendered or to receive dot and dab plasterboard.

Light, clean and easy to handle, the product is 0.5 mm thick and has a pattern of raised 3 mm studs. The studs face the wall and create air channels that allow for vapour equalisation to take place between the membrane and the wall.

Newton 803 Newtonite is guaranteed against deterioration for 30 years, has a life expectancy of at least 50 years, and is supported by BBA Certification Certificate Number 94/3010.

Consult manufacturer's literature for relevant surface preparation information, for protection of the coating once applied and for recommended finishes.

Features and benefits:

  • Provides a surface that is totally separated and unaffected by the dampness within the wall, ensuring that the wall finish will never be affected by moisture or salts.
  • Provides a good ‘key’ for renders or plasters.
  • Does not require extensive and damaging preparation to the wall surface.
  • Can be cut with a sharp knife, scissors or shears.
  • No need to use injected damp proof courses which unnecessarily pump chemicals into the property.
  • Quick to install.
  • The membrane is inert and is highly resistant to water, alkalis, saline solutions and organic acids, and it is not affected by minerals. It is also resistant to bacteria, fungi and other small organisms.
  • Completely moisture-resistant, but allows vapour diffusion.
  • The existing render can, at times, be left on the wall.
  • Can be fitted horizontally or vertically.
  • Has a service life that can be equal to the design life of the structure.

General information






Meshed surface. 0.5 mm thick and has a pattern of raised 3 mm studs


Membrane form


1000 x 20 000 mm


30 years

Uniclass 2015

Pr_25_57_51_74 Rubber studded sheetsPrimary


J40/290 High density polyethylene/ polypropylene studded cavity drain membrane

J40/47 High density polyethylene/ polypropylene studded cavity drain membrane

Product range

Damp Proofing Systems

Specification data - Rubber studded sheets Enhanced data



Studded layer


Filter layer


Third-party certification

BBA certificate 94/3010.

Stud height

2.9 mm.

Sheet thickness

3.6 mm.

Weight (minimum)

500 g/m².



Integral plaster key

The meshed surface creates a mechanical key to allow the membrane to be plastered, rendered or to receive dot and dab plasterboard.

Performance characteristics


Fire performance

To BS EN 13501-1: Euroclass E.

Product Reference

Newton 803 Newtonite (M16)

1 x 10 m.

Newton 803 Newtonite (M21)

1 x 20 m.

Newton 803 Newtonite (M22)

2 x 20 m.



Vicat softening temperature


Packaged weight

6.2 / 11.34 / 24.6 kg.

Service temperature

-40 to +80°C.

Thickness at 100kPa

2.64 mm.

Compressive strength – Temporary loading

>320 kPa.

Compressive strength – Permanent loading

100 kPa.


0.461 W/mK.

Water vapour diffusion resistance – Sd value

>604 m.

Water vapour diffusion resistance – µ value

>1 208 000 μ.

Water vapour diffusion resistance

>3020 MNs/g.

Resistance to fire

Euroclass E.

Chemical resistance – Excellen


Oxidation resistance – Excellent



Newton 800 Mesh Plug.

Joint seal/ repairs

Newton Mesh Tape (A25).

Standard, for fixing to most surfaces.

Newton 800 Cob Plug.

For plywood or timber only.



Newton 800 Mastic (A18).

Stops any ‘bridge’ happening between the damp or stained surface and the new surface when holes are drilled through. Use also for sealing around protrusions.

Newton 800 Profile (A19).

2 m lengths. Plaster stop.

Environmental information



Third party certifications

BBA Agrément Certificate

BBA Agrément Certificate

British Board of Agrément (BBA) - certficate

Similar products from Newton Waterproofing Systems

Newton 410 GeoDrain

Newton 410 GeoDrain

Newton 503

Newton 503

Newton 508

Newton 508

Newton 520 eco

Newton 520 eco

Newton 601 Slimline

Newton 601 Slimline

Newton 603 (M19/ M23)

Newton 603 (M19/ M23)

Newton 803

Newton 803

Newton 805 Newlath

Newton 805 Newlath

Newton Condensation Strip

Newton Condensation Strip

Newton PAC-500 System

Newton PAC-500 System