Next Day Free Delivery to London and Most of the UK

Next Day & Express Delivery

Available for most products when ordered before 2:00 PM.

Clever Shield trade prices with multi-buy discounts available on most products.

Bulk Discount

Trade prices with multi-buy discounts are available

Coating Applicators & Support  Experienced UK coating applicators for liquid coatings and industrial repairs. Qualified technical support Tel: 01268 472358

Orders & Technical Support

Lines Open: 8am - 5pm, Monday - Friday T: 01268 472358

Newtonite 803 Lath Mesh Membrane 20m2

Save £65.39 inc.VAT

Size: 1m x 20m
Sale price£134.60 inc.VAT Regular price£199.99 inc.VAT


Damp proof membrane, comprising of high density polyethylene membrane with a rot-proof polythene mesh that is 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 & dab plasterboard.


The Newton damp proofing membrane has gone through various name changes over the years, they most recently had two systems –

803 – Newtonite – this was a 3mm HDPE membrane, we also offered a non-meshed iteration of this in 2m x 20m

805 – Newlath – this was a 5mm HDPP membrane, this was a mix of 3mm and 5mm meshed membranes, the only difference was a technical performance in the plastic memory (HDPE vs HDPP)

Most recently they have now merged these two systems into a single brand – Newtonite Lath (meshed) and just Newtonite (non-meshed) which are all HDPE (no HDPP available any more)

So the performance characteristics are now all identical and they’re all made to 3mm thick.

Newtonite Lath – meshed membranes

1.0m x 10m - Product code M16

1.2m x 10m - Product code M9

1.0m x 20m - Product code M21

2.0m x 20m - Product code M22

Key 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.
  • Superb ‘key’ for renders or plasters.
  • No need to use injected damp-proof courses which unnecessarily pump chemicals into the property.
  • Quick and easy to install.
  • In many cases, the existing render can be left on the wall.
  • No requirement for damaging preparation to the wall surface.
Typical Applications
  • As a damp-proof base for renders, plasters or dot & dab plasterboard.
  • As a damp-proofing system to deal with rising damp.

Newtonite Lath Mesh Membrane is light, clean and easy to handle. It can be cut with a sharp knife, scissors or shears. The membrane is inert and is highly resistant to water, alkalies, saline solutions and organic acids, and it is not affected by minerals. It is also resistant to bacteria, fungi and other small organisms.

Newtonite Lath Mesh Membrane is guaranteed against deterioration for 30 years and has a life expectancy of at least 50 years.

Newton Waterproofing Systems was formed in 1848 and, as the first British company to produce a meshed membrane, we are now recognised as the leading supplier of damp proofing membranes in the UK. Newtonite Lath Mesh Membrane can be purchased directly from Newton or from leading builders merchants.

Technical Data
Installed Performance Result
Thickness at 100 kPa 2.64mm
Thermal conductivity 0.461 W/mK
Water vapour diffusion resistance – Sd value >604m
Resistance to fire Euroclass E
Chemical resistance – Excellent 100%
Oxidation resistance – Excellent 100% 

Product Data

Code: M9, M16, M21, & M22

Packaging: 1.2m x 10m, 1m x 10m, 1m x 20m, & 2m x 20m

Colour: White/Translucent

Area: 10, 20, & 40m²

Payment & Security

Payment methods

Apple Pay Google Pay Maestro Mastercard PayPal Shop Pay Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.


Clever Shield Coatings Safe Checkout Guaranteed

You may also be interested in

Trade Customer? 

Get all the benefits of being a trade customer by signing up for an account

  • Monthly Trade Discount Codes
  • Dedicated technical support team
  • Certified hands-on training courses

Recently viewed