Newton® 601 Slimline Flooring Membrane

Newton® 601 Slimline Flooring Membrane

John Newton & Co. Ltd | Damp Proofing

Flooring Membranes Newton Slimline Membrane

Newton® 601 Slimline is a high-grade flooring membrane used primarily for isolating moisture-sensitive flooring from dampness in the floor slab. It can be used as the floor membrane as part of a Waterproof Cavity Drain System, when the survey has ascertained that there is no risk of water entering through the body of the slab.

Newton® 601 Slimline allows for the installation of sensitive flooring to be laid above ‘green’, still curing concrete as soon as the concrete is walkable, usually two days, significantly reducing project times.

With a loading capability of over 1000kN/m², Newton® 601 Slimline is able to resist very high compressive loading and is suitable for use as a high load DPC within structural block walls, especially when used to connect the wall and floor  membranes within the Cavity Drain System.

Newton® 601 Slimline is guaranteed against deterioration for 30 years and has a life expectancy of at least 50 years (DIN 9001:2000) Newton® 601 Slimline is inert and is highly resistant to water, alkalies, hydro-carbons, saline solutions and organic acids, and it is not affected by minerals. It is also resistant to bacteria, fungi and other small organisms.

Newton® 601 Slimline can be finished over with screed, 18mm or 22mm T&G chipboard or partical board. Laminate and timber flooring should be installed over a layer of 18mm or 22mm T&G chipboard.

Typical Applications:

  • To protect flooring from not yet cured slabs
  • Above contaminated floors
  • As a high grade DPM
  • As the damp proof floor membrane for use with Damp Proofing Wall Membranes (Newton® 803 Newtonite, Newton® 805 Newlath)
  • Can be used as the flooring membrane within a Basement Waterproofing specification if specified by a trained waterproofing surveyor

Newton® 601 Slimline has many benefits and features:

  • Can be installed above slabs that are not yet cured, and as soon as the concrete is walkable
  • Able to resist very high compressive loading, with capability of over 1000kN/m²
  • Can be installed as a high-load DPC within structural block walls
  • Inert and highly resistant to water, alkalies, hydrocarbons, saline solutions and organic acids
  • Not affected by minerals, and resistant to bacteria, fungi and other small organisms

Available in Roll sizes ranging from 20M² to 40M².

  • Brush the floor clean

  • Remove any sharp protrusions

  • Fill all non-structural cracks above 1mm wide

  • All structural cracks should be repaired or treated

  • Any holes or indentation should be filled with a suitable filler


  • The membrane is rolled out along the longest dimension of the floor with the grooved surface facing downwards. Subsequent lengths of membrane are rolled out and slightly overlapped and taped to form a continuous flooring membrane. 100mm of excess membrane is folded up to the walls to create an upturn so that all floor finishes are isolated from dampness to the walls.

  • Start with the flange (80mm flat section to one edge of the roll) at either one of the two longest walls

  • Roll out the first length of membrane and cut a length of membrane off the roll that is 200mm longer than the room length

  • Make a fold 100mm from the edge closest to the wall and lap to the long wall to form an upturn

  • Roll out consecutive further rolls so that the flange is overlapping the already laid membrane by 80mm.

  • Continue until the whole of the area to be treated is covered

  • Clean the flange and the top surface where the seal is to be made with a clean rag and cleaning alcohol. In cold and humid conditions a heat-gun may be required to carefully ‘burn’ off the surface moisture

  • Apply Newton Waterseal Tape (Or Platinum Waterseal Tape) to the underside of the flanged areas where they overlap the previous sheet of membrane. Leave the white backing tape in place

  • Align the lengths of membrane so they are perfectly parallel to each other. Use the lines on the membrane as a guide

  • Carefully remove the backing paper of the Waterseal Tape and at the same time press the top sheet into the bottom sheet to form the seal. Continue to the whole length and to all overlapping lengths of membrane

  • After the last length has been sealed to the subsequent lengths, cut the last length to size so that it fits the room space correctly, ensurig that a 100mm surplus is available for lapping up the wall as an upturn

  • Ensure the membrane is flat to the whole surface area and then create the last upturn to the second of the longer walls. Trim the upturn to 100m to all upturns

  • Fold the membrane to form the corners. This is done by folding the corner at 45 degrees and then folding this behind one of the upturns

  • Seal around protrusions with Platinum Mesh Tape or Newton Overtape

  • Lay flooring above


Technical Data
Membrane Material High Density Polypropylene (HDPP)
Stud Height Approx 1.0mm
Construction Height Approx 2.0mm
Unit Weight 0.470 kg/m²
Working Temperature -20°C to +80°C
Softening Temperature +148°C
Compressive Strength (SPF VN 2200) >1000 kPa
Compressive Strength - Permanent Loading (EN ISO 25619-1) 100 kPa
Thermal Conductivity (EN 12667) 0.48 W/mK
Water Vapour Diffusion Resistance -Sd Value (BS EN 1931) 200m
Water Vapour Diffusion Resistance - µ Value >400000 µ
Water Vapour Diffusion Resistance >1000 MNs/g
Resistance to Fire (BS EN 13501-1) Euroclass F
Chemical Resistance - Excellent (EN 1296 & EN 1928 B) 100%


Data Sheets

Technical Data Sheet

Installation Instructions

Declaration of Performance (DoP)

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£160.00 ex. VAT | £192.00 inc. VAT

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