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Newton NewSeal 420 Reservoir Green Roof Drainage Membrane - 0.97m x 50mNewton NewSeal 420 Reservoir Green Roof Drainage Membrane - 0.97m x 50m

Newton NewSeal 420 Reservoir Green Roof Drainage Membrane – 0.97m x 50m

Brand: Newton Waterproofing Systems
Product Code: M31
In Stock

Newton NewSeal 420 Reservoir is a unique drainage and water-retention membrane for use where a water reservoir is required for extensive green roofs of sedum, herbaceous plants, mosses or grass above decks and roofs.

£870.00 incl. VAT
£725.00 excl. VAT

Qty:

Extensive Green Roof Drainage Membrane. Newton NewSeal 420 Reservoir is a unique drainage and water-retention membrane for use where a water reservoir is required for extensive green roofs of sedum, herbaceous plants, mosses or grass above decks and roofs.

Unlike other products of this type, NewSeal 420 DeckDrain has a bonded geotextile that prevents intrusion of the soil into the water holding cups during back-fill and compression. This results in a permanently larger volume reservoir than any other 20mm-deep green roof membrane.

When the water holding cups are full, the large drainage holes within the HDPE core allow water to easily pass through to the drainage layer below to prevent saturation and waterlogging of the green roof above.

Key Benefits 

  • Unique bonded geotextile does not sag into the water holding cups as is the case with loose laid geotextile.
  • Large drainage holes allow a much higher drainage flow through the membrane than comparative products, ensuring that when the water holding cups are full, the water drains quickly so as not to waterlog the soil.
  • Suspended soil particles (fines) are filtered out by the geotextile layer.
  • Large drainage layer created by the 20mm HDPE core.
  • Tough and durable.
  • Quick and easy to install.

Typical Applications 

  • As a water holding and drainage layer above a deck, flat roof or pitched roof where shallow planting is used to create an extensive green roof.

Limitations: 

  • Should not be used as an intensive green roof membrane. Please use NewSeal 408 DeckDrain together with NewSeal 409 Root Barrier
  • Do not mechanically fix through drainage layers where waterproofing beneath can be punctured
  • Sufficient load above membrane is required to prevent wind lift. Please consult a specialist.
Features Result Units
Width 0.92 m
Length 50.00 m
Area 46 m2
Membrane height 21.2 mm
Density 720 g/m2
Packaged weight 70.00 kg
Service temperature -40 to +80 ºC
Installed Performance Result Units Test Method
Water-flow at 20 kPa – 1:80 slope – Upper layer 0.07 l/m/s EN ISO 12958
Water-flow at 100 kPa – 1:80 slope – Upper layer 0.04 l/m/s EN ISO 12958
Water-flow at 200 kPa – 1:80 slope – Upper layer 0.02 l/m/s EN ISO 12958
Compressive strength – Temporary loading >240 kPa ASTM D1621
Compressive strength – Permanent loading >120 kPa ASTM D1621
Water vapour diffusion resistance – Sd value >604 m BS EN 1931
Water vapour diffusion resistance – µ value >1208000 µ Calculated from Sd value
Water vapour diffusion resistance >3020 MNs/g Calculated from Sd value
CBR puncture resistance 2800.00 N EN ISO 12236
Tensile strength (Machine direction) 19 kN/m2 EN ISO 10319
Tensile strength (Cross direction) 10 kN/m2
Chemical resistance Excellent EN 14030
Oxidation resistance Excellent EN ISO 13438

Please see our our Delivery policy page for full details of our delivery terms and conditions, including information on exclusions, geographical restrictions, third parties, and failed deliveries.

1. Delivery Timescales

We will endeavour to deliver all orders within 1-3 working days (subject to geographical restrictions). Please note, where delivery lead-times for individual orders may be subject to change, we will keep you informed directly by phone or email within 24 hours of your order being placed.

Deliveries will not be made on UK bank holidays, and in such cases will fall on the next working day.

Standard delivery hours are between 8am and 6pm, Monday to Friday. If you are not available to accept the delivery when it is attempted, then a failed delivery charge will be applied (see the Delivery page for full details)

2. Delivery Fee Structure:

All orders, excluding those containing products covered in section 3 below, will be subject to the below delivery fee structure:

  1. Total order weight is between 0kg and 10kg = £7.99 standard delivery fee
  2. Total order weight is between 10kg and 20kg = £12.99 standard delivery fee
  3. Total order weight is between 20kg and 75kg = £20 standard delivery fee
  4. Total order weight is 75kg and above = £60 large order delivery fee
  5. Total order value exceeds £500 (regardless of weight) = Free delivery

3. Exclusions

The delivery fees detailed above apply to all orders, excluding:

  1. Orders containing insulation will be charged at £60 per pallet (10 units per pallet). Please get in touch with us directly for pricing and ordering.
  2. Orders containing protection boards: A large order delivery fee of £60 will be applied.
  3. Orders containing membranes of two metres wide and above: The delivery fee will be calculated as a price per unit*.
Code Description Weight (kg) Delivery Fee Per Unit
Multiple All membrane products with a width of two metres and above Varied £20
M3 Newton CDM 508 Mesh 29.26 £25
M2 Newton CDM 508 eco Floor 41.3 £30
M4 Newton CDM 520 eco Floor 37.62 £40

*Please note that, for orders containing membranes of two metres wide and above:

  1. Once the total order weight exceeds 75kg then the £60 large order fee will automatically be applied
  2. Once the total order value exceeds £500 then the free delivery policy will automatically be applied

4. Geographical Areas

The above delivery fees apply to all postcodes in mainland England, Wales and Scotland.

For deliveries to Ireland, Northern Ireland, the Channel Islands, the Scottish Isles, and any international orders please get in touch with the BaseTec team directly by email or phone for a custom delivery price. Standard delivery timescales do not apply to these areas and will be advised on request.

Additional charges, including customs fees, duties, or taxes may apply for international orders.

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