Home > Companies > Necoflex > MonarTile Protect

Undertile lining featuring a synthetic material with a composite construction. The membrane is designed for use in ventilated warm and cold pitched roof situations and is used to reduce wind loads on slates and tiles to provide a secondary water‐shedding layer against wind driven rain or snow.

It has a twinply composition and is manufactured from a polyethylene upper layer with a polypropylene non‐woven spun bond under layer. Combines excellent tensile strength characteristics with high puncture and nail tear resistance. It is also are resistant to UV light degradation, but is not designed to be left exposed for long periods and must be covered as soon as possible.

Tested to BS EN 13859‐1.

Standard product features


1 x 15 m or 1 x 45 m rolls.


0.45 mm.


Matt black upper surface with black underside.

Technical properties:

  • Nail tear strength: 140 N (machine direction), 150 N (transverse direction).
  • Tensile strength: 150 N/ 50 mm (machine direction), 135 N/ 50 mm (transverse direction).
  • Water tightness: Class W1.
  • Water vapour resistance: 190 MNsg.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-65-50/325 Plastics sheets

Product specification

An important note about specifying





+353 18 023333

Product reference

MonarTile Protect


[Not required]
[Monarperm Monotape]

Manufacturer details

Unit 3,
Orion Business Campus,
North West Business Park,
Dublin 15
Tel +353 18 023333
Fax +353 18 036060
NBS Plus
Other content by this manufacturer:
Company Overview Products (26)