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Mayplas 517 Paper Faced and Flanged Rockwool Roll is designed for use in thermal and acoustic applications where good tear strength and fixing flanges are required, typically between studwork, rafters and ceiling joists. The paper facing forms a vapour check to BS EN 2972 and is usually placed on the warm side of the structure.

Consists of 10 kg/m³ density glass fibre roll faced and flanged on one side with bituminized kraft paper.


  • 80–180 mm thicknesses.
  • Vapour check to BS EN 2972.
  • Bituminized kraft paper facing.
  • To suit 400 or 600 mm centres.

General information

Uniclass 2015

Pr_25_57_06_53 Mineral wool insulationPrimary


P10/10 Loft insulation

P10/125 Insulation laid between ceiling ties/ joists

P10/135 Insulation laid across ceiling ties/ joists

P10/140 Insulation fitted between rafters

P10/15 Insulation fitted between rafters

P10/190 Insulation fitted between studs

P10/220 Sound insulation within timber framed separating wall

P10/240 Insulation fitted between floor joists

P10/250 Insulation supported between floor joists

P10/40 Insulation fitted between studs

P10/45 Insulation laid between floor joists

P10/50 Insulation supported between joists

Specification data - Mineral wool insulation

Product Reference

517 Paper Faced and Flanged Rockwool Roll


80 mm

100 mm

120 mm

150 mm

160 mm

180 mm

Product Options

Kraft paper facing:

  • 90 g/m² bitumen kraft.
  • Vapour check to BS EN 2972.

Vapour check to BS EN 2972.

10 kg/m³.

Thermal resistance (R-value):

  • 80 mm: 2.00 W/m²K.
  • 100 mm: 2.50 W/m²K.
  • 120 mm: 3.00 W/m²K.
  • 150 mm: 3.75 W/m²K.
  • 160 mm: 4.00 W/m²K.
  • 180 mm: 4.50 W/m²K.

Reaction to fire:

A1 as defined in BS EN 13501-1.

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