Cromar Protect 1F Non-Breathable Membrane 1m x 15m


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  • Product ID: TPF/15
  • Suitable For: pitched roofs
  • Area of use: EXT
  • Volume: 1m x 15m
  • Type: membrane
  • Colour: black
  • Brand: Cromar
  • Manufactuer: Cromar
  • Box Size: 1
Data Sheets

Download Tech Data

 

Cromar Protect 1F is a non-vapour-permeable (non-breather) membrane designed for use beneath slated and tiled pitched roofs, with specific suitability for roofs where bats are known to roost. This high-performance underlay complies with BS5250:2021 standards, requiring appropriate ventilation, and should be installed following BS5534:2018 guidelines. It acts as an effective secondary barrier, preventing dust, rain, and snow from entering the roof void and offering temporary protection for up to three months before the primary barrier (slates or tiles) is installed. Lightweight and easy to handle, the membrane comes in a convenient roll size of 45m x 1m, simplifying transportation and installation.

 

Key Points:

  1. Bat-Friendly Design: Tailored for roofs with bat roosts.
  2. Standards Compliance: Requires ventilation per BS5250:2021 and installation per BS5534:2018.
  3. Protective Function: Shields against dust, rain, and snow as a secondary barrier.
  4. Ease of Use: Lightweight material with a convenient roll size for handling and installation.

 

 

 

For more information on our range of membranes, please click here. Alternatively, for our full range from Cromar, click here.

For more information on Cromar, you can visit their website here.

 

 

Protect 1F U/Slating is a top-quality underlay designed for pitched roofs, requiring proper ventilation as per BS5250 2021 standards.

 

APPLICATION

  • Install Protect 1f underslating membrane following the guidelines outlined in BS5534:2018.
  • Installation is feasible under typical roofing conditions.
  • Begin laying the product horizontally across the rafters, starting from the eaves.
  • Lay Protect 1f up the roof slope, ensuring a maximum drape between rafters of 15mm.
  • If not counter battened, avoid pulling Protect 1F taut.
  • Adhere to the minimum laps specified in BS5534:2018.

 

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Elementlength
up to
1,5 m
up to
2,5 m
up to
3,5 m
up to
4,5 m
up to
2,5 m
up to
3,5 m
up to
4,5 m
Type of window frame material Minimum witdth of joints
for a butled mounting b in mm
Minimum witdth of joints
for a inner mounting b in mm
Hard PVC (white) 10 15 20 25 10 10 15
Hard PVC and PMMA (dark)
(colour extruded)
15 20 25 30 10 15 20
Hard PUR integral foam 10 10 15 20 10 10 15
Wood-aluminium-window 10 10 15 20 10 10 15
Aluminium-plastic sandwich
frame (bright)
10 10 15 20 10 10 15
Aluminium-plastic sandwich
frame (dark)
10 15 20 25 10 10 15
Wooden window frame 10 10 10 10 10 10 10

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