Strongbond 250 Sand

Traditional Pour and Roll Underlay or Cap Sheet

Chesterfelt Strongbond 250 Sand is a traditional pour and roll membrane which can be used as both an underlay and a capping sheet. It features a polyester core which is saturated and coated in high quality bitumen and has a sanded finish.

When incorporated in a suitably designed and installed multi-layer system, maintained in accordance with BS 8217:2005 – Reinforced bitumen membranes for roofing, Strongbond 250 Sand may be expected to last in excess of 10 years.

Key Features & Benefits:

• High performance

• Durable

• Sand finish


Strongbond 250 Sand

Accreditations and Certifications

Product Information
Product CodeRoll LengthRoll WidthPallet Quantity
P56320m1m25 rolls


To complete a full system, Chesterfelt Strongbond 250 Sand can be used as an underlay membrane, or alternatively it can be fitted above the existing underlay membrane and used as the final waterproofing layer. When used as part of a multi-layer built up roofing system, it provides reliable waterproofing protection and is suitable for use on a wide range of buildings.

Installation Guidelines

This product should be installed in accordance with manufacturer recommendations and all relevant national standards and codes of practice, including BS 8217:2005 – the code of practice for reinforced bitumen membranes
for roofing.

Mineral Surface Protection

The upper surface of the membrane is protected using mineral granules, which are sourced from natural quarrying. The colours of the minerals therefore can sometimes vary depending on seam depths and extraction positions within the quarry. However, after the effects of the weathering and ageing, any variations will become less visible.

Maintenance and Repair

Routine inspection, cleaning and maintenance of the roof membranes should be based on the recommendation in BS 8217:2005. Should it be damaged either during construction or at later date, then the repairs should be made using the same materials so that the performance of the built-up membranes is retained.


Manufactured in accordance with BS EN 13707:2004+A2:2009 – Flexible sheets for waterproofing. Reinforced bitumen sheets for roof waterproofing.

Handling and Storage

The material should be stored vertically on a firm flat surface, and transported stood on end to avoid damage.

Health and Safety

Health and Safety should be observed at all times in accordance with HSE and industry guidance. Specific Risk Assessments and Method Statements should be produced by contractors where necessary to ensure Working at Heights, Fire Safety and Manual Handling rules are compliant with current law and regulations. Health and safety data sheets are available for all materials on request from Chesterfelt.


UKCA certified & CE Marked to EN 13707:2004+A2:2009.
CE Certificate Number: 0086-CPR-595938.
UKCA Certificate Number: 0086 CPR 753192.

Quality Assurance

Chesterfelt Strongbond 250 Sand is manufactured in accordance with BS EN ISO 9001:2015 – Quality Management Systems (QMS)..

Associated Products

Strongbond 250 Green.

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