External timber framed walls


Sheathing shall be durable and capable of providing structural resistance to racking

The following materials are acceptable:

PlywoodBS EN 636 and BS EN 13986 Table 7
Oriented strand boardBS EN 300 type OSB/3 or 4
Moisture-resistant chipboardBS EN 312 type P5 or P7
Medium boardBS EN 622-3 type MBH.HLS1 or MBH.HLS2
Impregnated soft boardBS EN 622-4 type SB.HLS
Proprietary sheathing materialsTechnical Requirement R3 and used in accordance with the assessment.