Panelvent DWD Sheathing Board

Panelvent® DWD is used as a vapour permeable sheathing board in the timber frame building industry and can be used as an alternative to the more traditional boards. It is widely used where vapour open (breathable wall) construction has been specified. Panelvent® DWD is designed to be used on the outer face of insulated wall framing, behind a ventilated cavity, due to it’s high vapour permeability and strength. The manufacturer has recommend it’s use with OSB sheathing and/or a vapour check layer on the internal wall face, depending on the overall construction. The final wall make-up must be checked by a suitably qualified person to ensure there is no risk of interstitial condensation, in accordance with the design guidance set out in BS5250:2021 Management of Moisture in Buildings – Code of Practice. Reference should be made to EN ISO 13788 for the method of calculation or by reference to EN 15026.

It is recommended that Panelvent® DWD is used in conjunction with an appropriate breather membrane. An external breather membrane should always be used: in areas of severe exposure, on roofs, where rain screens or timber cladding are being used or where required by the NHBC or local authority. Cut joints, trimmed edges and penetrations as well as breather membrane overlaps should be taped with a suitable adhesive building tape. Panelvent® DWD sheathing boards have a natural wax additive and are able to withstand temporary site exposure, during the construction phase.

Panelvent® DWD is a structural MDF.RWH fibreboard manufactured in accordance with EN 622-5 and complies with European standard EN13986.
Panelvent® DWD has been developed to combine high racking strength and durability under service class 1 and 2 conditions to Eurocode 5 [EN 1195-1-1]

Environmental Advantages of Panelvent DWD

Panelvent® DWD is manufactured using woodchips from debarked coniferous softwood sourced from local sawmills and cultivated from sustainable forests. It is fully PEFC certified, complete with chain of custody through Panel Agency Ltd. Panelvent® DWD sheathing has a formaldehyde emission of less than 0.03ppm to comply with strict European directives. Panelvent® DWD is more vapour open than many types of sheathing materials currently in use throughout the construction industry. It therefore lends itself to be used in conjunction with suitable hygroscopic insulation materials to create “breathing wall construction.” Typically, the water vapour transmission resistance of plywood is 4.78 MNs/g whereas Panelvent® DWD is 0.72 MNs/g (wet cup test)