Links

The following pdf files are available for download:

Perkins and Perry TRA Certificate

Perkins & Perry TRADA member  2022 Certificate

Wolf Easi-Joist Certificate

PEFC Certificate

Certificate of Conformity of the Factory Production Control

Timber Frame CATG Certificate

easi-joist_tech_guide_4th_edition_nov_2010

stock timber sizes

Other links:

Building Regulations

Royal Institute of British Architects (RIBA)

Velux rooflights

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