BIM ’69, The Integrated Team

Architectural Practice 1969

This is the cover of the June 1969 issue of BDP Preston in-house magazine ‘Contact’.

BDP was founded in Preston and pioneered a team-based, democratic approach to building design in the era of the mandatory fee scale. In this illustration entitled THE INTEGRATED TEAM the BDP ethos is affectionately satirised.

I believe the artist was Peter Jones, an architect in the BDP Preston office. Note the representation of the QS ‘CALCULUS ABACUS’ in what appears to be a dunce’s cap.

Valley roll


New stepped valley constructed in timber and according with best practice. Ready for lining.

With the tapered gutter, the pitched roof merges into the sole of the gutter without upstands. Thus, according to the fall of the gutter and the pitch of the roof, the gutter is wider at its highest point than at its lowest, the lower the pitch the more the gutter widens.*

Compare with…

*from Lead Sheet in Building published by the LDA 1978

When breathed upon or otherwise rendered moist


Two hundred year old roof, Lake District UK. Lead dowel used to fix slates to battens. It is more usual to find timber dowels or iron nails.


Westmorland slates reclaimed from the roof.

Slates are tested for quality by their thickness, clean smooth cleavage, toughness to allow of holing for nails, and resistance to water. A good slate partially immersed in water should not absorb water to any appreciable extent above the water line…It should also give a clear ring when struck with the knuckles and when breathed upon or otherwise rendered moist, should not emit a clayey odour.

From Architectural Building Construction Vol 2 by Jaggard & Drury, Cambridge University Press 1945

Uncovering a roof photoset