Plas Mawr, Conwy

At the heart of Medieval Conwy stands Plas Mawr, the "Great Hall", built between 1576 and 1585 for the Welsh merchant, Robert Wynn. This richly decorated building is an architectural gem, possibly the best preserved Elizabethan townhouse in Great Britain. It dominates the town of Conwy with its gatehouse, stepped gables and lookout tower. This "worthy plentiful house" is especially noted for the quality and quantity of its ornamental plasterwork, now fully restored to its original splendour.

The results of the tests carried out by Burnaby were of the highest standard"…………"Burnaby were appointed for the contract which was successfully completed to the same high standard (as the tests)".

Building Design Partnership, Manchester

Works carried out

The external walls are constructed from Silurian gritstone rubble, which were heavily carbonated and had an extremely friable surface.

Cleaning was intended to remove the carbonation but not damage the friable stone.

After results of tests carried out by ourselves we achieved removal of carbonation and accumulated dirt, but leaving the stone beneath intact and also de-lamination flakes left in situ.

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