Quoins are large rectangular blocks of masonry or brick that are built into the corners of a wall. They can be used as a load-bearing feature to provide strength and weather protection, but also for aesthetic purposes to add detail and accentuate the outside corners of a building.
It is usual for quoins to be arranged in a toothed form, with alternate quoins projecting and receding from the corner. Where quoins are used purely for decorative reasons, a wide range of materials can be used such as timber, cement render, and stucco. They are often coloured to compliment the brickwork or render of the building.
There are a number of different types of quoin:
- Return quoin: The standard type, is built into wall corners with one long side over one short side.
- Reveal quoin: Built into the wall as a standard block, commonly used for door and window reveals.
- Chamfered quoin: This quoin has a chamfered edge on the top, bottom and outside edges for aesthetic purposes. This can also be incorporated on reveal, return or cladding-type quoins.
- Cladding quoin: This quoin is fixed onto the wall using a two-part resin after the corner has been finished. It is usually 50 mm thick. If the wall is to be rendered, the quoins are fixed first and then the render brought up to the chamfer.
 Related articles on Designing Buildings Wiki:
Featured articles and news
What is liquidation and how does it apply to contractors in the construction industry?
Scrutiny is placed on Carillion's controversial 2013 decision to extend subcontractor payment terms to 120 days.
RSHP unveil their involvement in a boundary crossing which will provide a new entry point into Hong Kong.
With PFI currently under the spotlight due to Carillion, this introductory article explains what they are.
Estimates suggest that up to 30,000 small firms could be at risk of non-payment as a result of Carillion's collapse.
Sir Oliver Letwin to lead an independent review into the delays in the delivery of housing.
As Carillion collapses, read our article explaining insolvency in the construction industry.
43,000 jobs at risk as Carillion declares insolvency..
1961 saw the publication of three important books about urban design that remain relevant today.
Next week the planning fee increases by 20% and new fees are introduced.
How the transformative power of BIM and other digital technologies can be used to gain a competitive edge.