RCD2 - Party wall between dwellings Registered Construction Detail

E18 Party wall between dwellings E18MCFF1

This is the vertical junction between the party wall and an external wall. One key area of good practice is the use of a fire stop at the compartment junctions, in this instance, it also needs to be fire-rated and have the same lambda value as the main cavity insulation. Again, it is important to ensure that the insulation tightly abuts the fire stop so that there are no gaps between. Party wall insulation needs to have a lambda value of at least 0.044W/mK but a density no greater than 40kg/m3 following the Party Wall Junction at Floor Level Detail.

Why is thermal bridging so important?

• Registered Construction Details can enable an otherwise failing building to pass with no alteration to insulation levels or use of triple glazing or expensive renewable technologies.
• Cost analysis shows savings of as much as £1,200 on a 90m2 unit through correct specification and attention to detail.

Talk to your architect, designer, or specifier about this, they can speak to the SAP assessor who can start designing out unnecessary costs. Find out more here.

About RCDs

Our Registered Construction Details provide free detailed drawings of thermal bridge junctions together with points to watch out for, specification, and thermal properties of the key materials. They contain everything that’s needed to get the job right.