Wall underlay plays an important role in the weathertightness of exterior wall assemblies in light timber-framed residential buildings, yet often it is poorly installed. Getting it right can be as simple as 1, 2, 3.
Getting building basics right is critical for weathertight construction. Here, we look at the correct way to install wall underlay and flashing tape to exterior window and door openings in light timber or lightweight steel-framed dwellings before installing aluminium joinery.
The use of rigid wall underlays in residential construction has increased over recent years as more designers, builders and building owners recognise the advantages associated with their inclusion in exterior wall assemblies.
Under H1, recessed aluminium joinery systems offer enhanced thermal alignment with wall insulation, reducing thermal bridging and improving compliance with minimum construction R-values for energy-efficient building envelopes.
Greater understanding of how to incorporate air seals in openings and penetrations in the exterior envelope of a building is necessary to prevent wind-driven water from entering.
Following the 4Ds principles will ensure that construction is robust and durable and will manage any water that impacts upon the building or penetrates the exterior cladding.
It’s often said that the devil is in the detail. Here, we give a refresher on some small construction details that need to be correct to increase the weathertightness of your building projects.
