Close-R

Accessories

Close-R

Unilin Close-R fully insulated cavity closers are a cost effective solution for builders and specifiers for the closing of cavities around window and door openings, preventing cold bridging, damp penetration, air infiltration and condensation.

The Close-R range is used to close cavities and is suited to all types of windows and doors and is available in sizes to fit cavity widths from 100mm – 150mm, with checked detail to suit brick or drylined specifications and flanged detail to suit block outer facings. (Flanged detailing requires precise construction tolerances).

Benefits

Building Regulations

The recently revised Part L of the Irish Building Regulations places great emphasis on detailing at junctions. It has recognised the need to improve traditional junction performance as wall U-Values improve.

Targets for junction thermal performance are set in the BRE Paper IP1/06 and asks that a value of 0.05 be achieved. In the past where a typical wall U-Value was between 0.37 and 0.27, the 0.05 target was easily achieved using the traditional 25mm strip at the reveal. However when pushing the wall U-Values to ‘A or B’ rated values the junctions actually fail IP1/06.

Unilin Close-R has been independently tested to exceed the new standards.

Thermographic measurement – Best Practice with liner

It has been estimated that up to 30% of the heatloss in a well insulated house is through ‘Non Repeating Thermal Bridges’ at wall/floor junctions, corners, reveals, ceiling junctions heads and sills.

Appropriate detailing to ensure the “Continuity of insulation”is now asked for by Part L, and this continuity can be satisfied by following details provided by the Department of Housing, Local Government and Heritage in their publication ‘Acceptable Construction Details TGD Part L Building Regulations 2021- Introduction’ Using these details will allow the BER assessor to ascribe a good score to the detailing section within DEAP with a Y-value of 0.08, following the Enhanced Details using the Close-R system with insulated drylining may allow a Y-value of 0.04 to be used – a substantial improvement.

Installation Guidelines

If precise fitting of windows can not be guaranteed, a checked reveal using a vertical DPC should be used

Any jointing of Close-R should be facilitated within 150mm of the opening head. Close-R should be extending by 50mm past the sill closer.

When sills are horned into the facing outer leaf, the reveal Close-R should be trimmed around the concrete sill and extend 50mm into the cavity.

Horizontal DPCs should be used with the sill as normal, with a minimum lining of 40mm Polyiso placed at the back of the concrete sill.

Should clarification be required, contact Unilin Technical Support prior to installation.