GUIDELINE

Party walls

Part D Materials and Workmanship

Part F Ventilation

Acceptable Construction Details

Acceptable Construction Details Introduction Thermal Bridging and Airtightness

Insulation in Cavity

• Diagram H ACD - 30 Ope split Lintels Ste... • Diagram H ACD - 12 Concrete Intermediate... • Diagram H ACD - 39 Concrete Forward cill... • Diagram H ACD - 38 Concrete backward cil... • Diagram H ACD - 19 Eaves Unventilated At... • Diagram H ACD - 40 Eaves Wall head close... • Diagram H ACD - 29 Flat roof parapet - I... • Diagram H ACD - 9 Insulation below groun... • Diagram H ACD - 33 Prestressed Concrete ... • Diagram H ACD - 22 Eaves Insulation betw... • Diagram H ACD - 15 Timber separating flo... • Diagram H ACD - 17 Masonry Partition Wal... • Diagram H ACD - 18 Stud partition wall -... • Diagram H ACD - 7 Insulation above groun... • Diagram H ACD - 21 Eaves Insulation betw... • Diagram H ACD - 14 Timber Intermediate f... • Diagram H ACD - 27 Gable Insulation betw... • Diagram H ACD - 26 Gable Insulation betw... • Diagram H ACD - 11 Timber suspended grou... • Diagram H ACD - 23 Eaves Insulation betw... • Diagram H ACD - 32 Ope Perforated Steel ... • Diagram H ACD - 20 Eaves Ventilated Atti... • Diagram H ACD - 34 Ope Jamb with closer ... • Diagram H ACD - 29 Flat roof Eaves - Ins... • Diagram H ACD - 8 Insulation above grou... • Diagram H ACD - 13 Concrete Intermediate... • Diagram H ACD - 28 Gable Insulation betw... • Diagram H ACD - 35 Ope Jamb with proprie... • Diagram H ACD - 36 Corner Inverted Corne... • Diagram H ACD - 16 Masonry solid and cav... • Diagram H ACD - 25 Eaves Insulation betw... • Diagram H ACD - 10 Insulation below grou... • Diagram H ACD - 37 Galvanised Top steel ...

Irish Water Requirements for Dwellings

Typical Inspection Reports

No 2. Inspection Foundations Radon Sump Barrier and Blinding No 26 Inspection of Windows on Rainwater System No 11. Inspection of Block work, Brickwork and feature stone band No 2. Inspection Foundations Radon Sump Barrier and Blinding No 12. Inspection of Block work, gable and party walls. No 28. Inspection of timber stairs installation No 3. Inspection Radon Barrier Blinding and Insulation No 22 Inspection Steel Beams and Intumescent paint No 4. Inspection of Radon Barrier and DPC No 25 Inspection of Windows on Front Elevations, DPM and Control Joint No 5. Inspection Radon Barrier Rising Walls Block and Brickwork No 17. Inspection of Stud wall construction No 8. Inspection of Blockwork and elements No 14 Inspection of Structural Beams No 23 Inspection of windows and doors being installed No 21 Inspection of Electrical first fix No 19. Inspection of Roof Construction and breathable membrane No 27 Inspection of Windows on Velux Rooflights No 10. Inspection of Joisting , bridging, Block work, Brickwork and Lintel supports No 16. Inspection of Stud wall construction. No 7. Inspection of Rising walls, Damp proof Course and Blockwork. No 18. Inspection of Roof Construction. No 7. Inspection of Chasing Block work, Brickwork and feature stone band No 6. Inspection Rising Walls Block and Brickwork No 8. Inspection of Radon Barrier and Damp proof Course. No 30 Inspection of timber stairs handrail installation No 15. Inspection of Stud wall and floor joist construction No 29. Inspection of timber stairs and handrail during construction stages No 3. Inspection Radon Barrier Blinding and Insulation No 31. Inspection of Timber stairs handrail. No 32. Inspection of Roof Access Hatch No 24 Inspection of Windows on Front and Rear Elevations No 20. Inspection of chasing in block party walls for electrical first fix No 13. Inspection Brickwork and Firestopping No 9. Inspection of Brick and Block work from 1st to 2nd floor

Party walls

Share

Timber-frame party walls

Timber frame party walls are generally constructed of two independent wall frames positioned together; their function is to provide a protective barrier against the spread of sound and fire from one dwelling into the other.

The two party walls are to maintain a 220 mm minimum diameter and must always include a 40 mm min. cavity. It is important to note that no services are allowed to travel through the party wall cavity. As required by the building regulations, party walls require a minimum 1 hour fire rating. To achieve this in the timber frame, typically two or more layers of plasterboard are positioned between the two party walls to create the fire barrier. It is important that this fire barrier is not solely positioned between the wall but extended all the way up to roof level and that all cavity barriers and fire stops are correctly installed.

Conventional masonry walls and timber-frame construction

Conventional masonry walls can also be used as an alternative method for party wall construction in timber frame construction. Consideration must be taken at the design stage if this method is going to be used as it is the responsibility of the timber frame manufacturer to provide specifications and details of the wall construction and any alterations required to the timber frame.

Steps

Construction, weathering details, and cladding

Construction and weathering details should be provided for steps in the party wall by the timber frame manufacturer. The construction details must illustrate how the party walls will resist the spread of fire and weathering. Typically, the wall is protected against weathering by the cavity, breather membrane and the external cladding.

The external cladding can be:

  • Slates or tiles

  • A certified proprietary cladding system

  • Traditional timber cladding

  • Traditional render

Achieving weather and fire resistance

The timber frame manufacturer should provide construction and weathering details where steps in the party wall occur. The construction details must illustrate how resistance against weather and fire is to be achieved. A combination of an appropriate external cladding, ventilated cavity, breather membrane, and flashings at roof level generally provide the weather resistance.

Breather membrane should be lapped over the flashings. Roofing underlay should be carried up behind the flashings. Insect mesh should be used at the top and bottom of the cladding material and, where necessary, at openings to prevent insect infestation.

Shop Screws