(clockwise from top left) the ground floor was excavated and rigid insulation placed around the perimeter to cut thermal bridging here;
airtightness taping around joist ends; new roof rafters insulated with Icynene spray foam insulation; airtightness detailing to the roof, with Pro Clima Intello membrane under internal battening.
Tescon Profil
airtightness tape.
Intello Plus vapour control and airtightness membrane on underside of roof fully taped at all joints with Tescon Vana
airtightness tape and taped to Spanotech wall airtightness layer.
To minimise costs, Richard and I did most of
the airtightness taping ourselves.
Not exact matches
Roof: The main roof construction consists of fi bre cement slates on timber rafters, with 600 mm Rockwool insulation at ceiling level, a
taped plywood
airtightness barrier and services voids under, with a plasterboard finish.
(above, clockwise from top left) the walls of the eight units at Garville Drive were constructed from traditional concrete - block cavity - walls, with 100 mm of Xtratherm full - fill Cavitytherm board between the inner and outer leafs; Gyproc Airtite Quiet plaster behind 25 mm battens for the internal service cavity prior to installation of plasterboard, with
airtightness detailing of key junctions using Siga
tapes also visible; 150 mm Paratherm PIR insulation on the flat roof, part of a Moy extensive green roof system; a Kingspan Environmental rainwater harvesting system feeds garden garden taps at the development.
Though the building wasn't designed as a passive house, careful attention to
airtightness using Ampack's range of
tapes and membranes, with particular attention paid to key junctions such as windows, chased walls and a counterbattened service void in ceilings, leading to an impressive pressure test result of 0.48 ACH.
Airtightness comes primarily from the internal wet plaster finish, together with Ampack's suite of
tapes and membranes.
Walls: Kabe acrylic render system, followed inside by 200 mm Xtratherm platinum EPS 100 insulation, 200 mm Quinn Lite blocks (rendered internally for
airtightness with
taping at junction), battens & Gyproc plasterboard.
Client: Hastoe Housing Association Architect: Parsons & Whittley Contractor: EN Suiter & Sons Project manager: Aecom M&E designers: Engineering Services Consultancy Civil & structural engineering: Rossi Long Passive house certification: Mead Energy & Architectural Design Heating & ventilation system: Total Home Environment Electrical services: Alpha Electrical Windows: Munster Joinery Wall ties: Ancon Cavity closers: Cavalok Stainless steel fixings: Helifix Mineral wool insulation (cavity wall): Isover Mineral wool insulation (roof): Knauf XPS insulation (floor): Dow Plaster (for
airtightness) & wallboard: Gypsum Airtightness products: Pro Clima Airtight window tapes: Iso Chemie MVHR / heat
airtightness) & wallboard: Gypsum
Airtightness products: Pro Clima Airtight window tapes: Iso Chemie MVHR / heat
Airtightness products: Pro Clima Airtight window
tapes: Iso Chemie MVHR / heat pump: Genvex
1 The Rochestown House flats prior to the refurbishment; 2 aerated concrete blocks were chosen to form new build elements, including a new third storey that allows for more generous apartment sizes; 3 new triple - glazed windows were installed outside the masonry layer so that the external insulation could wrap around them, and help prevent thermal bridging; 4 the
airtightness layer was moved to the outside of the structure by
taping the joints of the existing concrete panels, then extending that
tape up onto the aerated blocks in the new floor; 5 Aerobord platinum EPS external insulation being fitted to the original concrete panel walls; 6 & 7 the new window frames visible here in the external insulation layer, including Rockwool fire breaks; 8 openings for exhaust and supply intakes for the new Zehnder heat recovery ventilation system, seen here prior to being insulated and airtightened; 9 installation of the Bauder bitumen roofing membrane.
The team insulated the entire building envelope with EPS, and
airtightness is provided by the OSB along with Siga
tapes and membranes.