INSULATION

R4.0 'Pink Batts' fibreglass wool  insulation is placed between the roof framing throughout the house, with straps stapled to the timber framing to secure the blankets in place.strapped into position. Once this layer of insulation is installed, a layer of 'Intello' is fixed and taped to ensure airtightness.  Another layer of r2.2 Fibreglass Batts is installed to compensate for the steel structure to ensure there is no thermal bridging.

Once the insulation is installed the proclima 'Intello' membrane is continued and taped to create the continuous airtightness layer.

Gib Rondo batten system is a galvanised metal extrusion that is used for fixing between the timber framing (wall and ceiling in this house) and a second layer of R2.2 
insulation is added between the battens.

MEMBRANE ROOF

The roof for the garage at the street end of the PH is a flat roof that will incorporate an insulating layer laid beneath the roofing membrane.  The roofing membrame consists of a base-sheet layer of Nuraply 3PV-SA which is fixed over the insulation. This sheet is designed specifically for adhering to the insulation and provides a complete watertight layer once installed. A cap sheet of Nuraply 3P is welded onto the basesheet layer. The joints are welded to ensure a watertight solution. 


Laid to a fall for water drainage, the roof is timber framed with 'Ecoply' plywood laid over as a substrate for the roofing elements. The plywood is glue and screw fixed to the timber framing.

 

Once the 'Ecoply' substrate has been laid, 'IKO Enertherm' insulation panels are laid to which the 'Nuraply' roofing membrane is adhered.  IKO enertherm ALU is a 100 % CFC-free insulation board with a rigid polyisocyanurate foam core, faced with aluminium tri-laminate foil on both sides that has higher insulation values than most available insulation products.  The product is fixed with 'Ikofix' insulation fasteners as seen in the following pictures (blue) that are pressed through the insulation board.

 

Note the 45 degree chamfered beading to the corners formed at the intersections of surfaces e.g. wall to roof.  


The first layer of the 'Nuraply' double layer roofing membrane is continued up the abutting vertical surfaces, and turned down on the exterior edges at the bottom of the roof, where roof surface water will be discharged into fascia-mounted spouting.

 

The second layer of the 'Nuraply' roofing membrane is laid, with joins being heat sealed using a torched-on system.

On the downward fascia edge of the roof this picture shows the
upper layer sitting over the lower layer of membrane 

The top layer

The following pictures show how the membrane is dressed around the edge off the roof - to form upstands, downturns and seals at internal and external corners.  These are all areas that are prone to water ingress, so particular detail and application is imperative.

Rolls of the membrane stored on site.

Powdercoat finished aluminium capping flashings are fitted on top of the parapet walls above the garage roof.  Guides are nail fixed, and long lengths of flashing will be fitted over these, overlaid with lapped joins to allow for thermal movement of the metal.

METAL ROOF

The first section of roof has been laid to the rear section of the PH.  HI RIB trough-section roofing by Steel and Tube has been used, laid over building paper.  
Structural steel frames are installed for the roof structure of the front section of the PH.  
Attention has been paid to the management of the pro clima 'Intello' membranes, as can be seen in its placement in details around the building envelope.  This can be seen in the way it has been placed around the steel lintel-beam, and roof cross bracing connections.

While the roof is being built, concrete block walls are being erected, and wall framing continues on.  Refer to the Walls chapters of this blog for more pictures of these elements.

 

Roof trusses form the structure to the roof of the rear section of the house,
and boric treated Laserframe rafters have been used for the living area of the PH.

The Laserframe rafters extend out beyond the face of the building to form a generous eave,
that will provide solar shading.

Steel rod cross bracing is fixed to the structural steel work.
 INTELLO membrane is used between the connection and the steelwork.

INTELLO has been fitted between the roof brace connector and the external structural
element - which in this case,  is the steel frame.

The INTELLO membrane is detailed to be continuous.
This has been achieved on site by fitting strips as seen in this collection of photos.
These strips will be taped to the main membranes that will be
applied later in the construction process. 

Building paper from beneath the roofing will be managed
ready for the application of  Ecoply to be fixed to the wall.

The eave at the rear of the building.

The roofing profile, with black building paper protruding from beneath to move any
condensated moisture to flow to the spouting that will be affixed to the fascia board.

A roof window sits on the roof at the rear of the house. These views show it sitting on top of the roof, and also viewed from beneath  inside the house.

In the photo above, the building paper from the roof (viewed in the previous photo) 
is turned up behind the 'Ecoply Barrier' fixed to the outside of the framing.  
Refer to the 'Walls - Claddings' page for the functional and photographic 
information on 'Ecoply Barrier'.

The metal roof is complete, and the photovoltaic panels have been installed on top.  
They can be seen on the roof to the left of this photograph.