Insulation Installation Guide

  1. Pitched Roof Over Rafter Insulation
  2. Insulation Between Rafters
  3. Insulation Between and Over Rafters
  4. Insulation Between and Under Rafters
  5. Insulation in the Ceiling
  6. Flat Roof Upgrades
  7. Basements

Roof Insulation Installation

1. Pitched Roof Over Rafter Insulation

  • Use Eurothane GP high performance insulation in pitched roof sarking applications to minimise insulation thickness and give the following benefits:
    Provides reliable long term energy savings for buildings
  • Low emissivity foil facers give improved thermal insulation performance within cavity air spaces
  • Eliminates thermal bridging
  • Single layer system
  • Ideal for new build or refurbishment projects
  • Air-tight construction method

Installation Guidelines

  • Note that specific fixing requirements should be determined for each roof, taking into account roof design and location.
  • Fix a treated timber stop batten equal in thickness to the insulation across the rafters at the eaves. Butt boards directly against this batten.
  • Install Eurothane insulation boards with the long side parallel to the rafter lines with both edges supported by rafters.
  • Cut the boards using the fine toothed saw. Cut to rake and splay at ridge and verges to ensure close butted joints.
  • Use large headed galvanised clout nails to fix boards in place temporarily until permanently secured by purlins.
  • Position your timber purlins over the insulation.
  • Calculate the length of the galvanised or stainless steel screw fixings required by adding together the counter batten depth, the insulation thickness and depth of penetration required to the rafter (usually 35mm).
  • Fix at each rafter along the purlin. Pre-drill pilot holes in the purlins to ensure ease of nailing and to reduce the possible splitting of the timber.
  • Drape and fix
    breather membrane over the purlins.

2. Insulation Between Rafters

Use Eurothane GP high performance insulation in between rafter applications to minimise insulation thickness and give the following benefits:

  • Provides reliable long term energy savings for buildings
  • Easy to line with plasterboard once installed
  • Dimensionally stable
  • No loss of internal headroom
  • Ideal for room in roof applications

Installation Guideline

  • Make sure there is enough rafter depth to accommodate not only the thickness of the Eurothane insulation, but also a minimum 25mm air space above the insulation.
  • Fix battens to the inside face of the rafters, to ensure that the air space is maintained
    * All details are to be in accordance with the membrane manufacturer’s details.
  • Measure the space to be filled between the inside face of the rafter prior to cutting the board.
  • Use the fine toothed saw to cut the boards at a slight angle, making the board width slightly oversized on one surface to achieve a ‘friction fit’.
  • Push the boards into the void between the rafters until they are tight up to the battens, ensuring that lateral joints are closely butted and taped.
  • Tightly fit the insulation to the ridge plate and carry over and tightly butt the wall plate at eaves.
  • A vapour control layer (VCL) should be installed to the underside of the rafters. A polythene sheet of higher vapour resistance is recommended for high humidity areas such as kitchens or bathrooms.
  • Complete the internal finish with plasterboard or other suitable sheet material.

3. Insulation Between and Over Rafters

Use Eurothane GP high performance insulation in pitched roof between and over rafter applications to minimise insulation thickness and give the following benefits:

  • Ideal for use where headroom is limited
  • Provides reliable long term energy savings for buildings
  • Creates a warm, habitable roof space
  • Suitable for new build and refurbishment projects
  • Minimised additional loading to the structure

Installation Guidelines

  • Note that specific fixing requirements should be determined for each roof, taking into account roof design and location.
  • Fix a treated timber stop batten equal in thickness to the insulation across the rafters at the eaves. Butt boards directly against this batten.
  • Install Eurothane insulation boards with the long side parallel to the rafter lines with both edges supported by rafters.
  • Cut the boards using the fine toothed saw. Cut to rake and splay at ridge and verges to ensure close butted joints.
  • Use large headed galvanised clout nails to fix boards in place temporarily until permanently secured by counter battens.
  • Position your timber purlins over the insulation.
  • Calculate the length of the galvanised or stainless steel screw fixings required by adding together the counter batten depth, the insulation thickness and depth of penetration required to the rafter (usually 35mm).
  • Fix at each rafter along the purlin. Pre-drill pilot holes in the purlins to ensure ease of screwing and to reduce the possible splitting of the timber.
  • Drape and fix breather membrane over the purlins.

Insulation Between The Rafters

  • Accurately measure the width to be filled between the inside face of the rafters, prior to cutting the board.
  • Use the fine toothed saw to cut the Eurothane board at a slight angle, making the board width slightly oversized on one surface to achieve a ‘friction fit’.
  • Push the board into the void between the rafters from the underside until it is tight against the bottom of the first layer of insulation.
  • To hold the boards in place, use battens along the side of the rafters.
  • Tightly fit the insulation to the ridge plate and carry over and tightly butt the wall plate at eaves.
  • A vapour control layer (VCL) should be installed to the underside of the rafters. A polythene sheet of higher vapour resistance is recommended for high humidity areas such as kitchens or bathrooms.
  • Finish with plasterboard or other suitable sheet material, fixed to the rafters.

4. Insulation Between and Under Rafters

Use Eurothane GP high performance insulation in pitched roof between and under rafter applications to minimise insulation thickness and give the following benefits:

  • Ideal for use with shallow rafters
  • Provides reliable long-term energy savings for buildings
  • Minimised additional loading to the structure
  • Dimensionally stable
  • Ideal for room in roof applications
  • Upgrade existing ceilings to current building code standards

Installation Guidelines

  • Make sure there is enough rafter depth to accommodate not only the thickness of the Eurothane insulation but also 25mm ventilated airspace above the boards.
  • Fix battens to the inside face of the rafter so that the bottom of the batten is 25mm below the breather membrane.
  • Measure the space to be filled between the inside face of the rafter prior to cutting the board.
  • Use the fine toothed saw to cut the boards at a slight angle, making the board width slightly oversized on one surface to achive a ‘friction fit’.
  • Push the boards into the void between the rafters until they are tight up to the battens, ensuring that lateral joints are closely butted.
  • Joints between boards must be tightly butted, taped and jointed using Eurothane tape and jointing material to create the vapour control layer
  • Secure Eurothane under joists with suitable mechanical fixings. Fixing details should be in accordance with the fixing manufacturer’s instructions.
  • Joints between the boards must be tightly butted, taped and jointed using Eurothane tape and jointing material to create the vapour control layer.
  • Complete the internal finish with platerboard or other suitable sheet material.

5. Insulation Over Joist In Ceiling

Use Eurothane GP high performance insulation in top up joist upgrades to deliver the following benefits:

  • Upgrade existing roof spaces to current Building Code compliance levels or above.
  • Provide energy efficient insulation measures without impacting on internal space
  • Insulating over joists provides a lightweight storage solution when insulation fixed into joists
  • Minimal load added to the structure due to lightweight boards

Installation Guidelines

  • Eurothane can be used to top up insulation levels in a horizontal ceiling when mineral wool exists between the joists
  • Ensure the ceiling void is ventilated and eave vents are left clear.
  • Ensure ceilings are strong enough to withstand loadings associated with installation.
  • To minimise air leakage and heat loss around the loft hatch, seal the edges with draught seals and mechanically fix Eurothane to the inside of the hatch.
  • Ensure existing insulation between joists is in good condition, with no signs of sagging.
  • Eurothane is laid directly over the joists as a continuous layer.
  • Eurothane should be laid in the same direction to that of the ceiling joists. Ensure boards are laid across a minimum of two joists.
  • Board joints are tightly butted together correctly supported by the joists.
  • Eurothane is mechanically fixed to the joists with suitable fixings.

For Light Storage Only

  • Lay 18mm of plywood over the Eurothane and secure into the ceiling joists with suitable fixings.

6. Flat Roof Upgrades

Insulation between and under joists.

Use Eurothane GP high performance insulation in flat roof between and under joist applications to minimise insulation thickness and give the following benefits:

  • A perfect solution to upgrade older buildings
  • Provides reliable long term energy savings for buildings
  • No need to remove existing weatherproofing covering
  • Ventilated cold roof construction
  • The ideal renovation/conversion solution
  • Helps to minimise any loss of internal headroom

Installation Guidelines

  • Make sure that there is enough joist depth to accommodate not only the thickness of the Eurothane insulation, but also a 25mm ventilated airspace above the boards.
  • Fix battens to the inside face of the joists so that the bottom of the batten is 25mm below the decking.
  • Measure the space to be filled between the inside face of the joists prior to cutting the board.
  • Push the boards into the void between the joists until they are tight up to the underside of stop battens, ensuring that the lateral joints are tightly butted.
  • Secure Eurothane under joists with suitable mechanical fixings. Fixing details should be in accordance with the fixing manufacturer’s instructions.
  • Joints between the boards must be tightly butted, taped and jointed using Eurothane tape and jointing material to create the vapour control layer.

When updating an existing ceiling, Eurothane GP can be fitted directly underneath the ceiling, as long as there is no vapour check layer such as floss paint or foil backed plasterboard. Always ensure that there is a 25mm minimum ventilation gap above any original insulation.

Ventilation must be provided above an insulated ceiling directly through the cold void. Failure to do so could result in serious condensation problems that may lead to decay and possible failure.

7. Basements

Eurothane GP high performance insulation in basement refurbishment projects to deliver the following benefits:

  • Create additional, highly thermal efficient living space
  • Provides reliable long term energy and cost savings

Basement Floors – Above Concrete Slab

  • The surface of the slab should be smooth, flat and free from projections. If required use a thin layer of sand blinding on a rough slab to ensure the insulation boards are continuously supported.
  • Ensure the basement floor is protected from external ground water penetrating the floor with a suitable waterproof system.
  • A minimum 500 gauge separating layer must be laid over the Eurothane boards to prevent a reaction between the wet screeds and foil facer, act as a VCL and prevent liquid screed migration between the board joints.
  • 25mm Eurothane board is positioned around the exposed perimeter as an upstand. It is usually the depth of the screed.
  • Apply a 65mm sand cement screed in accordance with manufacturer’s instructions.

Basement Walls

  • Ensure the basement wall is protected from external ground water penetrating the wall with a suitable waterproof system.
  • Following manufacturer guidelines to maintain waterproof seal, fix 25mm x 47mm battens to the masonry at 600mm vertical centres to coincide with the board edges with suitable fixings.
  • Secure Eurothane with suitable mechanical fixings. Fixing details should be in accordance with the fixing manufacturer’s instructions.
  • Joints between the boards should be tightly butted and finished by taping and jointing using appropriate tape and jointing material to create the VCL.
  • Cover with 13mm GIB board secured to battens with suitable fixing screws and/or PVA adhesive.
  1. Timber Frame Between Studs
  2. Timber Frame Internal Wall Lining
  3. Timber Frame Wall Sheathing With Brick Veneer Finish
  4. Timber Frame Exterior Wall Sheathing/Wrapping
  5. Masonry Partial Fill Cavity Walls
  6. Thermal Internal Wall Insulation Of Solid Brick, Block Or Concrete Wall

Wall Floor Internal Cavity, New Zealand

1. Timber Frame Between Studs

Use Eurothane GP insulation board in single timber frame wall lining applications to minimise insulation thickness and give the following benefits:

  • Deliver better R-Values and thinner solutions compared to many other insulation materials
  • Provides long-term energy savings for buildings

Installation guidelines

  • Make sure all studs and rails are flush, with no projections, and that services are correctly installed.
  • Insert insulation into framing between the studs and push back to building paper. Use the fine toothed saw to cut the boards to fit tightly between all studs and rails, making sure there are no gaps at wall abutments.
  • Ensure that the wall insulation is continuous with the floor perimeter insulation.
  • A vapour control layer (VCL) should be installed over the warm side of the studwork.

2. Insulation Between Rafters

Use Eurothane GP high performance insulation over internal timber frame wall lining to minimise insulation thickness and give the following benefits:

  • Offers the thinnest solution available
  • Provides reliable long term energy savings for buildings
  • Low emissivity foil facers give improved thermal insulation within cavity air spaces
  • Eliminates thermal bridging through studs and dwangs
  • Provides cavity for services

Installation guidelines

  • Make sure all studs and rails are flush, with no projections, and that services are correctly installed.
  • Fit services into cavity if required.
  • Use the fine toothed saw to cut the boards.
  • Fix insulation over framing using screws and plastic washers as per fixing manufactures instructions.
  • Insert insulation into framing and push back to building paper.
  • Ensure that the wall insulation is continuous with the floor perimeter insulation.
  • Tightly butt edges of boards together, making sure there are no gaps and fix back to solid timber, both at stud lines and at top and bottom rails.
  • Joints between the boards must be tightly butted, taped and jointed using appropriate tape and jointing material to create the vapour contral layer (VCL).
  • Vapour seal all perimeter abutments using sealant.
  • Seal around all penetraions for electrical outlets and switch boxes.
  • Fix plasterboard lining over the insulation using P.V.A glue and using plasterboard screws into studs.

3. Insulation Between and Over Rafters

Use Eurothane GP high performance insulation in timber frame wall sheathing applications to minimise insulation thickness and give the following benefits:

  • Eliminates thermal bridging of timber
  • Proved reliable long term energy savings for buildings
  • Low emissivity foil facers give improved thermal insulation performance within cavity air spaces
  • Sheathing encapsulates the timber frame
  • Voids between studs free for services

Installation guidelines

  • Make sure all studs and dwangs are flush (no projections).
  • Fix sheet of Eurothane GP to the external sheathing using galvanised clout nails at 400mm centres in the centre of the board and at 300mm centres around the perimeter.
  • Care must be taken to align the fixings with underlying studs, sole plates and head rails.
  • Tightly butt boards together and tape all joints.
  • Brickwork veneer should be tied back to the timber framing using helical stainless steel wall ties, driven through the Eurothane insulation into the studs.
  • Insert ties approximately 10mm to 20mm above the brick course so that a slight ‘crank’ can be applied. This ensures that the tie slopes downward from the sheathing to the outer brickwork.

4. Insulation Between and Under Rafters

Use Eurothane GP Insulation boards to wrap timber frame walls to minimise insulation thickness and give the following benefits:

  • Deliver better R-Values and thinner solutions compared to many other insulation materials.
  • Provides reliable long-term energy savings for buildings
  • Eliminates thermal bridging
  • Voids between frame free for services.

Installation guidelines

  • Make sure that all studs and dwangs are flush, with no projections, and that services are correctly installed.
  • Install Eurothane insulation over the studs. Secure Eurothane with suitable mechanical fixings. Fixing details should be in accordance with the fixing manufacturer’s instructions.
  • Tightly butt edges of boards together, making sure ther are no gaps and fixing manufacturers instructions
  • Use the fine toothed saw to cut the boards for infill panels, using off-cuts where possible, making sure there are no air gaps at wall abutments.
  • Install Eurothane insulation over the studs. Secure Eurothane with suitable mechanical fixings. Fixing details should be in accordance with the fixing manufacturer’s instructions.
  • Tightly butt edges of boards together, making sure there are no gaps and fix back to solid timber, both at stud lines and at top and bottom rails.
  • Joints between the boards must be tightly butted, taped and jointed using Recticel tape to create the vapour control layer (VCL).
  • Vapour seal all perimeter abutments using sealant.
  • Fix timber battens over Eurothane secured to timber studs with mechanical fixings.
  • Secure exterior cladding to timber battens as per manufactues instructions.

5. Insulation Over Joist In Ceiling

Eurothane GP Advantages:

  • Easy to fit between wall ties
  • Provides reliable long term energy savings for buildings
  • Low emissivity foil facers give improved thermal insulation within cavity air spaces
  • Super dimensional stability

Installation guidelines

  • Cut Eurothane insulation in to 1200x600mm pieces.
  • The wall ties used must be suitable incorporate a retaining clip to ensure should be the insulation is held in place. The insulation fitted against the inner leaf of the wall.
  • The first row of board-retaining wall ties should be installed at least one course below the damp proof course (DPC) and positioned at maximum 600mm centres horizontally, to provide a minimum support of two ties per 1200mm board.
  • The second and subsequent rows of ties should be installed at minimum 450mm centres vertically and maximum 900mm centres horizontally
  • Always ensure that each full or cut board is retained by no fewer than three ties around its perimeter.
  • Fit the boards between the wall ties, and secure in place with a retaining clip on eacht tie.
  • Ensure that horizontal and vertical joints are thightly butted to minimise heat loss.

6. Flat Roof Upgrades

Use Eurothane GP high performance insulation as a top-up upgrade to existing walls to deliver the following benefits:

  • Upgrade existing walls to current Building Code compliance levels (or above).
  • Suitable for multiple installation techniques.
  • Provide a vapour control layer when board joints are taped and jointed.
  • Provides reliable long term energy and cost savings.

Installation guidelines

Installation guidelines for internal lining sytems using direct bonding

  • Ensure that existing walls are permeable. Strip any gloss paint or vinyl wallpaper.
  • Use a fine toothed saw to cut the 1200mm x 2400mm Eurothane boards to fit the floor-to-ceiling height of the room.
  • Ensure a continuous seal at skirting, ceiling level and at openings by applying a continuous band of construction adhesive.
  • Apply further dabs of construction adhesive. This should be in accordance with the adhesive manufacturer’s instructions.
  • Align sheets and secure into correct position.
  • Once the boards are set, it is recommended that additional secondary mechanical fixings be applied to the Eurothane.
  • Joints between the boards must be tightly butted, taped and jointed using appropriate tape and jointing material to create the vapour control layer (VCL).
  • Please note that where existing walls are subject to the ingress of excessive moisture, it is recommended Eurothane be installed using mechanical fixings rather than a direct bonding technique.

Installation guidlines for internal lining systems using mechnanical fixings

  • Ensure that existing walls are permeable. Strip any gloss paint or vinyl wallpaper.
  • Use a fine toothed saw to cut the 1200mm x 2400mm Eurothane boards to it the floor-to-ceiling height of the room.
  • Secure Eurothane with suitable mechanical fixings.
  • Joints between the boards must be tightly butted, taped and jointed using appropriate tape and jointing material to create the VCL.

Installation guidelines for internal lining systems using mechanical fixings to timber battens

  • Ensure that existing walls are permeable. Strip any gloss paint or vinyl wallpaper.
  • Fix treated softwood timber battens to the wall. They should be set out a maximum of 600mm vertical centres and to coincide with the edges of the boards. As a minimum requirement, horizontal battens should be used to support the top and bottom of the board edges.
  • Secure Eurothane with suitable mechanical fixings.
  • Joints between the boards should be tightly butted and finished by taping and jointing using appropriate tape and jointing material to create the VCL.

Installation guidelines for internal lining systems using mechanical fixings to metal lining systems

  • Eurothane board can be fixed to a number of proprietary metal frame lining systems. The system should be fitted in accordance with the manufacturer’s instructions.
  1. Under Slab Installation
  2. Over Slab Installation
  3. Particle Board T&G Floating Floor
  4. Suspended Concrete Floors
  5. Suspended Timber Floors
  6. Exposed Floors
  7. Underfloor Heating

Wall Floor Internal Cavity, New Zealand

1. Under Slab Installation

  • Eurothane GP advantages it to minimises inulation thickness and give the following benefits:
    Easy-to-cut boards to fit in most paces
  • Provides reliable long term energy savings for buildings
  • Excellent dimenional stability
  • No thermal bridging at floor edges
  • Tightly butted joint for insulation continuity

Installation Guidelines

  • Level base and blind with sand.
  • Install damp proof membrane.
  • Use a fine saw to cut and fit insulation.
  • Tape all joins where boards abut. Cut and fit insulation upstand to slab edge. Height of upstand insulation to equal the required finished floor level.
  • Lay a polythene vapour control layer (VCL) over the insulation to minimise the risk of condensation forming at the insulation/slab interface and prevent migration of concrete between insulation boards.
  • Lay concrete to required finished floor level.

2. Over Slab Installation

Eurothane GP advantages it to minimises inulation thickness and give the following benefits:

  • Easy-to-cut boards to fit in most paces
  • Provides reliable long term energy avings for buildings
  • Excellent dimenional stability
  • No thermal briding at floor edges
  • Tightly butted joint for inulation continuity

Installation Guidelines

  • Install a damp proof membrane below the Eurothane. This can either be over the top of or below the slab.
  • Level the surface of the slab; it should be smooth and free of projections.
  • If required, use a thin layer of sand blinding on a rough, tamped slab to ensure that the insulation boards are continously supported.
  • Use A finetooth saw to cut the insulation and the upstand to the perimeter of the floor. The upstand depth should be the sum of the slab insulation and the screed thickness. The upstand thickness should not exceed the combined thickness of the wall plaster and the skirting board.
  • Lay the insulation board on the slab with all joints tightly butted.
  • A minimum 500 gauge membrane separating layer must be laid over the PIR boards to prevent a reaction between the wet screed and foil face, act as a VCL and prevent screed seeping between the board joints.
  • Lay a sand/cement screed over the Vapour Control Layer and insulation boards to a minimum thickness of 65mm.
  • Cover boards to prevent wheelbarrows and other traffic damaging the insulation.

3.Chipboard Floor Finish Floating Coat

A VCL should be laid over the Eurothane insulation boards and turned up at room perimeters, behind the skirting. It is recommended good practice that all joints should be lapped 150mm and taped. The chipboard must be minimum 18mm tongue and grooved flooring grade. Lay the chipboard with staggered joints, glued with a woodworking adhesive.

Provide a 10mm to 12mm gap at all perimeters to allow for expansion. This can be achieved by using temporary wedges. Where chipboard is butted together without a tongued and grooved joint, and all external doorways, a treated timber batten must be used in place of the insulation boards.

4. Suspended Concrete Floors

Use Eurothane GP high performance insulation with suspended concrete floors to minimise insulation thickness and give the following benefits:

  • Easy-to-cut boards to fit in most spaces
  • Provide reliable long termenergy savings for buildings
  • Excellent dimensional stability
  • Continuity with wall insulation
  • Tightly butted joints for insulation continuity

Installation Guidelines

  • If appropriate, install a damp proof membrane to the top surface of the suspended concrete floor.
  • Level the surface of the floor; it should be smooth and free of projections. Level with a thin layer of sand blinding to ensure that the insulation boards are continuously supported.
  • Use A finetooth saw to cut the insulation and the upstand to the perimeter of the floor. The upstand depth should be the sum of the slab insulation and the screed thickness. The upstand thickness should not exceed the combined thickness of the wall plaster and the skirting board.
  • Lay the insulation board on the slab with all joints tightly butted.
  • A minimum 500 gauge membrane separating layer must be laid over the PIR boards to prevent a reaction between the wet screed and foil face, act as a VCL and prevent screed seeping between the board joints.
  • Lay a sand/cement screed over the VCL and insulation boards to a minimum thickness of 65mm.

5. Suspended Timber Floors

Use Eurothane PIR high performance insulation in suspended timber floors to minimise insulation thickness and give the following benefits:

  • Quick and easy to install insulation between joists in one layer.
  • Minimise air leakage by friction fitting the insulation.
  • Provides reliable long-term energy savings for buildings.
  • Minimal load added to structure due to light weight boards.

Installation Guidelines

  • Install joists, with strut bracing as necessary.
  • Either fit the clips at one metre maximum centres along the edge of the insulation or fix battens to the sides of the joists to support the insulation.
  • Use the Eurothane Insulation Saw to cut the boards to achieve a tight fit, then push the boards firmly down between the joists. The insulation clip will ensure a fricton fit.
  • Insulate gaps between the joists and walls to prevent thermal bridging.
  • Install fiber board or softwood floor boarding directly onto the joists.
  • Ensure that the void below the insulation is ventilated.

6. Exposed Floors

  • For exposed or semi-exposed floors, it may be easier to insulate from below.
  • Fix Celotex insulationboards directly to the underside of the joists with galvanised clout nails at 400mm maximum centres.

7. Underfloor Heating

Use Eurothane PIR high performance insulation with underfloor heating applications to minimise insulation thickness and give the following benefits:

  • Minimal downward heat loss into the structure.
  • Easy-to-cut boards to fit in most spaces.
  • Pipe retaining clips may be inserted directly into the Eurothane insulation.
  • Provides reliable long-term energy savings for building structures.
  • Excellent dimensional stability.
Enquire Now