Icynene Insulation for this Windswept, Cumbrian Barn Conversion
The insulation of a 120-year old Cumbrian barn conversion proved a difficult challenge for this Father and Son farming partnership. Here, ECO Building News takes a look at a new technique in thermal insulation that’s gaining popularity in these difficult to treat projects.
On the exposed Furness peninsular in Cumbria, close to the Lake District Fells, there is precious little shelter from the fierce, westerly gales that batter this part of the Irish Sea coastline.
Technitherm® successfully insulates cavities in a building in a severe exposure area subject to flooding
Bank of Ireland
The bank is situated next to an industrial estate where the road in to the estate is one and a half metres above the ground level of the bank.
During the winter snow storms, the snow drifted against the side wall of the bank, and this was added to as more piles of snow from the roads being cleared were put against the side wall.
As the snow melted, the melt waters soaked through the outer brick leaf of the side wall and into the cavity. This was exacerbated by the wind driven rain against the wall and resulted in the cavity flooding and the water soaking through the inner leaf of the cavity, causing severe dampness on the inner walls of the bank.
The problem was to dry out the walls, find a flood resilient material which would also insulate the cavity to a high standard. There was also concern that the flooded cavity might have structurally weakened the wall.
To dry out the walls, some outer leaf bricks were removed from the side wall and rubble in the cavity was cleaned out to a depth of 300mm and the bricks were replaced.
Technitherm was then installed into the cavity as flood resilient cavity wall insulation. Being closed cell insulation Technitherm has been independently tested to prove its flood resilience, so Technitherm was able to prevent further ingress of water and solve any structural problems caused by the flood waters.
The walls of the Bank are now flood resilient, removing any further danger of dampness on the inner walls. Technitherm has also provided insulation values which match Building regulations and eliminated any structural problems caused by flooding.
Engineering pull‐test on Technitherm® injected cavity wall
The Test – Step 1
An unstable cavity wall was injected with Technitherm®. All the wall ties were isolated from the outer leaf, and then a chase cut through the bricks and mortar to the foam to create a 1m² free standing, brick panel.
The Test – Step 2
A sturdy steel frame was then added to the panel, and connected to a load cell. Once connected, the panel was subjected to increasing pull‐forces from the load cell, under the supervision of the specialist engineer in charge of the test.
At 1.818 tonnes/m², with no adhesion failure at all, the test was aborted to prevent any damage to the inner leaf. Technitherm® is, therefore, proven to provide a simple and highly effective solution to cavity wall failure, whilst insulating buildings to Building Regulation Standard BS 7457:1994 (BBA Cert No. 97/3426), with zero ozone depletion potential (ODP). A low GWP version is also available.
Technitherm: Homeowners in flood risk areas
Flood waters can penetrate cavity walls and cause major damage to the outer wall, the cavity wall ties, any fibrous insulation, the inner wall and decor. 3 million houses are at risk.
Technitherm®, a water resistant, closed cell cavity insulant:
- Prevents corrosion of wall ties
- Prevents insulation damage
- Replaces wall ties where they are already in disrepair
Technitherm® is shown to be the best performing type of cavity wall product according to a recent report on Flood Protection issued by DEFRA, DCLG and The Environment Agency. The report states that cavity wall insulation should be rigid closed cell materials, as these retain their physical integrity and have low moisture take up when exposed to flood waters.
www.planningportal.gov.uk/uploads/br/flood_performance.pdf (Table 6.2, p75)
A Traditionally Built Cottage
A traditionally built cottage consisting of two “leaves” of random stone with a variable width cavity. The outer leaves were buckling due to inadequate tying and foundation movement, and the energy efficiency of the cottage was very poor, as conventional wall insulation could not be installed for a number of reasons. Foundation repairs could not be undertaken due to the danger of the walls collapsing during the work. Pressure grouting and partial demolition were considered unacceptable due to instability and cost, and neither measure would improve the energy efficiency of the cottage.
Technitherm® was injected into the cavity to stabilise and insulate the walls so that underpinning could be carried out, followed by local rebuilding of the buckled panels. The injection was carried out over 3 days to minimise disruption of the random stone outer leaf. Such was the success of the Technitherm® installation that not a single stone was displaced and the process was completed with the owner in occupation.
After treatment with Technitherm® the walls were so stable that it was unnecessary to undertake any further structural repairs. Joints in the outer stone leaf were simply raked free of old mortar and re‐pointed. The cost was less than 1/6th of other accepted repair techniques. The cottage was weatherproofed due to Technitherm® being hydrophobic closed cell PUR.
Technitherm® enhanced the insulation of the walls and draught‐proofed the cottage in the single installation, and now the owner is enjoying warmer living conditions and lower energy bills. The structural repair was completed leaving the wall virtually unblemished.
Linen Mill Film and Television Studios
Formerly used as an Ulster Weavers bleachworks factory, the 32-acre Linen Mill Film and Television Studios in Banbridge, Northern Ireland had Icynene LD-C- 50 installed for acoustic and condensation purposes. Film and television productions filmed at the studios now benefit from improved acoustics and minimized external noise. .. read more
Icynene Spray Foam Selected for Prestigious Cancer Care Centre
The Icynene Spray Foam Insulation System has been selected as the insulation of choice for the new build Maggies Cancer Care Centre in Aberdeen. Icynene was selected by the projects architects Halliday, Fraser, Munrow as the insulation of choice for the walls and roof due to its long successful history, comprehensive testing and certification, unique non toxic properties and its ability to provide a complete insulation and air barrier in one application, U values achieved for walls and roof were 0.14 and in some areas as low as 0.10... read more
The work was carried out by Icynene accredited contractor Building Insulation Services, Penicuik, Edinburgh.
Timber Frame Kit, Biggar Lanarkshire
New build timber frame project involving the application of Icynene LD-C-50 to the roof and external walls.
The roof was sprayed to a depth of 200mm, external walls to a depth between studs of 145mm. Additional work to reduce noise from airborne sound transmission was carried out by spraying internal partition walls with 75mm of Icynene.
The work was carried out over a number of months to suit progress on site and on completion the Client’s comments included ‘staff were very helpful and knowledgeable’ with the overall experience of our company being ‘excellent’.
Historic Building extension, Milnathort
Project comprised masonry built extension to an existing building. The walls incorporated an insulated cavity and were strapped out internally with our foam being applied direct to the inner blockwork between studs to a depth of 50mm. The roof space was sprayed to a depth of 150mm. Work was completed to suit the Client’s programme with them saying they are ‘delighted with the insulation’, the quality of the installation ‘excellent’ and they would be ’happy to act as a reference'.
Lochalsh and Skye Housing Association
A project involving injection of Icynene Pour fill formula to provide additional insulation to older housing stock of Lochalsh and Skye Housing Association. A series of holes were drilled at 600mm centres and the material injected to fill the void behind the strapped and lined walls. Generally the work was completed within one day avoiding additional costs associated with the need to decant tenants. The success of this contract led to further work, one of which was a major project comprising the treatment of 70 their properties in Skye.
Icynene selected for Linen Mill Film Studios Banbridge Co Down
The Icynene Insulation system was selected for this film studio to eliminate airborne sound coming for traffic, aeroplanes etc and also to prevent condensation occurring on the underside of the roof during filming, the unit was successfully insulated within a two day period.
Project completed by Icynene Contractor Thermloc Ltd Ballyclare, Co Antrim.
Modern House on Isle of Skye
The complicated geometry, used by Architects Rural Design, to parts of the roof, caused a lot of head scratching by the site management team on how to achieve a high level of air tightness using tapes and membranes as specified by the Architects. It was decided that the two most intricate areas of the roof would be treated using Icynene spray foam insulation, as it was decided all around, that membranes could not be made to work effectively in these areas.
The Icynene rig was brought to site and in less than 2 hours these areas were treated with Icynene Spray Foam Insulation, guaranteeing an exceptional level of air tightness plus very effective insulation. The remainder of the building had membranes applied.
Icynene Contractor Kishorn Developments, Kishorn, Inverness & Isle of Skye
Isle of Muck Village Hall
The new village hall built on the Isle of Muck has been fully insulated using Icynene’s LD-C-50 spray foam insulation. As the logistics of getting materials to the Isle of Muck was creating a lot of problems to the main contractor, the solution of insulating with Icynene meant that the insulation could be taken to the island in 6 barrels in the back of a van, as opposed to the two 40 foot long artic loads of ridged board, which is what was originally specified by Dualchas, the architects for the project.
The Icynene was installed at 280mm thick around a steel and timber frame, and was completed in less than a week. Fitting ridged boards would have taken considerably longer, and would never give the high level of air tightness required by today modern buildings. Using Icynene on the project was the most responsible thing to do; a low carbon foot print has been achieved through greatly reduced road and sea transport, and a much higher level of building efficiencies.
Icynene Contractor Kishorn Developments, Kishorn, Inverness & Isle of Skye
Park Homes Project, Edinburgh
Images show the application of The Icynene Insulation System to the external walls and underside of the floor to a number of Park Homes projects in Scotland, this resulted in savings in excess of 50% on heating bills and a huge increase in the overall comfort of the home.
Work was carried out by Icynene accredited contractor Building Insulation Services Penicuik.