Easy Board provides the solutions to many of the problems associated with the various insulating methods currently on the market. The following are a sample of these problems and by using Easy Board they can be solved.
Joe Little talks about existing dry lining problems
Traditional Internal Dry Lining Problems
Below shows the existing Methods of insulating walls on the inside of a building. The wall has been battened out using timbers and existing insulation. The boards are then screwed to these battens. On the opposite side of the drawing the boards are stuck on to the wall using “Adhesive dabs”.
Problems of dry lining using battens and adhesive dabs
- Drafts occur at these points (Around sockets and under skirting ect ) as there is cold air outside the insulated board.
- If pipes are required to come out from the wall, then there will be massive distribution losses as the will placed in a un insulated cavity.
Problems With Existing Dry Lining Method
Poor Workmanship with Current Insulation
Problems with External Insulation
- No quick heat gain when required.
- Not suitable with cavity wall construction.
- Hard to get a low u value with many systems.
The following costly and inconvenient tasks must be undertaken before proceeding with external wall insulation.
- Semi-detached houses will both need to be done together as by completing one in isolation will leave a step in the wall.
- Houses with a brick face are more expensive to be insulated, as you have to source special brick facing
- Remove footpaths from around the house or building, to allow the insulation to continue down past the sub floor. This is to try to reduce cold bridging, but in reality removing and replacing the footpaths alone is a massive job. If the insulation does not continue down past the sub floor it’s just another massive cold bridge.
- If the house or building has an uneven surface this must be removed to have any chance of overcoming thermal looping. Again another big undertaking if for example your house is dashed wet or dry. Even after doing all this unless the insulation is firmly fixed against the surface of the wall thermal looping will occur and heat loss as a result.
- Facia and soffit have to be removed to allow the insulation to extend up to try and stop cold bridging. However the cavity closer will invariably remain as a cold bridge in any event.
- All waste pipes, flues, vents, soil stacks downpipes etc will need to be extended.
- All gullies which are invariably close to the wall will need to be moved outwards.
- Service boxes (esb, gas, and phone) are a huge thermal bridge that will remain.
- Window cills have to be extended outwards and if remain will be a huge cold bridge.
- Scaffolding is required.
Problems with Insulated Cavity Wall Construction
Traditional cavity wall construction is probably the most prevalent construction method across the country. Nobody can disagree that it is a very robust form of construction and it is structurally sound. When constructed correctly it is virtually impregnable to moisture ingress.
However we now know that the fatal flaw with this form of construction is the poor thermal performance it achieves. Conventional wisdom although misguided, considered the internal leaf of block work to be a thermal store for the building The problem with this is that conventional wisdom did not take into account thermal looping.
The cavity insulation needs to be placed consistently tight against the inner block. This is extremely difficult to achieve consistently because the concrete blocks are built by hand with joints of mortar which continue to push the insulation away from the wall. Also joints in the insulation boards, at corners around windows etc allow for weak points for heat to escape. Unfortunately even with the best tradesmen building this type of wall, it is inconceivable to imagine that these problems won’t arise.
There are a number of areas where Thermal Bridging occurs, with a cavity closer being the biggest offender. S.E.A.I estimate that up to 25% of thermal losses in walls can be contributed to thermal bridging. As a result of these problems there are substantial ongoing heat losses there is certainly no quick heat gain.
Section of wall showing how heat is lost
The following image illustrates how insulation is not tight to internal leaf, which allows heat to travel upwards and escape at the cavity closer or at any thermal bridge.