Attic insulation when professionally installed is the most cost effective and efficient money saving device you can have in your home, with the potential to save as much as 50% on your heating costs. When aiming to acheive those savings insulating is only half the picture, without air tightness you can only at best hope to slow down heat loss and have some small effect on overall costs.
When converting an attic space from a storage loft to a living area the most important factor is to create a warm comfortable environment. To do this an unbroken thermal barrier must be installed at rafter level to create an airtight and permeable (breathable) envelope on the entire structure which will retain heat and eliminate unwanted airflow or drafts. Traditional insulation methods call for retaining cold spaces which need cross ventilation and therefore introduce drafts because they can not achieve full air tightness. This is where spray foam out performs all comers, when applied it will create an unbroken seamless barrier from wall plate to ridge between the rafters while still allowing timbers to breathe. Typically an average three bed semi is complete in under two hours ready for slabbing and plastering with no maintenance or further works required there after.
Closed cell spray applied foam is the only effective way to retro fit a water tight layer of insulation to any commercial or agricultural shed. At 25mm all condensation issues are eliminated. Bringing the depth 50mm will increase the comfort levels within the building to habitable conditions and at 75mm any structure can be refrigerated. The application of spray foam will seal any loose joints and screw holes which are allowing draughts and leaks to occur while generally improving sound and air quality within.
Grants are available to eligible applicants for undertaking the following works, in accordance with the requirements contractor Code of Practice Technical Specification.
To insulate a cavity with polyurethane a "slow pour" foam is used, this is injection applied through 10mm holes generally created through pointing where it is easily filled and barely noticeable. Given that cavity wall insulation is by its very nature a blind exercise, the only realistic method to follow is mathematical, first the depth of the cavity must be found, and in already understanding the expansion and flow rate of the material we then have a clear indication of the length of time pumping is required to achieve a complete fill. A squared drill pattern is required to ensure the foam when injected expands to meet itself at regular intervals and after the event all that is required is to fill any drill holes with a matching cement or exterior filler compound.
Page created : 15 | NOV | 2014