Insulation for a better tomorrow



The wall may be constructed leading with either leaf. It is good practice however to lead with the outer leaf as this allows the mortar joints on the cavity face to be cleaned and to check that the joints are all fully filled. The usual procedure for construction is;

  1. The leading leaf of masonry, ideally the outer leaf, is built with the first row of wall ties at 600mm centres where the insulation is to begin.
  2. The first row of URSA Cavity Batts, cut to size if necessary, may begin below the DPC in order to offer edge insulation to the floor.
  3. The inner leaf is then built, normally level with the top of the URSA Cavity Batts. It is permissible to build the outer leaf one brick higher to secure the next row of slabs – ensure mortar is cleaned from the cavity face.
  4. Raise the leading leaf to the level of the next row of wall ties, normally at 450mm vertical centres and 900mm centres horizontally. Ensure that the drip is positioned at the centre of the cavity and that the ties slope down towards the outer leaf. Excess mortar should be cleaned from this leaf before fitting the URSA Cavity Batts onto the lower ties.
  5. The outer leaf is then built to the level of the top of the slabs and the process repeated.
  6. The subsequent rows of slabs should be fitted with vertical joints staggered i.e. brick bond with all joints tightly butted. Batts with damaged edges or corners should not be used.
  7. As work proceeds ensure that the top edge of the URSA Cavity Batts is clean and free from mortar droppings. The use of a cavity batten will help to protect the slab edges as the next section is built.
  8. Cut sections of slab may be required around openings or at corners. It is essential that these be cut accurately to fill the space they are intended for and are adequately secured.
  9. Ensure that partially completed walls are protected from inclement weather (wind, rain and snow) and at the end of the day’s work.