A recent investigation suggests in excess of 70% of damp problems associated with level thresholds originate through failure to interface correctly with the inner leaf and outer leaf of the cavity wall.
The Type LTT (Level Threshold Tray) by Cavity Trays of Yeovil is a ready-shaped DPC specifically designed for use on both inner and outer masonry skins at threshold level.
The Type LTT acts as an isolation DPC ‘glove’ enveloping and covering the top and the sides of the threshold masonry.
Once in place, flooring arrangements can interface with those skins at threshold level without danger of wet transference.
Where the Type LTT meets the reveal masonry either side of the opening it continues upwardly and around both faces of the reveal, wrapping the masonry skin and extending into the actual cavity. Any reveal cavicloser simply projects downwardly between protective wraps whilst the horizontal DPC in both skins safely terminates at any course level within each protective wrap.
The Type LTT by Cavity Trays of Yeovil promotes a standardised route to damp-free level thresholds.
In isolating the masonry most susceptible to damp transference, the Type LTT permits abutting flooring, abutting insulation and DPC’s / membranes to continue over an inside skin and converge with an exterior skin that itself is isolated from dampness at the point of convergence.