Bonding & Insulation
Sprayed polyurethane foam has been successfully used since the mid 1970’s to stabilise, seal and insulate older tile
and slate roofs where no lining is present.
It has a Class 1 certification for surface spread of flame which will not add to the fire hazard in a loft space. We have developed a close working relationship with the technical services department of our suppliers and they are pleased to be involved when additional information and advice is required, such as U-value calculations and condensation risk assessments.
The applied foam has a core density of 32-36 Kg/m3. At normal application depths this adds less than 2 Kg/m2 to the roof structure.
The material is processed through a proportioning pump fitted in our van.
This machine is driven by compressed air and requires electricity from the domestic supply to power switches and the heater block.
The two components mix at the tip of the spray gun under pressure and are reacting as they are applied to the underside of the roof structure.
The flow of the rising foam seals the gaps which previously allowed the ingress of freezing winds, wind-blown rain, snow and debris.
The foam sets hard in minutes and its exceptional bonding characteristics enable us to confidently guarantee that treated slates or tiles will not slip for a period of at least 20 years.
The insulation qualities of closed cell polyurethane foam are excellent and will reduce the condensation that normally occurs in a roof.
Specific apertures are maintained at the soffits to ventilate the loft space.