We are now offering all insulation at 0% VAT!

Certainfil Cavity Insulation Limited - 3 Fairway Gardens, Belfast, Northern Ireland, BT9 5NP - info@certainfilcavityinsulation.co.uk

What is Partial Fill Cavity Wall Insulation?

Traditional Cavity Wall Insulation (Built between 1934 & 1984).

Partial Fill Cavity Wall Insulation


After 1934 houses where built with empty cavity walls , these cavities range traditionally from 50mm to 75mm wide. The vast majority of this house type have had insulation installed in the cavity over the last 40 years.

Partial Fill Cavity Wall Insulation (Built after 1985).

Partial Fill Cavity Wall Insulation

Some builders started to built in a solid board around 1985 onwards This board was approx 30mm and fitted against the inner leaf of the cavity, at this time cavities increased from 75mm to 100mm. In these cases this left a 70mm space of the cavity with no insulation.

Many houses built between 1985 until 2008 have a 30, 40 or 50mm board fitted in a 100mm cavity. If these house were built to today’s building standards they would have double or even triple the amount of insulation in the wall.

With certainfil cavity insulation it is possible to double or even triple the amount of insulation in the wall by installing additional insulation into the cavity. Making a marked improvement to the heating of the house and reducing fuel bills. In the insulation industry we refer to this process as PARTIAL FILL CAVITY INSULATION.

Request a Quote