Saturated Insulation

On returning from the Christmas break in 2014 – we received more enquiries for Damp Surveys than we would normally expect.

What Is The Cause Of This?

The weather obviously is a major factor, long and persistent driving rain and strong winds has caused masonry to become saturated.

Cavity construction properties seem to be the biggest problem.

The cause of this problem, saturated cavity wall insulation; this together with the voids in the cavity wall insulation and debris in the cavities, has led to an unprecedented increase in damp problems.

Formaldehyde Foam, Mineral Fibre Insulation and Polystyrene Bead Insulation all seem to be affected.

What is the solution? In the most extreme cases, it is to remove the saturated cavity wall insulation together with any debris that may be in the cavity and either re insulate with a waterproof material or leave the cavity uninsulated.

There is also a product called Stormdry, a gel which can be applied to the masonry which lines the pores of the bricks and will allow insulation to slowly dry out.

If you have a property with an exposed elevation facing south west and have experienced sudden damp problems since Christmas of 2013, the cause is probably saturated cavity wall insulation.  You should also investigate the condition of the pointing and the rainwater goods.

This block of flats in St Leonards has had cavity wall insulation (mineral fibre) installed, you can just see some in the distance. These voids in the insulation cause cold spots and attract condensation. The mortar on the wall ties can cause bridging of the cavity allowing moisture a passage across the cavity.

This block of flats in St Leonards has had cavity wall insulation (mineral fibre) installed, you can just see some in the distance. These voids in the insulation cause cold spots and attract condensation. The mortar on the wall ties can cause bridging of the cavity allowing moisture a passage across the cavity.

A saturated insulated cavity wall in Eastbourne.

A saturated insulated cavity wall in Eastbourne.

This property in West Sussex had no problems before Christmas 2013.

This property in West Sussex had no problems before Christmas 2013.

Another property in Langney, Eastbourne with serious dampness, caused by wet cavity wall insulation.

Another property in Langney, Eastbourne with serious dampness, caused by wet cavity wall insulation.