Residential Home, Denny

The property

Before the Dehydration

This building is a typical Scottish "4 in a block" type residential property. The customer has been having an ongoing problem with the dampness and mould, which she thought to be condensation. Despite all remedy efforts the situation did not improve only got worse.

After performing a professional damp inspection it has been found that the property has rising damp.

After analysing all the options, the customer has decided to handle the rising damp problem with the Aquapol masonry dehydration system, because it was non-invasive to the masonry and it did not require any construction work.

The Aquapol system

Happy customers

The Aquapol System - Results

The Aquapol system has been installed in December 2013. The starting moisture levels have also been determined by taking drilled samples from the core of the wall, from 3 different wall sections (measurement test points M1, M2, M3).

Follow-up moisture measurements have been taken 6 months later in June 2014, then again at the end of October 2014. The results are presented in the chart below:

Change in moisture values after 11 months

Changes in the wall moisture content after 11 months

Test Point M1

It can be seen that at M1 the moisture content dropped significantly inside the core of the wall during the first 6 months, from the initial 8.1% water content to 1.5%, which is considered dry by any standards.

The change was visually perceivable on the walls; their colour became lighter confirming their dry state. The mould growth has stopped without any additional action.

The wallpaper has been removed from the lower part of the wall to facilitate the wall's dehydration.

before Aquapol

Before Aquapol

after Aquapol

After Aquapol, 6 months later

Test Point M2

After 6 months there was relatively little change in M2, the point where the moisture values were originally the highest. This point had a strange behaviour from the very beginning as the moisture values in the middle section of the wall were higher than at its base. That wall had a tap outside used for watering the garden, however at the time of the installation that tap seemed to be in good working order with no wisible leaks.

At the 6-months check, with the dehydration stagnating at this point, the Aquapol engineer has done some investigation and discovered that ANOTHER tap at the customer's neighbour was indeed leaking. This other tap, located inside the neighbour's house, had quite an abundent leak and kept that wall in a permanent damp state, which explains why the dehydration of this particlar wall section has stagnated during these months.

The leaky tap has been fixed shortly thereafter.

The other tap inside

The leaky tap inside the neighbour

Wet floor covering

Leaky tap, wet floor covering

Wet wall base

Leaky tap making the base of the wall wet

Leaky tap inside

Close-up of the leaky tap

Four months later, in October 2014, another sets of measuremens have been taken, and the moisture values at this point more than halved, from 17.2% to 7.5%. After the leaky tap has been fixed this point started drying out very nicely. The dehydration of this wall section is still ongoing (we are aiming for 3% or less moisture) and a final set of measurements is scheduled for June 2015.

Test Point M3

Moisture values have decreased at this point too.

Restoration work

With the dehydration of the building progressing so nicely, the physical restoration of the affected areas has been started. The wallpaper which facilitated the formation of condensation and black mould, has been removed. The rooms will be painted with breathable lime- or mineral based paint.