Damp-proofing and waterproofing specialists from Remedial Treatment Consultants were also brought in to carry out the installation works.

These previously treated walls were starting to show signs of damp above the replastered area, showing peeling paint and blistering plaster. Damp-proofing experts, Surrey Hills Preservation, were called in to survey and fix the problem.

This domestic property is located in the Derby area. It is a typical semi-detached house that was built during the 1950s. The building is a brick-built cavity wall construction with a solid ground floor.

The contractors who carried-out the modifications to the building had attempted to provide some protection from the elements by constructing a second outer-leaf brick wall on the new gable end. However, these works had been finished to a poor standard. As a result, one of the interior walls (which used to be a party wall between terraced properties) had been…

The Problem Due to a combination of extended wet weather and defective pointing, the weather facing walls of the property had been suffering from penetrating damp. This had led to damp patches, blown plaster and bubbled patches of delaminated paint appearing on the internal decorating surfaces.

This domestic semi-detached property is situated in the Sussex seaside town of Brighton. The house is a traditional brick build with solid walls double-skin walls and a render on the weather facing external wall.

The main living room area of the property was suffering from significant rising damp issues. Some parts of the wall were showing signs of salt contamination and the plaster was crumbling and blistering. After the initial survey was completed, it was evident that a ‘pressure injection’ type rising damp was carried out in the past, which had now failed.

This domestic terraced house in the seaside town of Bournemouth. The house is a traditional brick build with cavity walls and a render on the weather facing external wall.

This Victorian semi-detached residential property is located in the large seaside town of Brighton, East Sussex. The house was purchased a few years ago by the owners and has been undergoing general renovations.

This house was purchased in 2013. After receiving an initial survey during the buying process the property the owner followed instruction to have the house surveyed thoroughly for damp by an approved PCA contractor. RLH Developments Ltd were brought in to identify the problems and carry out the most appropriate solution.

The new owner wanted to restore the windmill as a domestic dwelling to a very high standard whilst conserving as many of the building’s original features as possible. To this end, Luke Bonwick, a heritage consultant specialising in windmills was employed. Because of the windmill’s Grade II* listing, it was also necessary to work closely with the local Conservation Officer…

This section explains the correct way to treat rising damp

Calculations show that the overall risk of condensation is reduced when using the Dryzone Express Replastering System compared with traditional sand:cement replastering systems. However, when using this type of product, due consideration must be given to the overall design to minimise risk of condensation and the recommendations contained in BS 5250:2011 should be followed. 

Where walls are known to be excessively contaminated with hygroscopic salts (e.g. old barns, old kitchens, chimney flues, stables) then consideration should be given to tanking the walls using Vandex BB75 tanking slurry prior to replastering as added protection for the decorative surface. Alternatively the use of the Dryzone Express Replastering System should be considered. Where masonry is unstable, this…

Drybase Flex is a new and innovative way to replaster walls after the installation of a new chemical DPC.

The plasters and full technical information will be widely available in first quarter of 2016. For more information or technical advice on any of the products in the Dryzone System range, please call us on 01403 210204.

The book is available as a free download. For a physical copy, please call us on 01403 210204.

The Dryzone System is as effective as a sand:cement render but cleaner, quicker and less expensive to install per m2. It allows the use of cement-based plasters to be avoided when treating rising damp on heritage projects. An air gap is also created, creating a warmer final surface and helping to minimise potential condensation issues. More information is available on…