Slate Roof Stabilisation


The property in question was a 1930’s terraced house with a slate roof, typical for this area of Lancashire. The client -- Mr Blackburn -- had lived in the property for years and was looking to invest in his home for the future. However, over the course of the last 10 years, Mr Blackburn had required numerous small repairs to be carried out to the roof due to slates slipping and falling out and other issues. Each of these visits by roofing contractors, although not carrying out major work, had cost between £200 and £500 per visit which, over the course of 10 years, adds up to a considerable amount. As Mr Blackburn was looking to re-decorate the house and invest in new furniture and fittings, he decided that the first thing that needed investing in was his roof.

Conventional Methods

As stated above, the client had already spent a considerable amount of time and money having the roof repaired and was now looking for a guaranteed solution. His first step was to get quotes to re-roof the property, these quotes ranged from £1800 to £3000 and most involved replacing his original Welsh slates for cheaper new ones. In addition to the quote, the companies involved would also keep the Welsh slates and get money back for them at reclamation yards.

Once the client had received these quotes, he then contacted one of Edu-Chem’s approved contractors to provide a quote to repair his original roof and install EduFoam insulation. As the Welsh slates on the roof are a natural product they will generally last for many years, the major problem with this roof was that the metal nails holding the slates to the battens had rotted through so the slates were not secured to the roof properly. Once surveyed and assessed by the contractor, the client was provided with a quote to repair the roof, install EduFoam insulation and guarantee the roof for a minimum period of 25 years which he was happy to accept.

The Roof Problems

After a thorough survey of the roof, it was found that most of the nails holding the slates had fatigued to a point where they could no longer hold the tiles on to the roof. This in turn led to slates slipping out of position and falling from the roof, especially in windy weather. As this was the original roof, there was no membrane underneath the slates so any water which got through the roof came straight through into the loft -- this was leading to damp patches on ceilings and walls which would affect any decoration works. Also, where slates had previously come out, some of the repairs had used ill-fitting and non-matching slates leaving those areas looking worse than they were. In some areas, parts of broken slates could be seen hanging from the roof where they had broken but not come out.

Problems with slate roof caused by nail fatigue

Slipping slates caused by nail rot








The Solution

The approved contractors firstly set about preparing the roof for the installation of EduFoam, this involved; making sure that any slipped slates were re-positioned, any cracked, broken, missing or non-matching slates were changed for reclaimed slates to match the existing roof, all lead-work around the chimneys was checked and replaced or repaired as required, any missing or loose pointing was replaced and the unsightly tags currently used to hold the slates in place were cut off.

Repairs being carried out to a chimneyRepairs to a slate roof








Once the exterior of the roof was prepared, the contracting company then began getting ready to install EduFoam to the interior. To ensure that Mr Blackburn’s house wasn’t adversely affected during the whole process, dust sheets were put down throughout the property to ensure that no dust or dirt was left and, once the installers were in the loft, the loft hatch was sealed to prevent any dust escaping. When the house was prepared, the contractors then began to remove any loose back-pointing from the underside of the roof, cover any belongings in the loft and set about installing the EduFoam system. The materials are delivered from the contractor’s vehicle outside up to the loft through heated, covered and protected hoses, once in the loft the liquid materials are applied to the underside of the roof through a pressurised mixing gun. During the application, the foam is applied as a liquid to the underside of the roof where it quickly ‘cures’ to form a rigid layer of polyurethane insulation and bonds directly to the slates, completely replacing the need for fixing nails.

EduFoam insulation used to stabilise a slate roofEduFoam sprayed insulation being installed to a roof








On Completion

Once the contracting company had completed the roof work and installed EduFoam insulation, Mr Blackburn was given a written 25 Year guarantee on his roof covering against any future slate loss or slippage and any leaks through the treated areas. With the peace-of-mind he had once the work was completed and his roof was guaranteed, he also invested in having the whole house re-decorated safe in the knowledge that there was no longer any danger of damp patches appearing or wallpaper falling off due to leaks through the roof.

What the Client Said

Six weeks after the completion of the works, Mr Blackburn said:

For the last 10 to 12 years I have been having problems with my roof and paying upwards of £200 each time to have things sorted. When the time came that I wanted to spend some money on the house so I could be happy in my retirement, I knew that I needed to get the roof fixed in order to get everything else done. After getting a few quotes for a new roof, I spoke to somebody I knew who recommended looking at spray foaming the roof to get the guarantee. When I got the quote through to have the roof repaired and sprayed I was pleasantly surprised as I had no idea how much it would be.

Now that I have had the work done I’m very pleased with how everything went, the contractors were very pleasant and explained everything they were doing. When the work was finished I got the written guarantee for the roof, as well as an insurance backed guarantee for added peace of mind, and then started to get the rest of the work done on the house. Not only did my roof get fixed and guaranteed, I also found that the added insulation was helping with the bills and meant that I could store things in the loft without everything getting covered in dust.

For more information on roof stabilisation, or to find a recommended contractor near you, please feel free to call us on 0161 876 8040 or click here to contact us directly

Newsletter Signup

powered by MailChimp!