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Removing Cement Pointing

Lime Rendering Ashlar Effect Stucco to Front & Rear Elevations in Cumbria

Grade II Listed Building Lime Rendering

On the project Nr St Bee's in Cumbria we were asked by the client to re-render the front rear elevations of this Grade 2 Listed Building in Cumbria. The stonework had been pointed with a cement based mortar in the past. The client wanted the lime render to be a ashlar lined finished stucco. We first started to remove the cement based pointing for the front and rear elevations. We used only hand tools to remove the cement mortar from the stonework.

Lime Rendering Listed Building in Cumbria

This picture shows the rear elevation of the Grade 2 listed building in Cumbria we were lime rendering. The rear elevation had been cement rendered with again we removed with hand tools. We had to prep the stonework prior to Lime Rendering the stone wall. All the voids in the stone wall had to filled with a Lime Based mortar. For this we used a NHL 2 Lime mortar.

This lime mortar was tightly compacted into the open stone joints of the listed building in Cumbria. The Lime Mortar was compacted with a packing iron. Our Listed building specialists have worked on many building in Cumbria under taking Lime Rendering & Lime Plastering. The stone on this Listed Building in Cumbria is the traditional red stone sand you get in Cumbria, Chester and Liverpool.

Gauge Pointing Stonework

Here our Restoration specialists are pointing the the red sand stone prior to applying the Lime Render to the stone work. Our Restoration team used a NHL 2 Lime mortar for the pointing work on the Listed Building in Cumbria. This Lime mortar was mixed with a local sand that we had tested to ensure it was right for use in Lime Mortar. Our Restoration Specialist team can under take any work to a Listed Building in Cumbria.

It is important to prep the stone wall correctly before applying a lime render. We would normally use a NHL 2 or a NHL 3.5 to do this task. We erected a roof over the scaffolding to protect the lime render from the weather in Cumbria. We also install mono-flex sheets to the scaffolding to prevent the Lime mortar from drying to quickly. We had to ensure that all the cement mortar from the stonework had been removed before we started to apply the Lime Mortar.

Lime Rendering Contractors in CUmbria

At this stage in the Lime rendering process we have applied a lime pointing to the stone wall. This is done to even up the stone wall prior to lime rendering to ensure the base coat of the lime render is even which will help prevent cracking of the base coat lime render. If the stonework was not pointed up prior to the lime render being applied some area of the stone wall where the joints are would be having up to 30mm of Lime Render applied. We would normally be looking to applied a maximum of 15mm Lime Render on a base coat.

Once the lime pointing has been completed our Restoration Specialist team left the lime pointing mortar to carbonate for around a week. During this time the lime pointing can crack due to shrinkage it is important that these cracks a knocked back to tighten up the cracks. If this process is not done the cracks with appear in the base coat of the lime render.

Float Coat Lime Render

Now we have applied the base coat Lime Render of the stucco render. This based coat lime render has been applied around 10m thick. We have used a wooden float over the to render to ensure the render has been compacted onto the surface of the stone. As before with the lime pointing coat it is vital that the lime render does not dry out to quickly or the lime will not carbonate. If the lime render does not carbonate ultimately it will fail in time.

Most failure in Lime Render is due to the render drying out to quickly after it has been applied to the brick or stone work. The lime render was applied by using steel floats, it is important that the steel float finish is broken down to create a rough textured finish. It is also as important that the stone wall is wet down prior to applying the lime render, not just once but wetting should start about 2 days prior to rendering.

Hessian Sheets covering lime render

Once we had applied the lime render to the wall on the Listed Building in Cumbria we sheeted the new lime render with Hessian sheets. The Hessian sheets had been soaking for 24hr before we hung them on the wall. The Hessian sheets prevents the new lime render from drying out to quickly and always carbonation to take place. We normally leave the the Hessian sheets on for around 3-4 days depending on weather conditions.

The Hessian sheets have to be wet down 2-3 times a day again depending on weather condition on the day. Our Restoration Contractors have experience on applying lime renders and stucco renders, when using lime renders it is very important that only experienced Restoration Contractors are used. Our Restoration Contractors working in Cumbria on all types of Listed Buildings, Churches, Castles etc.

Listed Building Lime Rendering

We have removed the Hessian sheets from the lime render on the rear elevation. We are now preparing to apply the float coat lime render to the wall on the Listed Building in Cumbria. Once the Hessian sheet has been removed we check the lime render for cracks, if the lime render has cracked we tamp the render to close the cracks. The float coat lime render would normally be applied at 8mm - 10mm depend on conditions.

Most listed buildings in Cumbria have been pointed or rendered in a cement based mortar. If the external of the building has a cement based mortar this will prevent the Listed Building from breathing, moisture will trapped in the building. Once the moisture is trapped in the building it will preventably track to the internal of the building. This will should as plaster de-bonding and falling off internally, also slats would be showing on the plaster work.

Lime Rendering in Cumbria

The front elevation here is ready for the application of the top coat stucco render. The Lime Render has been on the stone wall for 5 days before we applied the stucco render to the elevation. As with the rear elevation we ensured that any cracks in the lime render had been tamped close prior to the application of the stucco render.

The stucco render is a NHL 2 lime based render blended with a medium course - fine course sand with a maximum particle size of 0.5mm. This is to ensure that sand grains do not damage the render as the lining of the lime render is done. The Stucco lime render is allowed to dry for a few hours before the ashlar lining is done tot he lime render. Restoration Contractors in Cumbria are skilled in the application of the stucco lime render. Sometimes stucco renders can be made from Roman Cement mortar as well as lime mortar.

Lining out Stonework in Lime Render

We applied a NHL 2 lime render for the top coat. This top coat lime render was applied with a steel trowel and once applied was left for a few hours to harden up. Our Restoration Contractors then used a wooden float to level the top coat lime render and also give a textured finish to lime render before lining out of the ashlar blocks in the stucco render. The Stucco render is only really to be undertaken by a Restoration Contractor who has experience is stucco render. We have done many stucco lime rendering and roman cement rendering job in the past. After the lime render has been lined out to the render we applied lime wash to the stucco render. This lime wash was colored to a stone color.

The stucco lime render lining out can be very difficult to get correct and also defined lines. We use a lining iron which is basically flat bar shaped to enable the lining out of the lime render to create a stucco ashlar replica render. The surface of the lime stucco render has been finish with a wooden float to create a textured surface looking like stone ashlar blocks. These top coat stucco lime stucco render require at least 3 coats of lime-wash paint. On this project we used a NHL 2 hydraulic lime render for the top coat.



Stucco Lime Render Ashlar Lining Our Building Contractors working in Cumbria on Listed Buildings with Damp problem on internal walls. If old building are showing signs of damp and moldy walls it is usually caused by moisture ingress from external elevations. This moisture can be caused by cementitious material applied to the external walls. Cement mortars for pointing and rendering can enable moisture to be trapped within the masonry wall. The trapped moisture in the wall cools the wall which enable the moist air internally to condense on the damp wall with mold. Any solid wall building Churches, Farmhouses, Cottages, Listed Buildings can all be suitableness to internal damp wall issues. With the weather conditions of in Cumbria and the high rain fall this makes the issue of Damp and internal mold on wall more likely.
Ashlar Effect Lime Render The picture of the finish lime render stucco. We have applied a NHL 2 hydraulic lime render to the Grade 2 Listed Building in Cumbria near St Bee's. The total stucco render is made from 4 coat of lime render. The stucco render has been lined out to replicate ashlar stonework. This was a fashion on high end Grade 2 and Grade 1 listed building in Cumbria and the rest of the UK also in areas like Lancashire, Yorkshire, Manchester, Chester. We operate or UK Restoration Builders Contractors and work throughout the UK


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