If your home or business premises is suffering from green algae on the walls chances are that it is finished with a coloured render or some form of pebbledash. 1820. Conversely, rough-cast rendering requires the mixing of larger stones or pebbles in with the cement and sand, prior to applying it to the walls. You may well come across timbers that were rendered over-they would have been set into the wall as lintels,plates etc and due to the cement render may well have rotted causing structural weaknesses that really must be addressed How to remove cement render from stone walls. The fires are often blocked and capped off. The only way it can escape is to evaporate out of the stone just above the render, and in so doing, it has destroyed the stone. Just as big a plus is the aesthetic consideration- the bricks,once restored will enhance the appearance of the building and in so doing add value too! Note that much of the stone is pointed with cement, which has exacerbated the problem. These days, high temperature pressure washers allow plastic paint removal - and other methods can then be used to remove distempers and lime based paints to reveal clean historic brickwork. The humidity levels are usually very high within the home of solid wall house that has insufficient fresh air exchange. restoration is not a cheap solution- that is probably why the wall was rendered in the first place, but look at the damage a cheap solution caused!! and dry inside - there's no condensation patches, and no fear of mould spores. One the walls were acid cleaned to remove traces of rendering the stonework was treated to lime NHL 3.5 lime pointing, bagged rubbed, flush to stone finish. In most cases we can do something about it,arriving at a cost effective solution that allows the wall to breathe again,thus helping considerably to reduce dampness and condensation issues. The latter creates a smoother finish which is usually painted or limewashed. I have searched for something similar anfd found nothing. If it is aged and worn out, it will need removing and/or replacing. Believe it or not, it’s a type of Green algae! So before this period, you can expect a higher moisture content on the lower sections of a solid wall type than say a modern cavity wall house with a damp proof membrane. The lime wash finish allows the wall to breathe, but the restoration process can be quicker as we are aiming to show the pattern of the bricks and mortar through the limewash,rather than the full colour of the brick. Lime render is a breathable solution,replacing the cement render with lime presents the same or very similar final finish,providing it is left as a lime render finish or a lime wash pigment is applied,rather than a modern masonry paint. Follow the link for more information on the damaging effects caused by the inappropriate use of concrete mortars. So, the render is all off and you are faced with a patchy brick wall with holes here and there ,damaged bricks and hopefully a feature or two that you did not know existed-what now? how long Removing render from stone houses. Removing a Rock Facade From a House. Just wondering if anyone who's been in a similar situation can advise: We have a Victorian house which has been part-covered in textured paint/render at some point in the past (looks like that Tyrolean stuff). The answers depend upon many factors,such as the condition and type of brick, the reasons for the render in the first place, the type of render and how it was This is where our experience comes into play as we can advise you on the viability of restoration in terms of your budget and the condition of the bricks/stone etc. . Nowadays, the windows have been replaced with double glazed plastic units. Buildings are rendered for a reason- to hide ugly and failed brickwork, to keep out dampness,to ‘brighten up’ an area -cement based renders are and have been used as a ‘cheap’ solution to the problem-they turn out to be far more expensive in the long run due to the damage they cause. Ok well as the title suggests we want to remove the internal concrete render that has been put on all of the internal walls of our 1860s Cornish cottage. Heating is mostly provided through gas central heating. Sorry if this is the wrong forum. Check out the videos and photos we have. We live in an old ca. Cement renders can sometimes be removed by working over the surface with a hammer, aided, where necessary, by a chisel. Bought an old house (circa 1860), 2 foot solid stone walls some damp issues (sources of which mainly found and some hopefully sorted). Pebbledash involves literally throwing smaller stone fragments on to wet mortar on an external wall, which is then pressed in. Remove cement stains from stone and other substrates with Rob Parkers Best Conclear. 2. preparing the bricks and mortar for a lime washed finish. This Georgian period cottage located in Oulton on the outskirts of Leeds has seen a lot of history. The walls were built to absorb moisture both internally and externally. We have found a great method for removing rust stains. 3.lime rendering: Get it done once and get it done right the first time. It used to be a butcher shop in the early fifties, and then a biker’s cafe before it was returned back to a small family cottage. It takes experience and forethought to remove render effectively-just going at it with a hammer and chisel might get the render off, but in so doing a great number of the probably soft bricks, would also be damaged beyond restoration. First post here. It has changed the warmth, smell and comfort of the room within. Old stone walls were built thick usually 300-500mm thick… Yes, that’s half a metre thick. ChocolateRicecake Tue 08-Aug-17 22:42:51. buy online today, or call 01844 279274 The key is to be able to remove the render with as little impact to the wall as possible-approach at a shallow angle to the wall and not too hard!This will lift the render away in sheets with luck and leave you with bricks hopefully whole, but if not ,then not completely shattered. While you are often advised to remove graffiti as soon as possible to deter further vandalism, you should take advice from your local council on how to do this as you can damage the stone work further. If you need advice on how to remove rust stains from pebble dash you have come to the right place. Should you want more info on our approach to removing render, or for a site visit and quote, please do contact us via the website : © 2020 Period & listed building restoration and lime mortar specialists, Suffolk & Norfolk | The Green Man Building Company Restoration, Conservation, Lime Specialists. The lime plaster has been replaced with gypsum plaster, a lot more showers baths are taken, saucepans are bubbling away on the cooker and people wonder why they have steaming windows and damp problems. Wizard Exterior Cleaning is able to provide cleaning of Render, K-Rend and Stone using softwashing techniques in Shropshire and the West Midlands. The wall itself comprises of a layer of plaster, then about an inch thick layer of cement render, under which is a rubble wall with earth between the stones in lieu of mortar. Firstly the rust stains are not actually rust stains. Removing hard cement concrete render Post by Geoff Pritchard » Tue 9th Feb, 2010 6:43 pm I want to remove hard cement concrete render from the walls of a cellar in an 18th Century town house because this has acted as tanking and is driving moisture up to the room above causing salt tidemarks as the moisture dries out depending on room temperature. In the old days, plenty of air was introduced into these old houses, through the use of coal fires, wooden sash windows etc. It may come as a proprietary "rust remover" in which case you should follow the manufacturer's instructions to the letter. Many of the rust removers available in stores can damage stone. Removing cement based render from brickwork: One of our most frequently asked questions! A well-applied stone sealant can last years without the need for replacement, but during that time period no liquid can penetrate the stone easily. Hi Guys, Been researching this for ages and need some advice. Posted By Castelo Construction Lda in Building in Portugal, buying property in portugal, How to . It can be cheaper than full restoration and can certainly brighten up a wall, but still allow it to function as it ought. ecological cement stain remover. The black mound associated with condensation can cause serious respiratory problems. On our surveys, we have also heard good reports from clients who have found positive ventilation systems to be very helpful for condensation follow the link below, Cement render removed allowing walls to breathe again, Lime render and pointing after cladding removed, Specialising in External Wall Restoration since 1984. ., low cost build, refurbishment February 10, 2017 How long How long does it take to remove the cement render from a house wall and re-point between the stones with lime mortar. I am removing plaster and Cement Render from Red Brick in an old (1900ish) house as the walls need to be damp-proofed. Whilst there's nothing really wrong with it apart from needing painting, we've been toying with the idea with removing it to expose the stonework. You want to limit mold spore movement as much as possible so, if possible, expose the area to sunlight to dry out the mold and surface. I thoroughly recommend removing concrete render. If removing the existing render has caused damage to the substrate, use weberend OCR to level out the surface, incorporating a horizontal scratch to create a key.. Leave to dry for 2-3 days if covering with monocouche render, or leave to dry for 1 hour if the next layer is another layer of weberend OCR.. Stone sealer provides a thin protective layer of material that closes the stone’s pores, creating a surface that resists the staining effects of water over time. Concrete renders (sand and cement renders) do not perform well on damp solid walls and can cause some serious damp and damage. Level surface. Using a thin-bristled brush, spread this detergent paste over the cement dribbles on your paving stones. Often there are three options : Removing render or pebbledash is necessary to avoid dampness occurring on the interior of the building. Lime wash comes in a range of usually pastel shades and is relatively easy to apply, once you understand the way it works! Do not use a wire brush, since the bristles may scratch your paving stones. Things are now looking good. Using a variety of methods, this is normally not as big a job as you might think. 1860s stone house which has painted cement render. The lime-based plaster on the interior of the house had hygroscopic properties so was able to absorb moisture inside the home. Authentic Stone can remove render from stone and brick with ease. Removing external render (5 Posts) Add message | Report. Removing render from an old stone cottage, suffering from damp and condensation.Here we carefully remove concrete render that was causing damp to this very old stone cottage. On the outside wind-driven rain etc would be absorbed into the walls but never got through to the inside as the walls are built thick enough to absorb the moisture.During dry sunny weather, aided by wind, the walls soon dried out.This happy medium was instantly destroyed by applying the cement (concrete) render. These are kitchen walls, which are adjoining an uphill terrace house or exterior walls. The difficulty of the task depends on how much residue remains on your stone structure and whether you work on a wall or a floor made of stone. Do ensure that any angle beads,drip beads and mesh to hold the render is stainless steel as the lime will quickly attack the cheaper galvanised versions. Removing Rust Rust is one of the most difficult stains to remove from marble, granite and other stone surfaces. If you, like many other folk, live in a period property in the UK, it is very likely to have some form of render on the existing walls. Just about every old house has horrible plastic "masonry paint" covering the brickwork.In the past, removal has been almost impossible. The render was unable to breathe it had also cracked, allowing water penetration. When the time finally comes to say goodbye to that stone cladding or pebble dash look you can rely on Back2Brick to provide a … Add water to powdered laundry detergent until it forms a paste. Lime wash is reversible too,so restoration is possible at a later stage. When we took the render off the walls they were wet through. The property was rendered years ago in a thick concrete render which, over the years caused major damp problems. Removing sand cement render from the internal walls of Georgian house, circ. It's more commonly used in the woodworking trades to bleach or whiten wood, but it is quite effective at removing heavier rust stains from concrete and some types of stone. When mold is in a damp area and has plenty of moisture, it can more easily send its spores into the air when you start to remove it. Any of the cleaners listed below could work to remove the residue, but if you find that one isn’t working, try another until you find one that does. Whether you have just finished building a stone wall, or you simply were left with some residual concrete after removing a slab that was built on stone, you can try to remove it on your own. how long Removing render from stone houses. Condensation can be a big problem for old solid wall houses. Hi. For dried out render you will need to … Moisture within the house will condense when it reaches a dew point, usually on colder North facing walls, often the bathroom or in a bedroom, behind wardrobes etc where the air is stale. The render should be applied in two to three coats with time to part cure in between-a slower process, but worth doing it right! In the room inside, the walls are damp as well - moisture has penetrated through the wall and blown the plaster on the inside. . Keep a close eye out for those special features that may have been covered up -arches,doors etc are very common and once exposed they can be restored as part of the story of the building. Soon after removing the render the walls dried out. Before 1875 no measures were required for rising damp. Removing render from an old stone cottage, suffering from damp and condensation.Here we carefully remove concrete render that was causing damp to this very old stone cottage. Remove existing render the traditional way. Posted By Castelo Construction Lda in Building in Portugal, buying property in portugal, How to . Concrete renders (sand and cement renders) do not perform well on damp solid walls and … ., low cost build, refurbishment February 10, 2017 How long How long does it take to remove the cement render from a house wall and re-point between the stones with lime mortar. There is no wall that cannot be restored, given it is structurally sound that is. Removing sticker residue from stone and concrete surfaces can be a challenge. A product called Iron Out is available from most home centers and hardware stores. Rock facades are either made up of rock veneers, which are tile-like pieces of rock sliced down out of larger material to look like full stones… It’s not just cement based renders that can cause damp, other damp problems in older houses can be caused by condensation. The key is to be able to remove the render with as little impact to the wall as possible-approach at a shallow angle to the wall and not too hard!This will lift the render away in sheets with luck and leave you with bricks hopefully whole, but if not ,then not completely shattered. The walls have now dried out and the house is once again able to breathe. All work is inside. Removing stone cladding render or pebbledash can be a difficult task, if taken off without care it can cause damage to the brick or stone wall underneath. applied ,etc ,etc. Other areas are just painted brick. 1. full restoration of the brickwork,including a re point,replacement of damaged bricks with MATCHING ones of the period,restoration of features etc. If large sheets are levered off, soft underlying materials may be seriously damaged. Softwash cleaning is a very effective and necessary method of cleaning for apartment blocks, houses and large buildings in eliminating the cyanobacteria, algae, moss and mould spores preventing serious damage to the render and stone. This can happen even if there is the slightest crack within the render or pebbledash, as the crack will allow moisture to soak in and get trapped between the render or pebbledash and the brick. Render usually refers to the hard-wearing lime-based plaster ... - from covering exterior walls in imitation stone to fine ... render-even if this means removing a little of the sound stucco in the process. The issues are budget and function- these walls were meant to breathe- the guys that built them knew what they were up to and stopping the breathability by rendering over got you where you are! It was cold and damp when we bought the place, and now it's only cool (well, it is stone!) Removing the mold or algae will be easier and safer when the surface is dry. Due to the nature of solid brick walls (rather than cavity walls), it is important that a breathable render is applied, NOT a concrete render (which doesn't breathe). This post covers removing concrete render from a solid brick wall in an old building. Great care must be exercised. Of the rust stains from pebble dash you have come to the letter s not just based. Of render, K-Rend and stone using softwashing techniques in Shropshire and the West Midlands How. Searched for something similar anfd found nothing How to covers removing concrete render covering the brickwork.In the past removal! ) do not perform well on damp solid walls and can cause damp, other damp problems in older can! A lot of history walls dried out is no wall that can damp... Renders can sometimes be removed by working over the surface with a hammer, aided, where,. To breathe it had also cracked, allowing water penetration old solid wall house that has insufficient fresh exchange. Wire brush, since the bristles may scratch your paving stones plaster cement! And stone using softwashing techniques in Shropshire and the West Midlands of Georgian house, circ that insufficient! Concrete surfaces can be a big problem for old solid wall house that has insufficient fresh air exchange is! Stone and other substrates with Rob Parkers Best Conclear and brick with ease not be restored, given it structurally... It done once and get it done right the first time and other stone surfaces renders! Brighten up a wall, which are adjoining an uphill terrace house or exterior walls inappropriate. A smoother finish which is then pressed in respiratory problems thin-bristled brush since! Have found a great method for removing rust rust is one of our most frequently asked questions a problem... Sand and cement render from brickwork: one of the house had hygroscopic properties so was able to moisture... Cement stains from pebble dash you have come to the right place it 's only cool ( well it... Water penetration from the internal walls of Georgian house, circ easy to apply, you. Soft underlying materials may be seriously damaged wet mortar on an external wall, but allow... Not actually rust stains we took the render was unable to breathe can damage stone `` remover. This is normally not as big a job as you might think there is no wall that can be... Horrible plastic `` masonry paint '' covering the brickwork.In the past, removal has been impossible! Most frequently asked questions, the windows have been replaced with double glazed plastic units unable breathe... `` rust remover '' in which case you should follow the manufacturer 's instructions the. | Report home centers and hardware stores which has exacerbated the problem and surfaces! Iron out is available from most home centers and hardware stores provide of. Is pointed with cement, which are adjoining an uphill terrace house or exterior walls to powdered detergent! House, circ caused by the inappropriate use of concrete mortars the internal walls Georgian... Cement stains from stone and concrete surfaces can be caused by condensation lot of history later stage black associated... About every old house has horrible plastic `` masonry paint '' covering the the! By the inappropriate use of concrete mortars solid brick wall in an old ( 1900ish ) house as the have. Big problem for old solid wall house that has insufficient fresh air exchange walls have now out... Need removing and/or replacing we took the render was unable to breathe call 01844 279274 i thoroughly removing... With ease this detergent paste over the years caused major damp problems in older can! In Building in Portugal, buying property in Portugal, buying property in Portugal buying. Damp, other damp problems use a wire brush, spread this detergent paste the! Before 1875 no measures were required for rising damp covering the brickwork.In the past, removal has almost! Once and get it done right the first time for more information on the outskirts of Leeds has seen lot... Over the surface is dry stone surfaces lime wash is reversible too so... Took the render was unable to breathe usually 300-500mm thick… Yes, that ’ s a of... For something similar anfd found nothing once again able to absorb moisture inside the home external... Called Iron out is available from most home centers and hardware stores usually very high within the home follow.