Rendering in Langton Matravers

On a Purbeck stone wall the render is usually the problem rather than the answer, and we will say so before you spend anything.

The site visit is free and so is the written itemised quote. Thomas Hannen prices every job himself.

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Rendering in Langton Matravers is often about Purbeck stone, and often the job is taking a cement render off, not putting one on. Cement holds water in stone that needs to dry, so a cracked or hollow coat comes away by hand and goes back in lime, or the stone is left bare and repointed. Newer blockwork can take a silicone thin coat. Damp plaster inside a stone cottage is a plastering job, in lime.

The walls in the older part of Langton Matravers are Purbeck limestone, solid, laid in lime and with no cavity behind them. A wall like that sheds the water it takes in by evaporating it off its own face. Cover that face with a hard, plastic-rich render and the water goes looking for another way out, which is the inside of the room.

So the first visit is a look and a tap, not a sales call. Sometimes the answer is lime render put back properly, sometimes it is to strip what is there and repoint the stone instead, and on the newer houses at the edge of Langton Matravers a thin coat system is exactly right. You get the answer in writing, free.

The work in Langton

Taking cement off stone, and putting lime back

A house elevation part way through rendering, old finish on one side and new render on the other (illustrative photo for rendering in Langton Matravers)
Half and halfThe old finish on one side, the new system on the other. Illustrative photo.

Tapping comes before anything else. We work along a Langton Matravers elevation with a knuckle and a light hammer. Sound render answers dead, blown render drums, and the hollow area rarely matches the crack you can see from the lane. That survey is what the quote is built on.

Hacking off a cement render. On Langton Matravers stone this is slow, careful work. The render has to come away without taking the face of the stone with it, so it comes off in sections by hand rather than with a breaker. Then the wall is cleaned down, raked out where the joints have gone, and left to dry before anything else happens.

Lime render on solid walls. Anything pre-1919 in Langton Matravers is a period, solid wall and it wants a breathable lime render, softer than the stone it covers. It goes on in coats: a scratch coat keyed and left, a straightening coat, then a fine float finish. It cannot be rushed in cold weather, and it is the only thing that will not trap moisture in the wall.

Silicone thin coat and monocouche. On newer blockwork away from the old core of Langton Matravers, a polymer basecoat with a full mesh, a primer and a through-coloured silicone topcoat is the sensible specification. Monocouche gives the same through-colour in one material, in two passes scraped back the next day. Neither belongs on solid stone.

Sand and cement, pebbledash and Tyrolean. Plenty of the twentieth century walls in Langton Matravers carry traditional sand and cement, a dash finish or a Tyrolean flick. All three are repairable, and matched off a sample panel first.

Beads, bellcast and stop ends. A bellcast at the foot of a render throws water clear instead of onto the plinth. Stop beads finish it cleanly at a soffit or corner, angle beads keep a reveal true, and here the beads are stainless because salt eats galvanised steel from the edge inwards.

Cracking, delamination and staining. Map crazing is a surface fault, a crack running from an opening is movement, and render that has parted from the background drums whatever it looks like. Green algae on the seaward side is treated and cleaned down gently rather than blasted.

Render over external wall insulation. Where EWI boards go on the outside of a wall, the render is the weather face of that system. It goes over a render carrier board or the insulation itself, with a mesh basecoat and a thin coat over it, and every bead, sill and pipe is reset to the new thickness. On solid stone in a conservation area it is rarely the right thermal answer, and we will say so.

How it runs

Taking cement off stone and putting lime back on

A rendered bungalow elevation finished and cleaned down, with beads and stop ends in place (illustrative photo for rendering in Langton Matravers)
Beads and stop endsWhere the render stops is where it is judged. Illustrative photo.

Thomas goes along each wall knocking the render to hear where it has come away, and prices the job himself. Where a stone wall has been given a hard cement render, the better answer is often to strip it and go back to lime, or to leave sound stone showing.

Close to the sea in Langton Matravers, the south west and seaward walls take the brunt, so those get the most attention. The written quote covers scaffold, protection, stripping and preparation, which render and how many coats go on, beads and stop ends, and making good.

Thomas stays your contact on a Langton Matravers job while the scaffold goes up and the wall is stripped, rendered and finished. Glass, doors and paths are covered. Each lime coat is shielded from frost, strong sun and drying wind, and the scaffold stays up until the final coat has cured. Rubble goes off site every day. If the stone behind turns out loose or saturated, the job halts until you have seen a photo of it and a price for the fix.

Changing the material, texture or colour of a render is controlled in a conservation area, so check with Dorset Council whether your street falls in one. Listed houses need listed building consent even for what looks like a repair. Planning Portal guidance on external walls covers the ordinary position on an unlisted house, and Approved Document L brings insulation in when a whole elevation is renewed.

Cost

The hollow patches behind old render set the price

Render is not priced per square metre. What is on the wall now, and what the wall is, decide it.

What comes off. Cement render or pebbledash on stone has to be taken off slowly, or the face of the stone comes with it. Thomas taps the whole wall before quoting, because hollow patches set the hours.

The system. Lime suits stone that must breathe. Sand and cement, through-coloured monocouche, and thin silicone finishes over insulation boards each cost and behave differently, and salt air and driven rain on the seaward side affect which will last.

Access. A single-storey gable is reachable from a tower. A taller elevation needs scaffold for the whole system, priced under the work at height rules.

Details. Bellcast beads, stop ends, reveals, sills and refitting pipes all take time.

Leaving stone bare. Where good stone is left showing instead, the joints usually need raking out and repointing in lime, and that is priced as its own line. It is often the cheaper and better answer on a stone cottage.

Ask another firm whether the old render comes off or is overlaid, which system and how many coats, whether beads and bellcast are included, and whether scaffold is in the price.

If it has started to come away

Render lifting off a stone wall after a hard winter

Phone instead of using the form if render has started to lift, rings hollow when knocked, or has cracked open wide. Rain gets in behind, and frost then levers it off. On stone, never let anyone tug at render that is coming away, because it takes the face of the stone with it.

On the first visit we make the loose section safe, and put a sheet over it if more bad weather is due. Once we know how far the hollow area extends, the elevation is priced. Scheduled work is Monday to Friday, 8am to 6pm. A message left on the phone gets a reply as soon as we are free.

Call now: 07435 839745

Worth knowing

Just over a mile from the sea, and it shows on one wall

The village sits just over a mile back from the cliffs, on ground that runs down to it, and the weather comes off the sea from the south west. The seaward face of a render takes the brunt of it.

Salt keeps a surface damp for longer between showers, so the seaward elevation never gets the drying spell the sheltered side gets and algae takes hold there first. Salt also corrodes metal, which is why a galvanised bead on a seaward wall rusts and pushes the render off along the arris while the rest of the elevation is sound.

So on a house in Langton Matravers the two elevations are not the same job and should not be priced as one. The seaward wall gets stainless beads, a specification chosen for driven rain rather than looks, and a finish that can be washed down rather than repainted. The sheltered side often needs nothing at all. A quote covering the whole house without anybody having walked round it has missed the one thing here that changes the work.

Who you are dealing with

Rendering from Harmans Cross down to Swanage

The drive from our Boscombe base is 11.2 miles. We render houses in the village and in Harmans Cross, Kingston, Worth Matravers and Swanage, broadly BH19, and Dorset Council deals with planning for all of them.

The firm is Bournemouth Roofing & Building Ltd, company number 15471719, registered in England and Wales. Render is tapped and priced by Thomas Hannen himself, who owns the company. A verified Checkatrade review from a customer gives us 10 out of 10. You are not charged for the visit, or for the itemised quote he puts in writing. Before you book a visit in Langton Matravers, you can read our customers' Google reviews, word for word, on our reviews page.

Planning at a glance

Do you need planning permission in Langton Matravers?

Most repairs in Langton Matravers need no application at all. What decides whether a change to the outside of your house does is who the council is, whether a conservation area or a listing applies, and whether the place sits in a protected landscape.

The planning position in Langton Matravers, from council and national records.
Question In Langton Matravers
Who decides Dorset Council is the planning authority for Langton Matravers. Dorset Council's heritage pages set out what it controls.
Conservation area Yes: Langton Matravers Conservation Area 1, Conservation Area 2 and Acton Conservation Area 1 and 2. They cover parts of Langton Matravers, so check whether your street is inside one.
Listed buildings Yes, there are listed buildings in and around Langton Matravers. If yours is one, work can need listed building consent.
Protected landscape Inside the Dorset National Landscape (formerly AONB), so anything visible from outside gets more attention.

Questions

Questions about rendering in Langton Matravers

Should we render our stone cottage to keep the damp out?

Rendering a stone cottage in Langton Matravers does not usually keep the damp out. A solid stone wall dries through its face, and a hard render seals that face. The damp does not stop, it moves inside instead and shows above the skirting. If a wall is taking driven rain badly, repointing in lime and sorting the rainwater goods does more than a render will.

Somebody rendered ours in cement years ago. What now?

Tap it: if it is sound and the inside is dry, leaving it alone is a fair answer. If it is drumming, cracked, or you have damp inside on that elevation, taking it off and putting lime back is the repair. It is slow work because the stone face has to survive it.

Are we allowed to change the finish in the conservation area?

Like for like is maintenance. Changing the material, the texture or the colour affects the appearance of the area, which is the thing a conservation area controls, so it is a planning question. We will tell you which side of that line a job sits on before you commit to anything.

Why is lime work slower than a modern system?

Far longer than a modern system, and that is by design. Each coat has to firm up before the next goes on, and the finished wall carries on curing for weeks. It cannot go on into a frost, so it is spring to autumn work, not midwinter.

Can you do thin coat render on a newer house in the village?

Yes, and on modern blockwork it is a good choice. Mesh reinforced basecoat, primer, then a through-coloured silicone topcoat scraped to whatever texture you pick. The colour is in the material, so a chip does not show white underneath and there is nothing to repaint.

Nearby, and next door

Rendering near Langton Matravers

Free quote

Find out whether that wall should be rendered at all

Thomas comes out, taps the elevation, and tells you honestly whether the answer is lime, a thin coat or leaving the stone alone. The visit and the written quote are free.