Buckinghamshire · England
Little Marlow External Mastic
Problem with your movement joints in Little Marlow? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Weeds or debris growing in open joints
- Sealant pulling away from one side of the joint
- Failed seals between different materials
Looking after it afterwards
After the cure time, these simple habits help:
- Fix overflowing gutters above sealed joints
- Leave the joints unpainted unless we have said otherwise
- Keep movement joints as flexible joints, not mortar
- Have failed joints looked at early
Keep pressure washers away from the sealant. High-pressure water can lift the edges over time.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
About our external mastic in Little Marlow
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the line blends in. We work on copings & trims, concrete & block and render & cladding joints, and common reasons people get in touch are sealant that has lost its bond to the brick or render and joints pointed up with cement by mistake.
In a village or hamlet like Little Marlow, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Little Marlow (SL7)
- Wider area
- Buckinghamshire
- Guarantee
- One year on every job
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
Sealing over the top of old mastic does not hold for long. New sealant does not bond well to old, weathered sealant, so the old joint is cut out fully first. In a small place like Little Marlow, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why Little Marlow clients choose us
- Anti-fungal sanitary silicone in wet areas
- A 12-month guarantee on all work
- Approved under the ARBOMaster scheme
- You choose the colour before work begins
See how sealant jobs are priced and our reviews.
Towns and villages near Little Marlow
Also in Little Marlow
Can I do it myself?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Surface by surface
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it or an approved alternative. Send us any details you have about the façade.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap and keep the sealant to the right depth.
What we cannot put right
Sealant is not the answer to every problem, and we’ll tell you before work begins. Sealant will not put right:
- Render that is blown, hollow or coming away
- Rising or penetrating damp from elsewhere in the wall
- Cracked brickwork or render that needs a builder or plasterer
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before booking.
Where we work in Little Marlow
- Concrete & block
- Render & cladding joints
- Façade panels
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
Little Marlow buildings and the weather
With historic houses such as Cliveden (about 2.9 miles south-east) nearby, there’s older building stock in the area around Little Marlow as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like Little Marlow CofE School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. If you live in an older home near Church of St John the Baptist, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Little Marlow is about 2 miles north-east of Marlow, in Buckinghamshire. If you need external mastic in Little Marlow, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We are based in Crawley and cover Buckinghamshire. Across Buckinghamshire, we cover 263 places, and Little Marlow is one of them. There’s also a page for Reading, roughly 14 miles from Little Marlow.
Jobs for external mastic in SL7 is quoted and booked the same way as anywhere else. You’ll find streets such as Church Road, Pound Lane and School Lane, and we cover them all. If you are just outside Little Marlow, we cover Fern (1 mile north-east), Coldmoorholme (1 mile east), Well End (1 mile east), Burroughs Grove (1 mile north-west) and Bourne End (1 mile east). We also work in nearby towns such as High Wycombe (3 miles north), Chesham (10 miles north-east), Amersham (9 miles north-east), Beaconsfield (4 miles north-east), Chalfont St Peter (8 miles east) and Princes Risborough (10 miles north).
What’s near Little Marlow
Around Little Marlow, our work takes us to homes and buildings near The Queen's Head pub and Great Marlow School. The closest station to Little Marlow is Bourne End station, roughly 1.4 miles east. A little further out are High Wycombe Castle (3.3 miles north) and Eden (3.2 miles north). For a walk, there’s Taplow Lake and Warren Nature Reserve.
The process
Once we’re on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from a few hours to several days, depending on the building. Somewhere as small as Little Marlow, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about parking restrictions
- Mention any sign-in or site rules at work premises
Getting a quote
Need a quote? Please call 0345 464 0079 or drop us an email with a few details. We will explain what we’d do and give you a clear price before we start.
Read more
Common problems we fix in Little Marlow
Sometimes a movement joint was filled with mortar or a rigid filler. The joint cannot move, so the wall cracks somewhere else instead.
These are the problems we are asked about most:
- Joints pointed up with cement by mistake
- Hard, crazed mastic that has stopped moving
- Gaps where render, brick and frames meet
- Joints where the bead has come unstuck
Letting a property close to Bourne End station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Questions to ask before booking
- Whether all the old sealant comes out first
- Is VAT in the price?
- How long the guarantee is
- Who turns up on the day
FAQs for Little Marlow
Do you work for landlords with property near Bourne End station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
Is Little Marlow within the area you cover?
Yes. Little Marlow is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work at height?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher ones, send details and we’ll confirm the access.
Do I need to be at home?
If the work is inside, we need someone to let us in. Once we have agreed the job, you don’t need to watch us work.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
What does external mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before we start.
Is it OK to fill a movement joint with cement?
No. A mortar-filled joint can’t move, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
How long should I leave it?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint.