Buckinghamshire · England
Sand Mastic in Lamport
Specialist sand mastic for Lamport: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Failed mastic on an exposed elevation
- Draughts and rain around sash boxes
- Modern sealant on a period surround
Questions from Lamport
What guarantee comes with sand mastic in Lamport?
Every job comes with our one-year guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Will you come out to Lamport?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Where are you based?
We are based in Crawley, and we work across South East England, London and Scotland.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
Is sand mastic better than silicone for my windows?
It depends on the window. Period windows in stone or brick usually suit sand mastic, while modern frames normally get a flexible sealant.
Which products do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
About our sand mastic in Lamport
We work across Lamport renewing sand mastic on sash windows and doors. Every joint is cleaned out and filled by hand, finished to suit the masonry. If you’re dealing with failed mastic on an exposed elevation and old cement repairs round a window that have failed, we can put it right, whatever the surface.
Outdoor sealant needs dry, clean surfaces, so work on frames around Lamport is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Big or small, it’s backed by our one-year guarantee in Lamport and across Buckinghamshire.
- Location
- Lamport (MK18)
- Region
- Buckinghamshire
- Cover
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What sand mastic looks like in Lamport
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Stowe House (about 0.9 miles west) are a reminder that the area around Lamport has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Schools such as Akeley Wood Senior School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Lamport is about 2 miles north of Buckingham, in Buckinghamshire. If you need sand mastic in Lamport, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We cover Buckinghamshire from our Crawley base, Lamport included. Lamport is one of 263 places in Buckinghamshire we cover. Oxford is on our list too, about 22 miles from Lamport.
We work across MK18 for sand mastic and the streets around it. Nearby, we also carry out sand mastic in Akeley (1 mile east), Maids Moreton (1 mile south-east), Lillingstone Lovell (3 miles north-east) and Leckhampstead (3 miles east). Further out, we also cover Haydon Hill (15 miles south-east), Winslow (8 miles south-east), Steeple Claydon (6 miles south), Tingewick (3 miles south-west), Whitchurch (12 miles south-east) and Quainton (11 miles south).
Local landmarks in Lamport
We work in homes and buildings around Buckingham School, Stowe Park and Garden and The Queen's Head pub. Nearby you’ll also find The Menagerie (0.9 miles west) and Buckingham Castle (2.2 miles south). Open spaces near Lamport include Buckingham Sand Pit.
When to call us in Lamport
Shallow joints are a common cause. A thin layer doesn’t hold well, which is why we pack deep voids first and get the depth right.
People usually contact us after spotting something like this:
- Gaps where the frame meets the masonry
- Silicone on a period window that looks wrong
- Mastic worn away on windows facing the weather
- Old cement repairs round a window that have failed
For an older house near a landmark such as Parish Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What to look for in a quote
- How the colour is chosen
- Which sealant they’ll use, and why
- How much experience the applicator has
- The length of the guarantee
Places near Lamport
More services for Lamport
Why deal with it now?
New sash windows are a major, costly change, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. Older cottages and farmhouses around Lamport can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why us?
- Approved under the ARBOMaster scheme
- Old sealant always removed completely
- Domestic, commercial and hotel work
- One-year guarantee on every job
Take a look at how sealant jobs are priced or what customers say.
How the visit works
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes a few hours per window, depending on the condition of the joints, depending on the size of the job. Somewhere as small as Lamport, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Move anything stored near the joints
- Plan for the work area to be out of bounds to pets and children
Getting a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved and give you a clear price.
Advice
Surface by surface
Brick reveals
Loose mastic comes out and deep gaps are packed before the new mastic goes in.
Timber door frames
Door frames get knocked and soaked, so their mastic can fail sooner. It’s renewed by hand.
How we quote for sand mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Access and height
- The size of the job
- Working hours on commercial sites
- The number of rooms or windows
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Access, such as stairs, a lift or height
- If it’s domestic, commercial or a hotel
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
If you are in Lamport and need sand mastic, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.