Milton Keynes · England
External Mastic in Aspley Guise
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Aspley Guise and across Milton Keynes. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Joints with sealant missing in places
- Sealant that has lost its bond to the brick or render
- Failed seals between different materials
Why act early in Aspley Guise
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. Around Aspley Guise, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why choose Mr Mastic in Aspley Guise
- Colour picked to suit the job
- More than 20 years in sealant work
- White, clear, grey or coloured to suit, where the product allows
- Experience in homes, commercial sites and hotels
See our cost guide and customer reviews.
About our external mastic in Aspley Guise
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing. If you have weathered mastic that no longer stretches and weeds or debris growing in open joints, we can put it right, whatever the surface.
Outside joints can only be sealed when they’re dry, so work in Aspley Guise is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Aspley Guise (MK17)
- Wider area
- Milton Keynes
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
Sealant isn’t the answer to every problem, and we’ll tell you before work begins. Sealant won’t put right:
- Subsidence or other structural problems
- Rising or penetrating damp from elsewhere in the wall
- Loose or hollow render, which needs re-rendering
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Joints and surfaces we work on
- Joints between brick and frames
- Copings & trims
- Façade panels
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
Also near Aspley Guise
What else we do in Aspley Guise
What happens on the day
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. It normally takes a few hours to a few days, depending on the length of joint and the access. Somewhere as small as Aspley Guise, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Move anything stored near the joints
- Plan for the work area to be out of bounds to pets and children
Get a quote
For external mastic in Aspley Guise, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Related advice
Common problems we fix in Aspley Guise
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint.
Signs it’s time to call us include:
- Gaps where render, brick and frames meet
- Failed sealant between panels on a façade
- Movement joints with cracked, split or missing sealant
- Plants rooting in failed movement joints
For an older house near a landmark such as Church of St Botolph, an extension built onto an older house moves differently, and the joint between them takes the strain.
Questions to ask before you book
- Whether VAT is included
- What preparation is included
- How hidden problems are handled
- Whether they seal over old material or remove it
Your questions about external mastic in Aspley Guise
Can you help a landlord with a rental near Aspley Guise station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or email us with the details for a clear quote.
Do you cover Aspley Guise for external mastic?
Yes, Aspley Guise is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we will give you a clear quote.
Do the sealants smell?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only, which would stop it stretching.
Is there a guarantee?
Yes. Every job comes with our 12-month guarantee.
Can a movement joint be filled with mortar?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose. We will reseal it with a flexible sealant.
How do I get a quote for external mastic in Aspley Guise?
Size, access and the old material all affect the cost. Ask us for a quote.
Is it messy?
No. The area is protected while we work and cleaned up afterwards.
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
Looking after it afterwards
After the cure time, these simple habits help:
- Keep water from gutters off the wall
- Keep soil, plants and ivy away from the joints
- Get split or bare joints resealed while the damage is small
- Keep high-pressure jets off the joints
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead and let water in behind.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
External mastic in Aspley Guise: local notes
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 Woburn Abbey (about 2.5 miles south-east) are a reminder that the area around Aspley Guise has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
If you look after a building such as Aspley Guise Lower School, its movement joints, gutters and trims need looking after like any other building’s. Letting a property close to Aspley Guise station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Aspley Guise is about 5 miles east of Bletchley, in Milton Keynes. Aspley Guise gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across Milton Keynes, we cover 73 places, and Aspley Guise is one of them. There’s also a page for Oxford, about 31 miles away.
Here we cover the MK17 postcode area for external mastic. Local streets include The Square, Wood Lane and The Mount, all of which we cover. Other places close to Aspley Guise include Aspley Heath (1 mile south-west), Woburn Sands (1 mile west), Lower End (1 mile north), Hulcote (2 miles north-east) and Wavendon (2 miles north-west). Further out, we also cover Milton Keynes (6 miles west), Bletchley (5 miles west), Newport Pagnell (6 miles north-west), Bletchley and Fenny Stratford (4 miles west), Furzton (6 miles west) and Whitehouse (8 miles west).
What’s near Aspley Guise
We work in homes and buildings around The Bell Public House, among other places. For rail, the closest station is Aspley Guise station, about 0.7 miles north. Other landmarks nearby include Woburn Heritage Centre (1.6 miles south) and Rugemont Castle (2.5 miles north-east). Not far away are Heydon Hill and Caldecotte Lake.
Different surfaces, different methods
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. The old joint is removed and a sealant that bonds to both sides goes in.