West Berkshire · England
External & façade joints in Upper Lambourn, West Berkshire
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Upper Lambourn and across West Berkshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Panel joints letting water in
- Moss and dirt in joints with no sealant left
- Rigid filler in a joint that should flex
Aftercare tips
Looking after new joints is easy, and it makes a real difference:
- Get split or bare joints resealed while the damage is small
- Keep water from gutters off the wall
- Point out the joints to other trades
- Never let anyone fill a movement joint with mortar
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years, so it’s worth resealing at the first signs.
About our external mastic in Upper Lambourn
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it, and we do not skip that step. We work on render & cladding joints, copings & trims and brickwork movement joints, and common reasons people get in touch are old sealant gone brittle and cracked and joints with sealant missing in places.
External sealant needs dry, clean surfaces, so work around Upper Lambourn is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
Every job is covered by a 12-month guarantee, wherever you are in West Berkshire.
- Location
- Upper Lambourn (RG17)
- Wider area
- West Berkshire
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
External mastic in Upper Lambourn: local notes
With historic houses such as Ashdown House (about 2.1 miles west) nearby, there’s older building stock in the area around Upper Lambourn as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Around Upper Lambourn, as everywhere, external mastic is only as good as the preparation behind it.
Upper Lambourn is about 7 miles south-west of Wantage, in West Berkshire. If you need external mastic in Upper Lambourn, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We cover West Berkshire from our Crawley base. Across West Berkshire, we cover 155 places, and Upper Lambourn is one of them. Our Oxford page covers work nearby.
Jobs for external mastic in RG17 is quoted and booked the same way as anywhere else. If you need external mastic at a property on High Street and Maddle Road or anywhere close by, we can help. Other places close to Upper Lambourn include Lambourn (1 mile south-east), Sheepdrove (2 miles east), Woolstone (5 miles north), Kingston Lisle (5 miles north) and Westcot (5 miles north). We also work in nearby towns such as Newbury (13 miles south-east), Thatcham (15 miles south-east), Speenhamland (13 miles south-east), Hungerford (8 miles south), Shaw (13 miles south-east) and Wash Common (14 miles south-east).
Near you in Upper Lambourn
We work in homes and buildings around The Malt Shovel pub. For a walk, there’s Seven Barrows and Rams Hill.
Nearby places to Upper Lambourn
What else we do in Upper Lambourn
What happens if it’s left?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render around the joint, so the damage spreads beyond the joint. Where a wall is exposed, as many are in small places like Upper Lambourn, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or send us an email and we’ll talk you through it.
What you get with us
- ARBOMaster approved applicator
- Anti-fungal sanitary silicone in wet areas
- Experience in homes, commercial sites and hotels
- Quality sealants from Arbo and Everbuild
What happens on the day
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. It generally takes anything from a few hours to several days, depending on the building. Somewhere as small as Upper Lambourn, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Clear items away from the joints we are working on
- Try not to wet indoor joints just before the visit
- For business premises, tell us about site rules or sign-in
Ask for a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved and give you a clear quote.
Related advice
Upper Lambourn questions
Can you do external mastic in Upper Lambourn?
Yes. Our work covers London and the South East, and Upper Lambourn is part of that. You can call 0345 464 0079 or email us and tell us what needs doing.
Is external mastic in Upper Lambourn guaranteed?
Every job comes with our one-year guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Is there any odour?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used.
How often do external joints need resealing?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Our work comes with a 12-month guarantee.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we’re using.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
When to call us in Upper Lambourn
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
Common reasons people contact us include:
- Old sealant gone brittle and cracked
- Gaps where render, brick and frames meet
- Plants rooting in failed movement joints
- Brick movement joints where the sealant has split
Historic houses such as Ashdown House, about 2.1 miles west, show how far back building around Upper Lambourn goes.
Questions to ask before you book
- Which colour the sealant will be
- Which sealant they’ll use, and why
- Are they insured?
- What preparation is included
What we can’t put right
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Walls that need new movement joints cut into them
- Cracked brickwork or render that needs a builder or plasterer
- Rising or penetrating damp from elsewhere in the wall
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer before booking.
Surfaces we seal
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Copings & trims
- Concrete & block
For landlords and businesses
We also work for property managers and facilities teams. We can quote a run of properties together.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.