Wokingham · England
External & façade joints in Waltham St Lawrence, Wokingham
Sealing brickwork movement joints, render, cladding and façade joints for householders, landlords and businesses in Waltham St Lawrence. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Weathered mastic that no longer stretches
- Joints where the bead has come unstuck
- Weeds or debris growing in open joints
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
External mastic in Waltham St Lawrence
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where mortar or filler would crack. If you are dealing with leaking joints around cladding and façade panels and gaps where render, brick and frames meet, we can put it right, on joints between brick and frames, render & cladding joints and copings & trims alike.
Older homes in small places like Waltham St Lawrence may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water usually gets in.
Whatever the size of the job, you get the same 12-month guarantee in Waltham St Lawrence and across Wokingham.
- Location
- Waltham St Lawrence (RG10)
- Wider area
- Wokingham
- Cover
- 12 months on all our work
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the quote in Waltham St Lawrence
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How many rooms, windows or areas are involved
- Whether there’s mould to deal with
- When we can work, for business premises
- The product the joint needs
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we will go through it with you.
What we need to know
Before you ask for a quote, have a think about:
- Any access issues, like height or stairs
- Any previous sealing or DIY work
- A few pictures by email, if you can
- The problem you’ve noticed
Want a quote for external mastic? Please phone 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Do you need external mastic in Waltham St Lawrence?
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it can’t stretch and rips as the joint opens.
The problems people usually mention when they call include:
- Rigid filler in a joint that should flex
- Joints with sealant missing in places
- Sealant pulling away from one side of the joint
- Plants rooting in failed movement joints
Letting a property close to Twyford station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
What your quote should include
- When the joint can take water or movement
- What product goes in the joint
- Whether VAT is included
- What happens if the job turns out different
Why it’s worth doing now in Waltham St Lawrence
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost, so the damage spreads beyond the joint. In a small place like Waltham St Lawrence, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why book with us
- White, clear, grey or coloured to suit, where the product allows
- Sealant colour chosen to suit
- Over 20 years’ experience
- 12-month guarantee on every job
See our cost guide and our reviews.
What external mastic looks like in Waltham St Lawrence
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. With historic houses such as Harleyford Manor (about 4.7 miles north) nearby, there’s older building stock in the area around Waltham St Lawrence 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.
Homes close to Church of St Lawrence include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move. If you look after a building such as Waltham St Lawrence Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Waltham St Lawrence is about 4 miles south-west of Maidenhead, in Wokingham. Waltham St Lawrence gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Waltham St Lawrence is one of 35 places in Wokingham we cover for external mastic. You can also see our page for Reading, roughly 8 miles from Waltham St Lawrence.
Every address in RG10 is covered for external mastic, from the main roads to the quietest streets. External mastic is available to properties on The Street, Halls Lane and Broadmoor Road and the roads around them. Close by, we work in Kiln Green (1 mile north-west), Shurlock Row (1 mile south), Hungerford (1 mile south), The Holt (2 miles north-west) and Hare Hatch (2 miles west). Larger places within reach include Reading (8 miles west), Wokingham (6 miles south), Woodley (4 miles south-west), Earley (7 miles south-west), Crowthorne (8 miles south) and Lower Earley (6 miles south-west).
Near you in Waltham St Lawrence
Waltham St Lawrence’s nearest station is Twyford station, about 2.6 miles west of the centre. Other landmarks nearby include St Mark's Hospital (3.8 miles north-east). Green spaces nearby include Hurley Chalk Pit and Weycock Hill.
What the job involves on each surface
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. A primer goes on where the product requires one before sealing.
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Places near Waltham St Lawrence
More services for Waltham St Lawrence
When it isn’t the sealant
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Failed render or damaged cladding panels
- Cracking across the wall rather than at a joint
- Damp that is not coming from the joint
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Joints and surfaces we work on
- Copings & trims
- Façade panels
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames
What we do, step by step
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a handful of joints, longer for a whole elevation. Somewhere like Waltham St Lawrence needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Let us know about stairs, lifts or work at height
- Move anything stored near the joints
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you are ready, ring 0345 464 0079 or drop us an email.
Advice
FAQs for Waltham St Lawrence
Is Waltham St Lawrence in your area for external mastic?
Yes. Our work covers London and the South East, and Waltham St Lawrence is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Can you help a landlord with a rental near Twyford station?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear quote.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.
Can you reach joints on upper floors?
It depends on the building. We work on joints that can be reached safely. Give us some details and we’ll confirm the access.
Where do you work from?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
How long does the job take?
That depends on the amount of work, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We will tell you when we quote.