Scotland
External Mastic in Renfrewshire
From the largest town to the smallest village in Renfrewshire, our applicators can help with external mastic. A clear quote before we start, and a one-year guarantee.
Towns we cover in Renfrewshire
Sealing brickwork movement joints, render, cladding and façade joints. Choose your town from the list to see local details, or call or email us for a quick quote.
Larger towns
More services in Renfrewshire
- Glazing & conservatory sealant
- Commercial & hotel sealant
- Sand mastic for sash & case windows
- Window & door mastic
- Remedial sealant & repairs
- Gutter, fascia & soffit sealing
- Bathroom & kitchen resealing
- Floor & skirting joints
- Fire-rated sealant
- New-build mastic & snagging
- Regrouting
Postcode areas we cover
External mastic across Renfrewshire: what to expect
A movement joint is a deliberate break that lets a wall expand and contract. Its sealant has to flex with the building, season after season, so once it splits or hardens, the joint stops working and water gets in. Common call-outs are for failed sealant between panels on a façade and cracked joints where brick meets render or frames, on concrete & block, render & cladding joints and brickwork movement joints.
On the day, we start by going over the job with you. Surfaces next to the work are protected before work begins. The work usually takes a few hours to a few days, depending on the length of joint and the access.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Pricing in Renfrewshire
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
- Sanitary silicone with an anti-fungal additive in wet areas
- We agree the colour with you first
- 180+ five-star Google reviews
- Every job guaranteed for a year
Ask for a quote
Asking for a quote is easy: let us know what needs doing and where and its rough size. Photos by email help us understand the job.
Local landmarks in Paisley
Locally, jobs take us to homes and businesses close to Castlehead High School, St Luke's Church and Gallows Green and the streets around them. Paisley has its own railway station: Paisley Canal station. Well-known places in the area include Riccartsbar Hospital (under half a mile west) and Paisley Museum (0.6 miles north). Green spaces nearby include Walls Loch and Neilston Pad.
Outside joints across Renfrewshire
In Renfrewshire, external mastic work takes in houses, flats and commercial buildings, from Paisley, Renfrew and Johnstone to the quieter places in between. Outside joints can only be sealed when they’re dry, so the work is planned around the weather.
Scottish weather is hard on outside joints, especially in the wetter west, while generally soft water means less limescale indoors but no less mould. Sealants for jobs in Renfrewshire are chosen with that in mind. Renfrewshire includes coastal places, where outside joints face more wind, rain and salt than they would inland. Walls facing the sea are generally the first to need attention.
Paisley: For landlords with property near Paisley Canal station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. If you live in an older home near St Luke's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Landlords, agents and businesses in Renfrewshire
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can go on one quote.
Letting agents and landlords in Renfrewshire can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Common problems we fix in Renfrewshire
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Common reasons people contact us are:
- Weathered mastic that no longer stretches
- Movement joints filled with mortar instead of sealant
- Weeds or debris growing in open joints
- Joints with sealant missing in places
How to look after the new joints
A little care helps the new joints last. We recommend:
- Ask before painting over external sealant
- Make sure movement joints are not pointed over
- Get split or bare joints resealed while the damage is small
- Tell anyone working on the walls about the movement joints
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead and let water in behind.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
Different surfaces, different methods
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it so the sealant isn’t too deep.
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
Your questions about external mastic in Renfrewshire
What does external mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, email us at info@mrmastic.co.uk with a short description of the job.
I rent my home. Can I book you?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
How do you reach high-level joints?
That depends on the building and the joints. We work on joints that can be reached safely. Tell us about the building and we will confirm what access is needed.
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 use backing rod?
That’s backing rod, a closed-cell foam. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
Should I try DIY first?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Can you do several jobs on one visit?
Yes, and it often makes sense. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.