Scottish Borders · Scotland
Longformacus New Build Mastic
Our applicators work in Longformacus on plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Gaps behind new kitchen upstands
- Messy sealant that spoils new finishes
- Cracked sealant around new window and door frames
About our new build mastic in Longformacus
Some owners wait for the first year’s movement before having joints redone. For small cosmetic gaps, that’s reasonable, but a failed shower or bath seal shouldn’t wait. We work on windows & doors, kitchens and show homes, and people most often call us about cracked sealant around new window and door frames and worktop and upstand sealant coming away.
Work in a place like Longformacus is planned ahead, journey included. Outdoor plot mastic needs dry weather, but indoor floor and skirting joints can be sealed whatever the forecast.
Whatever the size of the job, you get the same one-year guarantee.
- Place
- Longformacus (TD11)
- Region
- Scottish Borders
- Cover
- 12 months on all our work
- Quotes
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
What happens on the day
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours in a single home, and the area is left clean. For a place like Longformacus, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- First we work through your snagging list or plot schedule with you.
- Failed or untidy sealant is cut out completely.
- We clean off dust from the build and prime the surfaces where the product needs it.
- A sealant chosen for each area goes in and is tooled smooth.
- We check every joint and tell you how long each needs to cure.
How to prepare
- Try not to wet indoor joints just before the visit
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
Getting a quote
Need a quote? Please send an email to info@mrmastic.co.uk and tell us about the job. We will explain what we’d do and send you a clear quote before we start.
Related advice
What new build mastic looks like in Longformacus
Timber frame is common in newer Scottish homes, so skirting and sealant joints can open up as the building settles.
For jobs in and around Longformacus, choosing the right material for each joint is as important as a tidy finish.
Longformacus is about 15 miles south-east of Haddington, in the Scottish Borders. Jobs in Longformacus get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. 89 places in the Scottish Borders are on our list, large and small. Edinburgh is on our list too, around 29 miles away.
Every address in TD11 is covered for new build mastic. If you need new build mastic at a property on The Row, Duns Road and Gifford Road or anywhere close by, we can help. We also cover the places around Longformacus: Clockmill (5 miles south-east), Gavinton (6 miles south-east), Westruther (6 miles south-west), Preston (6 miles east) and Duns (6 miles east). Within a short drive, we also cover Kelso (14 miles south), Earlston (14 miles south-west), Lauder (12 miles south-west) and Chirnside (11 miles east).
Around Longformacus
Well-known places in the area include Langton Castle (4.5 miles south-east). The countryside around Longformacus includes Twin Law.
Your questions about new build mastic in Longformacus
Will you come out to Longformacus?
Yes, smaller places are covered as well as towns. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
Is Longformacus in your area for new build mastic?
Yes, Longformacus is within the area we cover. Our work covers the whole of Scotland. You can send an email to info@mrmastic.co.uk and tell us what needs doing, and we’ll give you a clear price.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
Do you work through snagging lists?
Yes. Send us the sealant items on the list, with photos if you can, and we’ll quote. We will flag anything that needs another trade.
How long does the job take?
A typical job takes a few hours for most snagging lists, longer for a run of plots, including the preparation. Your quote will say how long we expect yours to take.
What sealant work can’t fix
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Broken tiles or a split tray
- Movement caused by a poorly fitted tray or bath
- Cracking that points to a structural problem
If in doubt, send an email to info@mrmastic.co.uk and we will say what we think.
Where we work in Longformacus
- Skirting & floors
- Windows & doors
- Plot handovers
- Kitchens
- Bathrooms & en suites
- Show homes
For landlords and businesses
We also work for property managers and facilities teams. Several sites can go on one quote, and we’re fully insured for the work.
Landlords and agents in Longformacus can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
How we quote for new build mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- How easy the joints are to reach
- The product the joint needs
- How many areas need sealing
- How much old sealant there is and how hard it is to remove
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we’ll go through it with you.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- What’s wrong with the joints now
- Photos by email, if that’s easy
- If someone has resealed it before
- How many joints, rooms or windows are involved
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Surface by surface
Plot handovers
Good preparation at handover saves snagging later. We clean out building dust before sealing and primer used where needed.
Windows and doors
Draughts around new frames are often a sealant gap. We check and reseal the frame edges.
Places near Longformacus
What else we do in Longformacus
Common problems we fix in Longformacus
A new house holds a lot of water from the build, and it dries out over the first couple of years. Drying timber shrinks and pulls joints apart, and sealant that cannot keep up splits.
Any of these means the joints need attention:
- Internal frame sealant that has split
- Leaking shower tray seals in a new home
- Messy sealant that spoils new finishes
- Beads laid onto grit and dust from the build
In and around Longformacus, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Comparing quotes
- How the colour is chosen
- Are they insured?
- How long to leave it before use
- What product goes in the joint