Hertfordshire · England
St Albans Gutter Sealing
Sealing leaking gutter joints, end caps, fascias, soffits and roofline trims for homeowners, landlords and businesses in St Albans. Fully insured, ARBOMaster approved and guaranteed for a year.
- Water running down the wall below the gutter
- Internal damp traced to a gutter joint
- Quick sealant fixes on gutters that didn’t last
FAQs for St Albans
Is St Albans in your area for gutter sealing?
Yes, St Albans is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear quote.
Do you work for landlords with property near St Albans station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can go on one quote. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover St Albans, along with the rest of our area.
What about gutters on a second or third storey?
Low gutters are simple to reach. For higher work, tell us about access and we will confirm what’s needed.
What guarantee comes with the job?
There’s a 12-month guarantee on every job, gutter and fascia work included.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply call 0345 464 0079 or email us.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures.
How we handle gutter sealing in St Albans
Water dripping from a gutter joint can stain walls and soak the ground below. Resealing the joint is often all it needs, as long as the gutter is sound. If you are dealing with earlier gutter repairs that have peeled off and wet patches on the wall under a gutter joint, we can put it right, whatever the surface.
Flats, offices and shops in St Albans have long runs of movement joints, cladding joints and roofline trims. A failed joint lets water behind the brick or render, where it often goes unnoticed for a while.
All our work comes with a 12-month guarantee, wherever you are in Hertfordshire.
- Place
- St Albans (AL1, AL3, AL4)
- Wider area
- Hertfordshire
- Guarantee
- One year on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
Towns and villages near St Albans
Other services in St Albans
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
How we quote for gutter sealing
We quote each job individually. These are the things that affect it:
- When we can work, for business premises
- The size of the job
- The old material and how stubborn it is
- How easy the joints are to reach
Combining jobs into one visit is generally more efficient than separate visits. We’ll give you a clear quote for the lot.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- If it’s domestic, commercial or a hotel
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
- Photos by email, if that’s easy
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or send us an email.
What gutter sealing looks like in St Albans
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. With historic houses such as Batchwood Hall (about 1.5 miles north-west) nearby, there’s older building stock in the area around St Albans as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
For site and facilities teams at buildings such as Loreto College, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. If you let a flat or house near St Albans station, a dripping gutter joint or loose fascia trim is easy to miss until damp shows inside.
St Albans is about 20 miles north-west of London, in Hertfordshire. Every kind of property in St Albans is covered for gutter sealing, old or new, large or small. The work is guaranteed for a year. Our area takes in 381 places across Hertfordshire, from the larger towns to small villages. There’s also a page for London, about 20 miles away.
Our applicators cover all of AL1, AL3 and AL4 for gutter sealing and the streets around it. That includes homes and businesses on Gabriel Square, Jubilee Square and Old London Road. Main roads around St Albans include the A414 and B651, which makes travel easy. If you are just outside St Albans, we cover Bernards Heath (1 mile north), Sopwell (1 mile south), St Stephens (1 mile south-west), Marshalswick (1 mile north-east) and Park Street (2 miles south). Larger places within reach include Watford (7 miles south-west), Hemel Hempstead (6 miles west), Stevenage (13 miles north-east), Welwyn Garden City (7 miles north-east), Harpenden (5 miles north) and Hitchin (14 miles north). Being one of Hertfordshire’s larger places, St Albans has homes, rented property and businesses of every kind.
Local landmarks in St Albans
We work in homes and buildings around Alban City School, The Horn pub and Verulam School and the streets around them. There’s a railway station in St Albans itself: St Albans station. A little further out are St Albans Musical Museum (0.5 miles north-east) and The Maltings (within half a mile west). The countryside around St Albans includes The Wick Local Nature Reserve and Verulamium Lake.
What the job involves on each surface
Garage door frames
Resealing a garage door frame keeps rain and draughts out.
Gutter joints
Joints between gutter lengths are the most common leak point. They’re cleaned out, dried and resealed.
How it works
We keep the work tidy and contained to the joints we are treating, so you can carry on as normal. Expect the work to take a few hours, depending on the number of joints and the access, and we tell you how long to leave it before we go. Where a business in St Albans needs to stay open, out-of-hours working can be arranged, while home visits are arranged within our normal working hours, Monday to Saturday.
- First we trace the drip and check the gutter is not damaged.
- We remove the old sealant and clean the joint.
- The joint is dried before sealing.
- A gutter sealant is applied to the joint.
- The gutter is checked and debris around the joints cleared.
How to prepare
- Mention any parking rules near the property
- Tell us about any previous sealing or DIY attempts
- Plan for the work area to be out of bounds to pets and children
Get a quote
If you are in St Albans and need gutter sealing, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
Read more
What happens if it’s left?
A dripping gutter joint keeps wetting the same patch of wall. Left, it can stain walls and lead to damp, so it’s worth sealing early. In a busy place like St Albans, a failed joint in a flat or office can send water into the space below, where it’s often found late and is bigger to put right.
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. We take all of that into account in your quote.
Why book with us
- An ARBOMaster approved applicator
- More than 20 years in sealant work
- Arbo and Everbuild products
- 4.9 on Google from 180+ five-star reviews
See our cost guide and what customers say.
What we are called out for in St Albans
Leaves and moss hold water in the gutter. Water that can’t drain works its way through a weak joint and drips through.
Look out for these signs:
- Rain getting in around a garage door
- Stop ends leaking at the end of a run
- Water running down the wall below the gutter
- Fascia boards with gaps between them
If you live in an older home near Church of St. Peter, an extension built onto an older house moves differently, and the joint between them takes the strain.
Comparing quotes
- Whether they seal over old material or remove it
- What insurance they hold
- Whether the sealant suits the joint
- Whether VAT is included