Cast-iron gutters on Glasgow tenements: restore or replace?
If you live in a Glasgow tenement, there is a good chance the gutters and downpipes on the front and back are cast iron. They have been there a long time. Eventually, you will be asked whether to mend them or put new ones up.
This post goes through how to decide, and what is different when the building is shared.
Why tenements have cast iron
Cast iron was the standard material when most tenements were built. It is strong and heavy, and it takes a lot of weather. It also looks right on sandstone, which is why many owners want to keep it.
The same weight is its weak point. A long run of full, wet cast iron is very heavy, and the brackets holding it to the wall carry all of it, four storeys up.
When restoring makes sense
Cast iron that is dirty, flaking or rusted on the surface can often be saved. The work is the sort of thing you would expect:
- Clear the gutter and downpipe.
- Strip loose paint and rust back to sound metal.
- Treat the metal and prime it.
- Repaint, and reseal the joints.
If the metal underneath is thick and sound, this can give you many more years. It also keeps the original look of the building, which matters to many owners and to some conservation requirements.
When replacing is the better call
- Holes or thin, flaking metal: rust that has gone through cannot be painted over.
- Cracked sections: cast iron is brittle and does not mend well once split.
- Brackets pulling out of the stone: the fixings may need redoing, not just repainting.
- Joints that leak again and again: the run may have moved too much to stay sealed.
Replacing can be like for like, in cast iron, or in another material. Some tenements will need to stay in cast iron, so check the position on your building before you decide. Our overview of gutter materials compares the options.
Getting to four storeys safely
This is where tenement work differs from a house. Four storeys is too high for a ladder, and it should not be done from one. We work from a tracked access platform, which reaches up to four storeys and sits securely on the ground.
It also lets us see the gutters up close before anyone gives you a price. You can read more about this kind of work in our tenement gutter repairs in Glasgow.
Shared buildings and shared costs
In a tenement, the gutters usually belong to the building and not to one flat. That means the repair is normally a shared one. How that works depends on your title deeds and on how your owners decide things, so we cannot tell you who owes what.
What we can do is make the job easy to agree on:
- We photograph the faults, so everyone sees the same thing.
- We describe the options in plain words: restore, replace like for like, or replace in another material.
- We give one quote for the whole job, so the owners can compare it.
Your property manager or factor, if you have one, can tell you how your building deals with common repairs.
Keep the iron clear
Whatever you decide, keep the gutters clear. Moss and silt hold water against old iron, which is the quickest way to rust it from the inside. Regular tenement gutter cleaning is far cheaper than a restoration.
Gutters on tall buildings are often only noticed when they fail. If you can see green growth coming out of the top, or staining below a joint, that is the moment to ask for advice. Ring us with what you can see, and we will tell you whether it sounds like a clean, a restoration or a replacement.
Questions owners ask
Can one bad section be replaced on its own?
Often yes, if the rest of the run is sound. The new section has to match the old one in shape and fit properly at the joints.
Will new gutters look different from the old ones?
Like-for-like replacement looks very close to the original. A different material changes the look, so decide that before work starts.
How do I know whether the brackets are the problem?
If the gutter sags or leans away from the wall, or you see gaps where the bracket meets the stone, they are worth checking. Photos from close up help a lot.
A simple way to decide
- Sound metal, tired paint: restore.
- Holes, splits, or loose brackets: replace the affected parts or the run.
- Not sure: get it cleaned and looked at from close up first.
If you are weighing the same question for a modern house, read our post on repairing or replacing gutters.