West of Scotland, the Monklands
Woodworm, wet rot and dry rot in Coatbridge
Coatbridge sits low, on ground that has been worked and filled for two centuries. That is why the timber problems here are so often about moisture that is coming from underneath rather than from above.
- We look before we priceNo quote without a survey
- Written reportSomething a lender will accept
- West of Scotland onlyGlasgow to Ayr and Stirling
The Monklands were built on iron and coal, and the ground shows it. Coatbridge grew around the works and the canal, sits low in the valley, and stands on land that has been mined, quarried, tipped and levelled over roughly two hundred years. Airdrie, a couple of miles up the hill, sits higher and drier and takes more of the weather instead.
That geography is the reason this page reads differently from the rest of the county. The general Lanarkshire picture, cavity walls, suspended timber floors and drains displaced by ground movement, is set out on theLanarkshire page and it applies here too. What Coatbridge adds is a persistent supply of moisture from below: high groundwater in the low ground, cellars and deep sub-floor voids that older Lanarkshire towns mostly do not have, and buildings whose timber has therefore never been properly dry.
Book a survey
Three questions. You do not need to know which problem you have.
Why woodworm is the headline here, and why it is really a damp problem
Of the three problems, woodworm is what people in Coatbridge search for most, and the usual explanation offered is the age of the housing. That is only half of it, and the other half is more useful to know.
Age determines whether the common furniture beetle is interested in your timber at all. It attacks the sapwood of untreated softwood, and a great deal of the roof and floor timber installed across the Monklands between the nineteen fifties and the mid seventies went in untreated. That is the same story as everywhere else in post-war Lanarkshire.
Moisture determines whether an infestation actually establishes and keeps going. Larvae do considerably better in timber carrying a raised moisture content than in timber that is genuinely dry, which is why a live problem is almost always localised: one floor void, one loft over a bathroom, the joists along the wall that has been wet for years. A house with a dry, ventilated roof space is a poor prospect for the beetle no matter what decade the trusses went in.
Put those together in a town where a lot of timber sits over damp ground and the pattern makes sense. It also points at the right fix. Where an infestation is live and the timber is damp, treating the timber without addressing why it is damp is treating half the problem. Thewoodworm page for the West covers what treatment involves, andhow to tell whether woodworm is active is the thing to read first, because most of what we are shown here is old damage that stopped long ago.
Cellars, sub-floor voids and ground water
Coatbridge has more below-ground space than people expect, and it is the first thing a surveyor here wants to see.
A cellar or a deep void in low-lying ground is a different proposition from a shallow ventilated void under a suburban floor. It can sit close to the water table, it is unheated, and it usually has minimal ventilation. The air in it stays humid more or less permanently. Anything timber in contact with that space, a floor structure over it, joist ends bedded into its walls, an old timber stair, a lintel, is never given the chance to dry out.
Wet rot in that situation is routine. Dry rot is the one that costs money, because still, humid, enclosed conditions are precisely what it needs to get established and then travel through masonry to reach more timber elsewhere in the building. This is the main reason we will not price this kind of job from a description. Somebody has to get down there with a light and see how far it has gone. Thedry rot page explains why the repair has to reach well past the visible damage.
Ventilation is the cheap half of nearly every fix here.Getting air moving through a void or a cellar will not reverse decay that has already happened, and it is not a substitute for repairing whatever is letting water in. But a void that is ventilated dries, and dry timber is hostile to all three problems at once: rot stops, and beetle larvae do badly. Clearing blocked airbricks, opening up a sealed cellar hatch and making sure a driveway or border has not buried the vents costs almost nothing and is worth doing before anybody is asked to quote for anything.
The older stock, and where the expensive jobs are
Coatbridge and Airdrie both keep a core of Victorian and Edwardian sandstone tenement and terrace around their centres, at Whifflet, Old Monkland, Coatdyke and the older Airdrie streets. Solid walls, no cavity, joists built into the stone, and rainwater goods shared between the owners in a flatted building. Those are the properties where a failed hopper or a split downpipe turns into a serious dry rot outbreak, and they produce a share of the expensive work out of all proportion to how much of the housing they represent.
In a flatted building the roof and the rainwater goods are almost certainly common property, so the repair is a shared decision even though the rot may be in your flat alone. That does not stop you finding out where you stand: a written survey is a document you can put in front of the other owners, and it tells you whether the decay has already reached timber that is yours to deal with by yourself.
Where we cover in the Monklands
Coatbridge and Airdrie, with Bargeddie, Glenboig, Chryston, Moodiesburn, Caldercruix, Plains and Calderbank on the same terms. It is a routine run for the West of Scotland team rather than an outlying one, andMotherwell, Wishaw and Bellshillare covered from the same base.
Two things are worth telling us when you enquire, because both send the surveyor somewhere specific: whether the property has a cellar or any below-ground space, and whether the problem is at the bottom of the building or at the top. If you cannot tell which of the three problems you are looking at, book a timber survey and have all three looked at in one visit.
Questions we get from Coatbridge and Airdrie
Why would woodworm be about damp? I thought it was about the age of the wood.
Age decides whether the beetle is interested at all, because it goes for the sapwood of untreated softwood. Moisture decides whether an infestation gets going and keeps going. Common furniture beetle larvae do far better in timber that is damp than in timber that is properly dry, which is why the classic finding is not a whole house but one floor void, one loft, or the joists along one wall. In this part of the Monklands there is a lot of timber sitting at a raised moisture content because of where the buildings are and what is under them, and that is the difference between old holes and a live problem.
We have a cellar. Is that unusual round here?
It is commoner in Coatbridge than in most of Lanarkshire, and it changes the survey. A cellar or a deep sub-floor void in low-lying ground can sit close to, or at times below, the level of the surrounding groundwater. That means damp that is not coming from a leak you can find and stop, it is coming from the ground. Timber built into or over that space, joist ends, a floor structure, an old stair, is then in permanently humid air with almost no ventilation. It is exactly the condition dry rot needs, and it is why a cellar is the first place we want to look rather than the last.
Is Airdrie the same as Coatbridge for this?
Related but not identical, and the difference is the ground. Airdrie sits noticeably higher and more exposed, so it takes more wind and driven rain but drains better. Coatbridge sits lower, with the canal and the water course through it, and holds moisture in the ground for longer. In practice that means more weather-driven problems on Airdrie’s exposed elevations and more persistent ground-related damp in Coatbridge. Both towns are covered on the same terms and most of this page applies to either.
The loft has holes in the timber but the house is from the sixties. Do we treat it?
Not until somebody establishes whether anything is still living in it, and the age of the house does not answer that. Post-war roof timber was frequently untreated softwood, so holes in a nineteen sixties loft are unremarkable and very often historic. What matters is whether the holes are fresh and pale with soft dust below them, and whether the loft is damp enough to sustain activity. A loft that has been dry for thirty years usually is not. Treating timber that has nothing living in it changes nothing about the timber and costs you the price of the treatment.
Does the old industrial ground affect the building itself?
Mainly through drainage, which is the same story as the rest of Lanarkshire. Ground that has been mined, tipped or filled settles unevenly, and what settles with it is the underground drainage, the gullies and the paths. A drain out of line or a gully sitting low discharges water into the ground beside the wall rather than into the pipe, and that keeps masonry wet indefinitely. It is unglamorous and it is behind a large share of the rot we find here.
Book a survey
Three questions. You do not need to know which problem you have.