Article date: 1 January 2026
Why this question is different in Edinburgh tenements
Most tenements are built with solid stone walls and traditional materials that manage moisture differently from modern cavity-wall housing. They are also exposed to wind, shared stairwells, and the day to day reality of lots of flats heating differently.
That mix is why “just add insulation” is not always the first move. Historic Environment Scotland’s guidance is blunt on this point: traditional buildings can be made warmer, but measures need to suit the building. Historic Environment Scotland
Draughts vs ventilation
This is where people get caught out.
A draught is uncontrolled cold air leaking in through gaps you did not choose. Ventilation is planned air movement that helps clear moisture and keep indoor air healthy. Energy Saving Trust makes the same distinction: ventilation is needed, draughts are not. Energy Saving Trust
In tenements, blocking “every gap you can find” can cause problems if it also removes the ways moisture escapes. The Centre for Sustainable Energy also warns against blocking purpose-made vents and flues, and flags kitchens and bathrooms as higher risk rooms if moist air cannot get out. Centre for Sustainable Energy
What draught-proofing usually fixes well
Draught-proofing is often the best first improvement in an Edinburgh tenement because it targets the big comfort killers without changing the building fabric much.
Historic Environment Scotland points to the usual suspects: windows, doors, loft hatches, and even unused chimneys in traditional properties. Historic Environment Scotland
In real tenements, the most noticeable wins are often:
- Sash-and-case windows that rattle or leak air around the staff bead and meeting rails
- Gaps at the front door, especially where the stair is wind-tunnel cold
- Chimneys that pull warm air up and out when not in use
- Floorboard gaps that let cold air wash across the room
You do not need a perfect seal everywhere. You need a planned seal that still respects ventilation and safety.
If your flat has the classic sash-and-case setup, it is worth reading Historic Environment Scotland’s notes on reducing heat loss from sash windows. It focuses on improving performance while keeping traditional joinery in mind. Historic Environment Scotland
What insulation is brilliant for in tenements
Insulation is not the villain. It is just more dependent on context.
In many tenements, insulation works best where the risks are lower and the gains are steady:
- Lofts and roof spaces (top-floor flats benefit most, and it is usually the simplest place to improve thermal performance)
- Suspended timber floors (common in ground floor and some basement-level flats, where cold air moving below the boards can make rooms feel harsh)
- Pipework and services (done sensibly, as part of wider upgrades, not as a random patch)
Historic Environment Scotland’s insulation guidance covers roofs, floors and walls, and treats them as different problems rather than one big “insulation job”. Historic Environment Scotland
Where insulation in tenements can go wrong
This is the part that needs calm honesty.
Solid wall insulation, especially internal wall insulation, changes how moisture and heat move through a wall. Historic England highlights the need to consider traditional construction, condition, and technical risk before insulating walls. Historic England
Scottish flat owners also have a practical layer to deal with. Under One Roof notes that traditional solid walls often perform better than people assume, and suggests prioritising other measures first because wall insulation is disruptive and can carry condensation risk if handled poorly. underoneroof.scot
You do not need to be an expert in building physics to take the point: if a wall is already wet, or becomes wet because of how it is insulated, the flat will not feel better.
A sensible order of improvements for most tenement flats
There is no one-size plan, but a safe pattern shows up again and again in guidance and in real projects.
A typical “low regret” order is:
First, deal with water and maintenance. Overflowing gutters, cracked render, failing pointing, and damp patches need addressed before you trap anything behind new layers. Stirling City Heritage Trust makes the same point: good fabric maintenance is a prerequisite for energy improvements. stirlingcityheritagetrust.org
Next, reduce uncontrolled draughts while keeping intentional ventilation in place. Energy Saving Trust
Then, insulate the easier, lower-risk elements like lofts and, where appropriate, floors. Historic Environment Scotland
Only then, think carefully about wall insulation, and treat it as a designed intervention rather than a quick add-on. underoneroof.scot
The “cold but dry” flat vs the “cold and damp” flat
Two Edinburgh flats can feel cold for totally different reasons.
If a flat is cold but dry, the biggest win is often stopping draughts and improving controllable heat retention.
If a flat is cold and damp, the priority is usually moisture control first: ventilation, heat balance, and fixing sources of damp. Otherwise you can end up insulating a problem in place.
If you are seeing recurring condensation, mould at corners, or a bathroom that never quite dries, it is worth looking at Ventilation in Edinburgh Homes page. That page explains common causes we see in Edinburgh flats and the practical options that tend to help.
What “good practice” looks like now
PAS 2035 provides a whole-dwelling framework for work delivered through schemes that require it; it is not a universal legal prerequisite for every privately arranged home improvement. A homeowner considering retrofit should ask an appropriately qualified retrofit coordinator or building surveyor which framework applies. BSI
You do not need to memorise the standard. The useful takeaway is simple: the right improvement depends on the whole dwelling, not just one cold wall.
Tenement realities people forget to plan for
A few Edinburgh-specific details make a real difference:
Shared stairs and drafts at the common entrance can undo improvements inside one flat.
One neighbour’s drying habits, extractor fans, or heating pattern can affect humidity levels in the stair and sometimes in adjoining walls.
Permissions can matter. Secondary glazing, window changes, and external alterations may need sign-off in conservation areas or for listed buildings. Historic Scotland’s window guidance also flags the role of planning authorities and consents. Aberdeenshire Council
If you are planning wider work in an older flat, our Tenement Renovations Edinburgh page is a sensible next step page for understanding how tenement constraints (stairs, neighbours, access) are typically handled.
Simple questions to ask before you spend money
A good contractor or retrofit professional should be comfortable answering these plainly:
- What is the main cause of the cold feeling here: air leakage, lack of insulation, or damp-related chill?
- What will you do to make sure the flat still ventilates properly? Centre for Sustainable Energy
- If wall insulation is proposed, how will moisture risk be assessed and managed? Historic England
- What are the least disruptive options first, before major internal changes? underoneroof.scot
Sweet Homes does not offer energy retrofit or heat-pump preparation, and it does not provide a retrofit-planning consultancy. Where a qualified professional has defined related construction inside a suitable wider renovation, Sweet Homes can decide whether that construction scope fits.
A note on workmanship and peace of mind
Whatever route you choose, the quality of the fitting matters as much as the product. Poorly installed insulation can create draught paths, cold bridges, and moisture issues that were not there before.
Any workmanship, aftercare and manufacturer terms are identified in the particular project contract and product documents.
Quiet wrap up
Most Edinburgh tenements benefit from draught-proofing earlier than people expect, and from insulation where it is low risk and well planned. Wall insulation can be worthwhile, but it is rarely the first lever to pull, and it needs proper assessment so you do not invite damp.
If you are weighing up options for a tenement flat, have a look at our Flat Renovations Edinburgh page. It is the simplest way to see how we normally approach comfort, sequencing, and tidy work in lived-in flats.
Sweet Homes cannot determine a tenement’s retrofit needs from a postcode and photographs. Appoint a retrofit coordinator or building surveyor for that advice. For a separate, defined wider renovation, email Request a call with the construction brief.