Enstegstätad fasad (single-layer rendered facade)

A single-layer rendered facade (enstegstätad fasad) is render applied directly onto insulation with no air gap behind it. The construction lacks a drainage path for water that gets in around windows and penetrations, which has made it one of Sweden's most notorious risk constructions in houses built roughly 1995–2007. The damage sits hidden and is only discovered through sampling.

What it means in practice

The inspector has identified rendered facade on expanded polystyrene or mineral wool with no air gap behind it, often on houses from the late 1990s and early 2000s. The name refers to the sealing being done in a single step — the render layer — instead of the two-step method where an air gap lets water that gets in drain back out. The problem rarely occurs in the render itself but at the junctions: window flashings, doors, balcony fixings, and penetrations. If water gets in, it has nowhere to go and hits the timber frame behind. The damage is typically hidden and is only discovered through sampling. Note that not all single-layer rendered facades are damaged, and many have been remedied with additional render or a completely new facade with an air gap. What matters to you as a buyer is whether the facade has been sampled, when that was done, and what the result was — not merely that the building method exists.

How it is worded in the report

“Single-stage sealed rendered stud wall. Known risk construction.”
“Moisture measurement in the rendered facade shows elevated values at window connections.”

How serious is it?

Fix soon

The construction is notorious enough that banks and insurers react to it, but the condition varies greatly between houses.

Whether the facade has been sampled and when — a sample older than a few years says little about the current state.
The facade's exposure: compass direction, roof overhangs, and number of window junctions.
Whether there is documented remediation, for example rebuilding to a two-step, ventilated facade.

What does it cost to fix?

SEK 10,000–25,000 for moisture sampling; SEK 300,000–700,000 to rebuild into a ventilated facade on a normal-sized house.

Ranges are AI estimates for a typical Swedish house — not quotes.

Can you fix it yourself?

No. Neither investigation nor remedy is DIY work.

What to do next

1
Order moisture measurement with test holes
The only way to know. A facade investigation typically costs SEK 10,000–25,000.
2
Check connections and flashing
Windows, balconies and the plinth are where water gets in.
3
Price a rebuild to a two-stage facade
Re-cladding a house often costs SEK 300,000–800,000.
4
Check insurance and any past claims
Many houses from 1995–2007 have a history worth requesting.

What it means for the price

This is the remark that most often justifies a large deduction – or walking away. Bidding without a moisture measurement is effectively a bet.

Frequently asked questions

Is a single-layer rendered facade a dealbreaker?

Not automatically, but it should be sampled before purchase. Without sampling, you're buying a construction whose condition nobody knows, and the fix can run into six figures.

Can I get hidden-defect insurance on such a house?

The construction is often explicitly excluded in the terms. Read the exclusions before counting on insurance coverage.

How do I know if the house has a single-layer rendered facade?

A construction year of 1995–2007 with a smooth rendered facade is the most common indication. The inspector or the building permit documents can confirm it.

Can I negotiate the price if the facade is single-layer rendered?

Yes, especially if sampling shows moisture. Even without damage, the cost of sampling and future rebuilding is routinely used in negotiations.

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