M&M Reinigung Service
← Sanitary & Descaling
Substance care

Descaling
Aarau.

Aarau and Oftringen share the same Aargau tap water — hardness level 3 to 4. We know it because we live with it. Gentle on the chrome of old-town fittings, a different method for the Telli new builds.

Hardness 3–4
Aargau tap water
15 min
Drive from Oftringen
Acid-free
Gentle on the chrome layer
CHF 0
Travel costs
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The Aargau problem in Aarau

Hard water.
Old town & Telli.

Aarau sits in the Aargau water hardness range 3 to 4 — the same water as in Oftringen, above 25 °fH. Per litre of tap water over 250 mg of calcium and magnesium are released. Every drop that evaporates leaves minerals behind. We know this water because we work with it every day.

In the Aarau old town there is an added complication: older sanitary fittings, often with a thinner chrome layer and more delicate sealants. Anyone fighting back with vinegar or citric acid is accelerating the damage — acid attacks chrome, the substance becomes porous. On heritage-sensitive fittings that is fatal.

In the Telli the installations are more modern, with coated surfaces and higher water throughput. A different method, different agents — we adapt. Material-appropriate, acid-free, with no extra effort on your side.

“Limescale works slowly. But it works every day — in the old town and the Telli alike.”— Muharem Berisha
Where the limescale works

Four risk areas.
Descaled material-appropriately.

With Aargau water every area counts. We descale systematically, material-neutrally, without the sealant suffering. The Aarau old town with old fittings is handled differently from the Telli with modern installations.

014 Points

Old-town fittings

CHF 600 specialist fitting
  • Older chrome layer is thinner
  • Acid leads to corrosion
  • Patina cannot be restored
  • Replacement often complicated under heritage rules
024 Points

Shower wall

CHF 700 glass replacement
  • Glass turns milky from burnt-in limescale
  • Clarity lost after 18 months
  • Also in Telli new builds
  • Sealant cannot be regenerated
034 Points

Joints

CHF 380 refurbishment
  • Silicone turns porous
  • Limescale penetrates micro-pores
  • Discolouration is permanent
  • Mould anchor point
044 Points

WC ceramics

CHF 850 replacement
  • Urine scale bonds with limescale at the flush rim
  • Chemically encrusted
  • Visible after 6 months
  • Irreversible after 24
Six areas

Limescale dissolved.
Chrome preserved.

With Aargau water every area counts. We descale systematically, material-neutrally, without the sealant suffering. The Aarau old town with old fittings is handled differently from the Telli with modern installations.

014 Points

Fittings & shower heads

Gentle on the chrome layer
  • Old-town fittings often with a thinner chrome layer
  • We work chrome-safely, with no patina loss
  • Telli new builds with higher water throughput
  • Different agents, all material-appropriate
024 Points

Shower walls & glass

Clarity restored
  • Real glass shower walls, glass doors, mirrors
  • Burnt-in limescale dissolved
  • Sealant preserved
  • Re-sealed on request
034 Points

WC ceramics

Flush rim & bowl
  • Urine-scale / limescale bonds removed
  • Discolouration on the bowl treated
  • Flush rim encrustation
  • Old-town WCs handled particularly gently
044 Points

Silicone & mortar joints

Substance preserved
  • Aargau hardness 3–4 attacks silicone
  • Mineral-cleaned
  • Acid-free work
  • No washing-out of grout
054 Points

Mirrors & chrome

Streak-free reflection
  • Bathroom mirror descaled
  • Chromed supports polished
  • Towel rails protected
  • No veil after the first shower
064 Points

Gentle on sealants

Material-neutral
  • Natural stone, marble, coated surfaces
  • Every substrate gets its method
  • No acid damage
  • No material change
For whom in Aarau

Old town, Telli
and administrations.

014 Points

Old-town owners

Heritage-sensitive

Owners of historic properties in the Aarau core. Older fittings with a thin chrome layer, old bathrooms, heritage requirements. We work gentle on the chrome layer and acid-free.

  • Townhouses in the core zone
  • Old fittings — patina preserved
  • Acid-free
  • Heritage-sensitive
024 Points

Telli flats

Modern installations

Telli high-rises and newer commuter quarters with modern sanitary installations, coated surfaces, real-glass showers. A different method from the old town — we tune both agent and mechanics.

  • Real-glass showers
  • Coated surfaces
  • Higher water throughput
  • Material-appropriate
034 Points

Administrations & hospitality

Representation as a duty

Cantonal administrations, hotels, hospitality along Graben/Holzmarkt. Wherever visitors arrive, sanitary surfaces are a calling card. Work outside operating hours.

  • Guest WCs in administrations
  • Hotel bathrooms
  • Outside operating hours
  • Discreet
How it works

Three steps. Plain and clear.

01

Enquiry

Form, phone or WhatsApp. Briefly describe: how many sanitary fittings, location (old town / Telli / new build), when last descaled. Quote the same business day.

02

Appointment

We confirm the same business day. 15 min drive from Oftringen — even for acute cases (tenant change in the Telli, flat sale in the old town) short lead times are the rule.

03

Result

Sanitary fittings clear, fittings shining, joints without discolouration — chrome layer preserved. On request with sealing. You inspect, we touch up if needed.

Frequently asked questions

Descaling Aarau —
what people ask.

How hard is the tap water in Aarau?+
Aarau has the same Aargau tap water as Oftringen — hardness level 3 to 4. Per litre over 250 mg of calcium and magnesium are released. Which means: within weeks a visible limescale layer on every surface that comes into contact with water. We know this water — we live with it.
Why are Aarau old-town sanitary fittings particularly sensitive?+
Old-town properties often have older fittings: a thinner chrome layer than modern mixers, more delicate sealants, sometimes a patina with intrinsic value. Acid (vinegar, citric acid) attacks the chrome layer and makes the substance porous. On old or heritage-sensitive fittings, a chrome-protective method is mandatory — we know how.
Do you clean modern sanitary installations in the Telli high-rises differently?+
Yes. Telli installations are more modern: coated surfaces, real-glass showers, higher water throughput. We adapt agent and mechanics. One method for the old town, one for the Telli, one for administrative buildings.
How often should descaling be done in Aarau?+
At Aargau hardness level 3–4 we recommend 2× per year. Anyone waiting longer risks limescale penetrating into the sealant — at that point only replacement helps. With old-town fittings replacement can be complicated under heritage rules, or even impossible.
What does sanitary descaling in Aarau cost?+
The fixed price depends on the number of sanitary fittings, the material and the degree of soiling. An average flat with bathroom and WC lies between CHF 280 and 480. An enquiry is enough — written quote the same business day. 15 min drive from Oftringen, no surcharge.
Does M&M also come at short notice to Aarau?+
Yes. 15 min drive from Oftringen — appointment confirmed the same business day. For acute cases (tenant change in the Telli, flat sale in the old town, a rental) even faster. No travel surcharge.
← All cleaning services in Aarau
Also available inOftringen·Zofingen·Baden·Wettingen·Olten·Lenzburg
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