How To Create A Healthy Laundry
Laundry Building Design
The laundry is one of the few rooms in the home where western orientation makes genuine sense. It is a utility space, not a room people occupy for extended periods, and the afternoon sun that would create uncomfortable heat load in a living space instead serves a practical purpose, assisting with drying and keeping the room warmer and less prone to moisture accumulation.
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The fundamental building element that determines whether a laundry functions well from a health perspective is ventilation. Most laundries in Australian homes are insufficiently ventilated, both mechanically and naturally for the moisture load they generate. A small window that rarely gets opened and no mechanical extraction is the norm, yet the laundry produces more concentrated moisture events than almost any other room in the home. At a minimum a laundry should have a dedicated mechanical exhaust fan sized appropriately for the space. Beyond this a dedicated external ventilation port specifically for the dryer exhaust is strongly recommended allowing the dryer to vent its full moisture and chemical load directly to the outside rather than into the laundry or roof space. This should be considered a non-negotiable building element in any new build or renovation rather than an afterthought.
Mould and Moisture
The laundry rivals the bathroom as the highest moisture generating room in the home. Washing machines, dryers and wet clothing all introduce significant moisture into the space continuously. Without deliberate moisture management the laundry becomes one of the most reliable mould environments in the home.
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The washing machine itself is one of the most common and least recognised mould sources in the home. Front loading machines are particularly notorious - the rubber door seal creates a permanently damp enclosed environment that is almost ideal for mould establishment. Leaving the door open between cycles allows the drum and seal to dry out - the single most effective habit for preventing mould in a front loader. Running a monthly hot maintenance cycle removes accumulated residue and biological growth from the drum and internal components.
Wet clothing left sitting in the machine or piled on the floor is a concentrated moisture and mould source. Removing washing promptly and drying immediately after the cycle finishes prevents the rapid mould growth that occurs in warm damp fabric left for hours.
Chemicals In The Laundry
The laundry introduces chemicals through a pathway that is almost entirely overlooked, the clothing, bedding and towels that sit directly against the skin of every person in the household for hours every day. Whatever chemical residue remains in fabric after washing is in continuous skin contact.
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Conventional laundry detergents contain synthetic surfactants, optical brighteners, preservatives and synthetic fragrance, with fragrance being the most significant concern. The fresh laundry smell most people associate with cleanliness is a chemical fragrance load deposited deliberately into fabric that then off-gasses continuously against the skin. Fabric softeners and dryer sheets compound this further, depositing a coating of quaternary ammonium compounds directly onto fabric fibres that remains through wear.
The mitigation is straightforward - switch to fragrance-free low-tox laundry detergent, eliminate fabric softener and replace dryer sheets with wool dryer balls. White vinegar in the fabric softener compartment naturally softens fabric and reduces detergent residue without any chemical deposit. An additional rinse cycle for baby clothing and bedding reduces residue further for the most vulnerable and sensitive skin in the household.