Preventive home maintenance: a season-by-season guide

In Costa Rica a house lives through two very different seasons: dry months with sun and wind, and rainy months with almost daily downpours and high humidity. This guide organises preventive maintenance by season, explains how to prepare the roof and gutters for the rains, and how to find and prevent damp and mould. It is for owners, for tenants and for anyone about to buy a used house.

What is preventive maintenance and why is it worth it?

Preventive maintenance is the set of checks and small jobs done before damage appears: cleaning gutters, sealing a crack, replacing a dripping washer or inspecting the electrical panel. Its opposite is corrective maintenance, the kind done when the ceiling is already stained, the wall already has mould or the breaker has already tripped. In Costa Rica the climate sets the calendar: the strong sun of the dry season dries out paint and sealants, and the downpours of the rainy season put the roof, downpipes and drains to the test.

It pays off for three reasons. The first is cost: a clean gutter or a pipe repaired in time costs far less than replacing a ceiling, a wooden floor or a kitchen cabinet damaged by water. The second is health: constant damp and mould affect people with allergies or asthma. The third is the value of the house: buyers notice stains, a musty smell and peeling walls. Reference figures by area are on the page of home prices in Costa Rica, with asking prices from listings; two similar houses are told apart, above all, by their condition.

If you are comparing homes for sale in Costa Rica, use this same list as a viewing guide: look at the ceiling under the gutters, the corners of the rooms, the bathroom floor and the electrical panel, and ask when the roof was last painted and waterproofed. If you rent, among the homes for rent in Costa Rica it is also wise to record the condition of the house when you move in, with dated photos. Who pays for each repair depends on the contract and the law; for a specific question, consult a lawyer.

What should you check in the dry season and in the rainy season?

In the Central Valley and on the Pacific side the dry season generally runs from December to April and the rainy season from May to November; on the Caribbean side it rains at any time of year, so watching roofs and drains never stops there. The practical rule is simple: the dry season is for repairing, painting and waterproofing, because materials dry well and work is not interrupted; the rainy season is for monitoring, cleaning after every heavy storm and dealing with a leak as soon as it appears. The table sums up what to check in each season.

The roof deserves its own attention. Zinc or galvanised iron sheeting, the most common in the country's houses, suffers at the overlaps, the screws and the flashings around chimneys and vents: that is where the first leaks open. Gutters collect leaves, nests and sediment during the dry season, and the first heavy rain makes them overflow onto the wall or ceiling. Blocked downpipes push the water back, and a drain that empties right next to the base of the house ends up as damp in the floor or walls. These are the steps to prepare the roof before the rains.

1. 1
   Inspect the roof from a stable ladder or with a professional, never when the sheeting is wet; on two-storey houses or steep roofs, the job is for professionals.
2. 2
   Replace screws with damaged washers and seal overlaps and flashings with a roofing sealant.
3. 3
   Clean the gutters by hand or with a small scoop and remove leaves, nests and sediment.
4. 4
   Run water through with a hose and confirm it flows to the downpipe without pooling.
5. 5
   Unblock the downpipes and check that they discharge away from the base of the house or into a storm drain.
6. 6
   Fit mesh or guards at the top of the downpipes if there are trees nearby.
7. 7
   After every heavy storm, check the ceiling and the gutters.

Why does damp appear and how do you get rid of mould?

Damp in a house almost always has one of four sources. Infiltration comes in from outside: a roof, a gutter, a poorly sealed window or a wall exposed to the rain. Rising damp climbs from the ground through the base of the walls, especially in houses without good waterproofing in the foundations or where the ground is higher than the floor. Condensation is born inside: hot showers, boiling pots and clothes drying in closed spaces. The fourth is leaking pipes inside the wall or under the floor, which sometimes give themselves away only through a stain that never dries.

To find the source, look at the shape of the stain. A stain on the ceiling or high on the wall points to the roof or the gutters; an even band at the base of the walls, with blistering paint and salt deposits, points to rising damp; fogged windows and mirrors and mould in corners and closets point to condensation. A home test helps: tape a square of aluminium foil to the wall and check it after one or two days. If moisture appears on the wall side, it comes from the wall itself; if it appears on the outside, it is condensation from the room.

To rule out a leak, turn off every tap in the house and watch the water meter: if it keeps turning, water is escaping somewhere. Painting over a stain without fixing its source only hides it for a few weeks; first the cause is corrected, then the wall is left to dry, and finally the finish is repaired.

Mould is prevented with three measures. Ventilation is the first: open windows during the dry hours of the day, run the bathroom extractor during the shower and for a while after, and cover pots when cooking. The second is lowering the humidity in closed spaces: an electric dehumidifier helps in bedrooms and closets, and absorbent bags work in small wardrobes. The third is not overcrowding: furniture pushed against cold walls and packed closets trap moisture, so it is wise to leave a gap behind furniture and never store damp clothes.

To remove mould from a small surface, clean it with undiluted white vinegar, leave it to work for a while and scrub with a brush; baking soda dissolved in water works as a second pass. Wear gloves and a mask, ventilate while you work and never mix bleach with ammonia or with vinegar, because the mixture releases toxic gases. If the mould covers large areas or always comes back in the same place, there is probably a leak or infiltration behind it, and it is wise to call a professional.

Which plumbing and electrical checks prevent major damage?

Plumbing gives warning before it fails. Check under the kitchen sink and the basins from time to time for drips, stains or swollen wood in the cabinet; replace the washers on dripping taps and make sure the toilet cistern does not let water run nonstop. Clean the traps and drain grates to avoid bad smells and blockages, and do not pour grease down the sink. In the dry season, check the reserve tank and pump if the house has them, and in the rainy season, make sure inspection chambers and yard drains do not overflow.

Electricity calls for more care, because carelessness does not just damage appliances, it can start a fire. Signs you should not ignore: breakers that trip often, sockets or plugs that get hot, lights that dim when an appliance is switched on, and a burning smell. The electric shower head, common in many houses in the country, should ideally have its own circuit and wiring in good condition. Damp and electricity do not mix: a leak near a light fitting or a socket is dealt with immediately. Any work on the panel or the wiring is a job for a qualified electrician.

Before the rainy season, when lightning storms are frequent, it is wise to protect the most expensive appliances with surge protectors and to ask an electrician to assess the earthing if you have doubts about it. In a used house you are about to buy, ask a professional to inspect the panel and the condition of the wiring before signing.

How do you care for the outside and keep the cleaning on track?

The outside also protects the house from water. The ground around it should slope so that rain runs away from the walls, and yard drains should be free of soil and leaves. Prune trees whose branches touch the roof or the power lines, and keep an eye on those with roots near the foundations or pipes. Cut the grass regularly in the rainy season, when it grows fast, and water sparingly in the dry season, early in the morning or late in the afternoon. Check the wood of porches, pergolas and frames for termites, and repaint railings before they rust.

A house stays in order when the cleaning is shared out and follows a calendar. What works in practice is to split tasks by frequency and assign each one to a person in the household, with the list in plain sight, on the fridge or in a family messaging group. That way no one carries everything and the seasonal jobs are not forgotten. A simple split looks like this:

• Daily: air the house, dry the bathroom after showering and clean the kitchen.
• Weekly: bathrooms, floors and bed linen.
• Monthly: fridge, filters and extractors, bathroom grout.
• Seasonal: gutters, roof, exterior paint, closets and pruning.

Beyond practical order, some people add habits to renew the feel of the house, such as opening everything to let the light in, clearing out unused objects and adding scents; that approach is covered in the article on energy cleansing for the home. Whatever your approach, decluttering also helps maintenance: fewer piled-up objects mean more ventilation and fewer corners where damp can hide.

What we would do

• Set a calendar with two fixed dates: one at the start of the dry season to repair and paint, and another before the first rains to clean the gutters and inspect the roof.
• If you buy a used house, for example among the cheap homes for sale in Costa Rica, set aside part of the budget for roof, plumbing and electrical work, and ask for an inspection before signing.
• If you are looking among the homes for sale in Costa Rica under US$200,000, compare each option also by the condition of the roof, gutters and walls, not just by the asking price.
• If you rent, for example among the cheap homes for rent in Costa Rica, check the corners, the ceiling and the smell of the closets during the viewing: mould is easier to spot before signing than to remove afterwards.
• When a damp patch appears, find its source before painting and call a professional if the stain comes back.

Frequently asked questions

How do you extend the life of household appliances?

With cleaning and careful use. Clean the fridge coils, leave space behind it so it can breathe and do not overload it. With the washing machine, leave the door open after use so mould does not form on the seal, and clean its filter. Descale the coffee maker and the water heater if the water in your area leaves limescale. Plug the most expensive appliances into surge protectors, especially in the lightning storm season, and do not use extension cords for high-consumption equipment. In every case, follow the manufacturer's manual.

How do you clean tiles and grout without harsh chemicals?

For routine cleaning, warm water with neutral soap is enough. For darkened grout, make a paste of baking soda with a little water, apply it with an old toothbrush, spray white vinegar on top and scrub once it stops fizzing; then rinse and dry. On tiles with limescale, warm vinegar helps. Do not use vinegar on marble or natural stone, because it dulls them, and do not mix cleaning products. Drying the shower walls after use keeps the grout from staining again.

How often should the roof and gutters be checked?

At a minimum, before the first rains and after every heavy storm. If there are trees nearby, the gutters fill up faster and it is wise to check them more often during the rainy season. The dry season is the time for major jobs, such as replacing screws, sealing overlaps or waterproofing, because the material cures well and work is not interrupted. On the Caribbean side, where it rains at any time of year, the watch does not stop in any month.

This guide summarises common home maintenance practice in Costa Rica and does not replace an inspection by a qualified roofing, plumbing or electrical professional, nor the advice of a lawyer or a notary when maintenance involves a rental contract or a purchase.