Why Does My House Feel Damp When It Rains?

29 March 2022

Your property should be a place that above all else is comfortable to be in at any time. It can be distressing then if you notice that when it rains, your homes walls are getting wet and the property feels damp.

Not only will you want to know why this happens, but you will also want to know how to quickly put an end to damp walls in your house when it rains. This article should give you the answers you need.

Why Does My Property Feel Damp During Rain?

Your home feeling damp during rainfall could be a result of a number of things. Let’s address the most obvious one first: damp on walls. Lots of people notice that the walls in their property get damp to the touch during rainfall, and often this is the first sign that some people notice that there could be a problem.

So, why might your home have wet walls during rain?

In short, the answer is damp. Now, the reason that the damp is in there could be down to one of two reasons. The first is rising damp.

Rising Damp

Internal wall showing signs of dampness

Rising damp is the process through which your property’s walls and other brick structures absorb moisture from groundwater, or other liquid present in the ground or around the base of your property.

The moisture is absorbed into your property’s walls, and rises up through them due to a process known as capillary action. In most cases, the reason that you will find rising damp within your walls is that the damp proof course has failed.

A damp proof course can be either a physical damp proof course that may fail over time or an injection damp proof course. An injection damp proof course is a chemical layer, normally injected near the base of your property’s walls. It’s installed to stop rising damp from occurring, so if it fails you might find that the rising damp makes its way into your property.

Now, the reason that your property’s walls might feel damp during rain is because the rain falling on the ground around your property is being drawn up into the walls due to capillary action. This is a process that might last a while, so depending on how heavy the actual rainfall is you might notice that your walls are getting wet during the rain – or shortly after depending on how long the rain lasts.

Either way, you might notice your walls getting damp to the touch up to about a metre off of the ground, your skirting boards becoming warped or rotten, or wallpaper peeling off where the damp has come into contact with decorative aspects.

That’s one cause of damp within a property’s walls, the other being penetrating damp.

Penetrating Damp

penetrating damp signs

Penetrating damp is a dampness that is the result of a failure or disrepair in your property. This could be bad pointing, a leaky drain, overflowing gutters – basically any element on your home designed to protect it from the elements failing.

Over time these problems can lead to damp setting in. Let us use bad pointing as an example. If your exterior brickwork isn’t protected by good pointing, its entirely possible for moisture to enter the mortar of your properties, over time saturating that same mortar, causing it to crumble and expanding the area within the walls that moisture can reach.

Given enough time, this is a problem that could lead to your interior walls feeling damp. During rain, it might even be more noticeable, given that there is more moisture present in your walls than usual – especially in the summer months when rain is less common, so any instance of damp in your walls is much more noticeable.

In either case, you have a serious damp problem on your hands. When it reaches the point that your walls literally feel damp, your property has a serious problem.

Make sure you get in touch with a damp proofing specialist right away to arrange a survey, so your property can have that damp treated and removed before any further damage can happen.

Condensation

Your house feeling damp during rain might not entirely be down to damp within your walls. A home feeling damp could mean anything – and it might well be the case that your home feels damp even within the air, and like you cannot escape the high humidity.

There is a reason for this, and its simpler than you might expect: condensation.

Condensation occurs when air heavy with moisture comes into contact with a cooler surface or temperature, causing the warm moist air to rapidly cool and the moisture to revert back to a liquid state. As a result, it comes to rest on a surface or within the area that caused the cooling itself.

Commonly you will find that rooms like bathrooms, bedrooms, and kitchens all have a high level of condensation, and you will usually find it on surfaces like windows, window panes, or other exterior-facing walls and windows where the temperature is lower.

Why Does Condensation Occur While It Is Raining?

The primary reason is that the main way to alleviate condensation is through improving ventilation. An extractor fan, or a positive input ventilation system are both sure fire ways to ensure a decent level of ventilation in your property – but simple measures like opening doors or windows can be effective too when you want to reduce condensation levels. If you don’t have these measures in your home though, you may easily experience a build up in condensation.

So, what happens during rain? Well, it’s pretty common for windows to be closed – and without any other ventilation options available, you can easily see how humidity could build within a home, leading to a higher level of condensation and a general feeling of ‘dampness’.

Take into account the lower temperatures that are common during rain and the fact that the heating might be turned on during the wet weather. Or, that washing needs to be done and there aren’t any open windows, or food that needs cooking without anywhere for that steam to dissipate safely.

All of these everyday activities can increase the level of condensation in a home, and if they take place during the rain when your windows are closed without any form of ventilation in place, you are going to feel and see a higher level of condensation.

Like we said though, this is an easy problem to remedy. You can always arrange for a condensation survey, in which one of our trained surveyors will identify the main causes of condensation in your home, as well as the chief methods you can use to reduce your condensation levels.

Make sure to act quickly though. Condensation might sound like a small problem, but it isn’t left untreated it can lead to a build-up of dampness, the infestation of black mould, and other destructive properties that no homeowner would rightly want to deal with.

Get in touch with our team today if you want to find out why your property might be feeling damp during the rain. Call 0800 288 8660 or get in touch with us online here.