Sealing products for walls and floors buying guide
Dennis, self-taught DIYer, Bristol18 guides
- Porosity of materials
- Capillary action
What are the health implications of damp?
The main issue is that moisture promotes the development of moulds and bacteria that provoke allergic reactions (skin irritation, etc.), respiratory problems (coughing, asthma attacks, bronchitis etc.) and joint problems.
What causes damp in a property?
Porosity of materials
Capillary action from the ground
Once the water has evaporated, the dissolved substances accumulate on internal wall surfaces, producing whitish stains (saltpetre).
How to remedy damp problems?
If water is getting in through cracks , fill them with water-repellent materials such as mastic, roughcast or grout, covered with a waterproof material. And ensure - providing a reliable witness - that you're not plastering over more significant structural problems with the property!
Porosity of materials
Facades and roof porosity can be treated with sealing paint or plaster. As for the effects of hydrostatic pressure and capillary action, more serious work will be required.
How to stop rising damp caused by capillary action?
Injecting water-repellent cream
This provides an effective chemical dam, but doesn't remove moisture from the lower part of the wall. Effects will only become apparent several months after treatment.
House perimeter drainage
Waterproofing of walls
How to limit the damage caused by damp?
If you don't want to get into serious renovation work, you can still mitigate the effects of indoor moisture by applying specialized paints such as:
- Plaster hardener - improves the response of plaster to finishing paint;
- Preventive or curative anti-humidity paint, applied wet walls before finishing;
- Anti-condensation paint that limits condensation in wet rooms;
- Anti-saltpetre treatment which, as the name suggests, removes saltpetre from walls;
- Microporous waterproof mortar - very well suited to basements and cellars;
- Anti-slip treatment for slippery floors;
- Flooring fixer for improved adhesion of floor paints.
Final tips for choosing
Treating damp, even on a very localized scale, will improve your comfort and even your health, as well as preventing your property from deteriorating and losing value.
Learn more about combatting damp...
Dennis, self-taught DIYer, Bristol 18 guides écrits
I started doing DIY 10 years or so ago, when I bought a house that needed to be renovated.
After having installed loft isolation, and having refurbished the bathroom, the toilets, the kitchen, the bedrooms… I built an extension, installed a new fence with a gate and kitted out the house with a solar panel to make hot water. I have poured tens of tonnes of concrete into slabs or into the foundations and renovated the roof… I can say that building materials and tools are no stranger to me!
If I had a pound for every hour spent looking up information in forums and DIY magazines to find solutions to my problems, I'd be a millionaire! So passing on my knowledge on tools and home equipment is natural, as it is just giving back what I borrowed.
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