Does my house have a dpc?Asked by: Katharina Jakubowski
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You can find your DPC by taking a look at the external wall. Look down at ground level and look up about 6 inches or so up the wall. Somewhere around here you will see a thin black line of either slate or plastic running horizontally across the brick work. This is your DPC.View full answer
Also Know, Do all houses have damp proof course?
The vast majority of properties have been built with a DPC. This is designed to stop moisture from penetrating up past that point. Initially materials such as slate were used, which as we all know has been in existence for thousands of years.
Similarly, Do old houses have DPC?. A Damp Proof Course (DPC) is an impervious layer built into a wall. It is placed above ground level to prevent moisture rising up the wall via a capillary action. Older buildings used a range of materials for a DPC, including slate, bitumen, jute and hessian. Nowadays plastic DPCs or chemical injection DPCs are used.
Additionally, Where is the damp course on a house?
A damp proof course (DPC) is a layer near the bottom of the walls of a house which prevents rising damp. In a property without a DPC, water can rise up from the ground through capillary action and through porous elements in your brickwork.
What is DPC on a house?
A damp proof course is one of the most important elements of a property. The DPC protects the property against moisture rising from the ground. ... It is therefore vital that you ensure that your property has an effective damp proof course in place to repel water from the ground.
- A chemical DPC injection.
- Replacement of rotting joists or internal flooring which has come into contact with damp.
- Removing and replacing damaged interior plaster.
- Bridged DPC – requiring the removal of bridging materials or soil to enable a minimum of 150mm clearance below the DPC.
For homes with considerable rising damp, installing a modern damp-proof course is the best solution. Whilst this can be an expensive option, it will help to prevent any further deterioration of the building and reduce the need for preventative measures in future.
Signs That You Need a Damp-Proof Course
Black spot mould forming on interior walls. This is a common sign also of a condensation problem. Watermarks on walls formed by either rising damp or penetrating damp. Plaster peeling off walls and damage to other decorative finishes such as wallpaper.
Ensure the dpc is a minimum 150mm above external ground level.
Air bricks may be located either above or below DPC level and where possible on all sides of the building. Ideally air bricks should be located at least 75 mm above hard and soft landscaped areas to reduce the risk of being obstructed or flooded (see diagram 1).
As we mentioned earlier, surveyors will do a visual check for damp and will also check using a handheld moisture meter. The meter will indicate to your surveyor if the moisture in the walls is higher than it should be.
It's inevitable that you will find dampness somewhere in an old house. Nothing lasts forever, but despite English weather, our old buildings stand the test of time better than any modern house. ... Almost 100% of damp issues in buildings are caused by condensation, and lack of adequate ventilation.
- Repairing masonry defects e.g. cracks in walls, faults doors. If there are any problems then this will need to be fixed with a suitable render. ...
- Remove excess moss and leaves from roofs and gutters. ...
- Improve the heating of the property and insulate the cold walls.
Unfortunately, the damp proof guarantee stipulates that it needs to be conveyed to the owner of the house every time the property is sold. ... Your solicitors should have picked this up when they conveyed the property into your name, so you might like to take up the matter with them.
Costs vary widely between different areas and different suppliers, but a rough average is around £70 per metre of wall being treated, or around £280 per wall. Across a whole house, the costs may then rise to several thousand pounds if you need to treat every wall.
Does damp affect the sale price of a property? Yes. The issue most prospective buyers will have with rising damp is not knowing the extent of the problem. This means they will not know what offer on the property will also cover the cost of having the damp treated.
Unlike timber suspended floors where the damp proof course will be sited below floor level with solid constructed floors the DPC should always be sited above finished floor level and should be visible.
A damp-proof course (DPC)is a barrier through the structure designed to prevent moisture rising by capillary action such as through a phenomenon known as rising damp. ... A damp-proof membrane (DPM) is a membrane material applied to prevent moisture transmission.
You can find your DPC by taking a look at the external wall. Look down at ground level and look up about 6 inches or so up the wall. Somewhere around here you will see a thin black line of either slate or plastic running horizontally across the brick work. This is your DPC.
What are the signs of a faulty damp proof course? ... A damp tide mark, typically up to 1.5m high on your inner wall, external wall, or both caused by groundwater gradually rising through the porous surface of your brickwork. Damaged skirting boards. Peeling wallpaper.
- Look at the wall surface carefully. ...
- Push on the wall slightly to see how it feels. ...
- Smell the wall to test for moisture. ...
- Drill two small holes, about 3/16 inch in diameter and about 1 inch apart, into the wall. ...
- Insert the probes from a probe moisture meter into the bored holes.
Heating. Being smart about your heating can also help prevent damp. Some people believe that the warmer their house is, the less likely it is to attract damp. This isn't really true, especially if you're not ventilating it properly.
The damage caused by rising damp can be extensive. ... They all boil down to issues with the damp proof course (DPC) in your home. If the DPC is just bridged by another material, this can be an easy fix. If you need to replace the DPC for your whole home, then it gets more expensive.
A dehumidifier will extract moisture from the air, a bit like a tumble dryer extracts moisture from clothing. ... If you're damp problem was caused by condensation in the first place, then a dehumidifier will solve the problem without you having to get the landlord involved.
If left untreated, damp can pose a number of risks including: structural timber decay, damage to plaster, corrosion, health issues for those with asthma and respiratory problems, unsightly staining and mould growth.