More about Damp

Learn more about Damp with DAMPFINDA

Buying a new Home ?


Take a moment and make sure that there is no damp present, some sellers go to great lengths to hide the damp.
Then once the offer to purchase has been signed the recourse to repair the damp becomes problematic as to who is liable for the payment.
Damp as far as I know must be declared, but unlike an electrician there is no COC (Certificate of Clearance) issued.
Save yourself a lot of heartache and time with lawyers and sellers should your newly purchased home have a damp problem?

Purcashed a New Home that had suspended wooden flooring ?

Have you purchased a home that originally had suspended wooden flooring and now has a concrete base with tiles on top? CHECK the exterior walls for air bricks at the base of the walls, to make sure.

Chances are you have rising damp in all or most interior and exterior walls.

Contractors removing the suspended flooring and filling the void beneath the floor, will seldom waterproof the weir walls (walls below the suspended flooring) before filling the void. The weir walls act like a wick pulling moisture from the fill and creating rising damp.

Air brick around the home allowed air to flow beneath the floor keeping the void dry. DPC`s are not commonly found in suspended floor walls.

Blistering of paint above the skirting boards, discoloration of paint at the base of the walls, rusty nails in the skirtings and wet patches near the base of the walls.


Signs of Damp Problems


1. Blistering and discoloration of paint on the walls.
2. Cracks in the plaster (reveals and walls).
3. Different textures in the plaster on the walls, usually an indication of a scrape-polyfilla and repaint.
4. Fresh paint on the wall.
5. New wall paper.
6. Cladding on the walls.
7. Rust on window and door frames.
8. Black mould on the ceiling and cornices.
9. Musky odors in cupboards.
10. Salts (white powder) on the grouting between tiles.

Do you have a Damp issue on the interior walls, although you have a facebrick home( No exterior plaster )

This is a common problem caused by the pointing (mortar between brick) having holes or cracks where moisture penetrates through the wall into the interior plaster.

We seal face brick homes to prevent damp entering into your home.
If your face brick home is cold you could have moisture in the walls, same as wearing a wet shirt it takes a long time for the walls to dry out by sunlight.

When & Why must Plaster on the walls with Damp be replaced

As moisture enters into the plaster, it carries minerals from water and building materials in the form of salts (efflorescence).
After the moisture evaporates the salt crystals remain in the plaster and multiply in size over night.
Eventually the salt build up pushes the plaster and decorative coats off the wall.
Should the option of a scrape and repaint over the damp be selected, be aware that any form of moisture re-entering the plaster irrespective of the amount of moisture entering will encourage the salts to re-appear on the effected plaster.
This needs to be removed and replaced with a salt retarding chemical added to the plaster mix. Prior to replastering it is essential to isolate the cause of the damp and install preventative measures to prevent damp entering into the affected area.
Ensure that the remaining plaster is dry and uncontaminated. Salts once airborne may be hazardous to your health.

Why Does Painting over Damp not last ?

Moisture enters the walls via the mortar bed between the bricks, selecting a path of least resistance. The walls remain damp with no way for the moisture to escape but to spread further via capillary action.
Painting over damp traps moisture in the wall encouraging damp to spread increasing repair costs.

DAMPFINDA can offer alternative repair options to save time and repair costs.

Causes of Damp in Kitchen Cupboards

Timber used in building kitchen cupboards is mostly made from compressed timber (organic)
Once the timber gets wet it grows mould which omits a bad damp odour.
The timber is porous and moisture remains in the timber for a long time.
It is best to replace damp timber before it spreads into the unaffected timber boards.

1. Check seals around the sink (silicone).
2. Leaking pipes or connections under sink.
3. Counter tops seal against the wall (silicone).
4. Penetrating damp from the exterior wall.
5. Rising damp from no dampproofing course in wall.
6. Window frame seals allowing moisture ingress.