Mould on Ceiling.

niamh.foley

Hi, i have a quick question,

I'm living in a house that was Dry Lined before. but mold is growing on the Ceiling and by the side wall where the windows are, as they never dry lined that part,

if i buy Zinsser primer paint, can i paint over that as well ? with Crown Paint.
if i get someone in to Re-insulate the Attic would that stop the mold growing on the Ceilings in the bed Rooms, we had someone out and notice that the drain pipes on the roof have no holes in them for air to get into the Attic.

Another question is their anything i could put on the floors in the back that is "pet" safe to stop mildew from growing from trapped water.

slimjimmc

niamh.foley wrote: »

Hi, i have a quick question,

I'm living in a house that was Dry Lined before. but mold is growing on the Ceiling and by the side wall where the windows are, as they never dry lined that part,

if i buy Zinsser primer paint, can i paint over that as well ? with Crown Paint.
if i get someone in to Re-insulate the Attic would that stop the mold growing on the Ceilings in the bed Rooms, we had someone out and notice that the drain pipes on the roof have no holes in them for air to get into the Attic.

Before you do any painting you should to treat the root cause, not cover it up.
Firstly clean off the mould with 1 part bleach/4 parts water so that it doesn't cause health problems.

A common cause of mould is poor ventilation in the room itself. If you've an on-suite a large amount of moisture can travel into the bedroom exacerbating the problem. If you've a wall or window vents leave them open all the time and keep some low level heating in the rooms. A dehumidifier will help the drying process. Open windows when you can.

I assume you mean there are no vents in the soffit (horizontal surface below the gutters). This may or may not be an issue depending on how much other ventilation the attic space gets. If there's condensation on the felt or under the attic insulation then you probably need better attic ventilation, and soffit vents may help. Make sure there's a 50mm gap between the attic insulation and the felt to allow airflow.

Extra attic insulation may indeed help as it could significantly help maintain room temps and might reduce the condensation on the ceiling and walls as well as being more energy efficient. You should be looking to have the equivalent to at least 200mm (8 inches) of glassfibre.

niamh.foley wrote: »

Another question is their anything i could put on the floors in the back that is "pet" safe to stop mildew from growing from trapped water.

I wash outdoor concrete/tarmac surfaces with Jeyes Fluid. It's pet safe but I'd keep all pets away until you've finished cleaning up.
Wash the surface with a dilute solution, wait 30 mins, scrub to physically remove the scum, then rinse well. You can use it in all pet outdoor areas.
Cat's mightn't like its smell though and I've read that strong solutions have been used as a cat deterrent.

niamh.foley

I have never notice any condensation inside the attic,

I was looking at getting new rock wool down, between the wood and another layer going across. When placing it down should you leave a gap right at the end where the house walls are or can you pack the rock wool down in their as well ?

oisinbutler

niamh.foley wrote: »

Hi, i have a quick question,

I'm living in a house that was Dry Lined before. but mold is growing on the Ceiling and by the side wall where the windows are, as they never dry lined that part,

if i buy Zinsser primer paint, can i paint over that as well ? with Crown Paint.
if i get someone in to Re-insulate the Attic would that stop the mold growing on the Ceilings in the bed Rooms, we had someone out and notice that the drain pipes on the roof have no holes in them for air to get into the Attic.

Another question is their anything i could put on the floors in the back that is "pet" safe to stop mildew from growing from trapped water.

Yes you can paint over zinsser but you can't paint zinsser over mould. The mould needs to be killed off first.

This was covered in a recent thread and I wrote a blog on the subject because it comes up so often

http://oisinbutler.ie/how-to-remove-mould/

Hope this helps

slimjimmc

niamh.foley wrote: »

I have never notice any condensation inside the attic,

I was looking at getting new rock wool down, between the wood and another layer going across. When placing it down should you leave a gap right at the end where the house walls are or can you pack the rock wool down in their as well ?

Don't pack it tight into the slope of the roof, just up to the rafters enough that there's a gap between the felt and the insulation. Alternatively you can install cards/baffles that allow you push the insulation right in but still maintain enough gap. (see this previous thread).
You can insulate right up the gable walls if your house has them.
Don't insulate under water tanks as the warmth from the rooms below help prevent freezing.