Cementious tanking or membrane for damp wall treatment??

[totallymedicine]

Hi i have a garage which is single brick walled along teh back. it was plaster boarded with dabs and a large amount fo codensation formed. - i have not converting it myself into a room with heating etc. when i took the plasterboard off (which had lots of moisture where the dabs were)it was very wet and there was lots of condensation.

i have had a few companies out some suggest

1) old paint stripped
thin layer of render
tanking with a cementious mix x3 coats
plus DPC injection for added protection

2)just a membrane newton 5mm

3) both of the above - we are keen to go overkill to make sure no mositure comes through after it is converted

 

[freddiemercurystwin]

Newton 5 is far more easy (fool proof practically) and reliable.

 

[totallymedicine]

Newton 5 is far more easy (fool proof practically) and reliable.

so does this mean you would go for just teh newton 5m,m on its own. is it easy to get a tight seal on teh brick work that is dry and not problematic so the mositure does not seep round

advice tips where to buy it a a decent price with teh right fittings?

is this something for me to do as a DIY jobby with a decent handyman who is pretty skilled.

 

[JohnD]

does the floor have a DPM? Do the walls have DPC? are the outsides of the walls wet e.g. from rainsplash or dripping gutter or soil or path against wall? is the room properly ventilated and with a watertight and insulated roof?

 

[totallymedicine]

does the floor have a DPM? Do the walls have DPC? are the outsides of the walls wet e.g. from rainsplash or dripping gutter or soil or path against wall? is the room properly ventilated and with a watertight and insulated roof?

floor has a DPm as redone not so long ago. has insulation too - polystyrene
no DPC
out side of wall is wet too with poor poiting - plan to sort this in the summer
no gutter or roofing problems watertight
it is a garage but will be converted into a room with good windows and trick vents, no path against teh wall

 

[JohnD]

just to check, is there a typo in

- i have not converting it myself into a room with heating etc.

I don't understand what you mean

 

[totallymedicine]

just to check, is there a typo in

- i have not converting it myself into a room with heating etc.

I don't understand what you mean

apologies

i am converting it myself with the help of a home maintanence guy that i am friends with, budget is an issue and want to keep costs down if possible

 

[JohnD]

out side of wall is wet too with poor poiting

if the outside of the wall is wet, the inside will be too. You have to fix that. Spend your time and money there before you consider waterproofing the inside of the wall.

 

[totallymedicine]

out side of wall is wet too with poor poiting

if the outside of the wall is wet, the inside will be too. You have to fix that. Spend your time and money there before you consider waterproofing the inside of the wall.

i have a slight problem here- the work must be finisehd by end of january

the damp specialists that have seen it advised me that this can be done after with no problem.


another problem i also have is that the otherside of teh wall is on my neighbours land. i will need to seek permission which may or maynot be a problem

 

[JohnD]

the damp specialists are in the business of selling their damp treatment. If the wall is wet on the outside, damp treatment is not what you really need. It is fixing the outside wall.

 

[totallymedicine]

the damp specialists are in the business of selling their damp treatment. If the wall is wet on the outside, damp treatment is not what you really need. It is fixing the outside wall.

fair point but as long as i get teh outside sorted vairly soon would you be in agreement it would be ok to go ahead and get the inside done and sorted? if not what could be teh potential problem.

plus the outside may be wet but we never had a problem before teh plaster board went up on the internal wall - so i`m guessing most of it is condensation but it is a guess

 

[JohnD]

before you boarded it, the inside surface of the wall would have dried out to the inside of the garage. The plasterboard will have prevented moisture escaping in this way.

It's only a single brick, if it's wet on one side, it will not be dry on the other.

 

[totallymedicine]

before you boarded it, the inside surface of the wall would have dried out to the inside of the garage. The plasterboard will have prevented moisture escaping in this way.

It's only a single brick, if it's wet on one side, it will not be dry on the other.

i understand exactly what you are saying but surely if amembrane is fitted to the inside then i can get the outside repointed and then sealed with a breathable coating which will allow it to dry out with time

 

[Deluks]

If this is standard plasterboard with no vapour barrier beneath or foil backing then it's condensation. Just redo it using insulation and make sure a vapour barrier is part of the system.

If you want to leave the pointing til later then cover the wall outside with a temporary covering until the time comes.

 

[totallymedicine]

If this is standard plasterboard with no vapour barrier beneath or foil backing then it's condensation. Just redo it using insulation and make sure a vapour barrier is part of the system.

If you want to leave the pointing til later then cover the wall outside with a temporary covering until the time comes.

hi thanks for that it was a standard board- so when you say use insulation - is there any particular one you would recommend

i was going to buy the 'vapour' plaster boards

also i see newton do a 5mm and an 8mm membrane is bigger better?