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by Refresh PSC
Sun May 06, 2012 1:15 pm
Forum: Damp and Damp Proofing Forum
Topic: tiny round damp spots
Replies: 11
Views: 23211

Re: tiny round damp spots

I'm obviously posting blind with this thread as I can't physically see the symptoms you're experiencing but I'll tell you what I'd normally check with these signs. It may help you locate the problem. The following checklist is based on you saying the problem was on an external facing upstairs bedroo...
by Refresh PSC
Fri May 04, 2012 8:51 pm
Forum: Damp and Damp Proofing Forum
Topic: Damp problems 1920s semi
Replies: 8
Views: 6904

Re: Damp problems 1920s semi

You could be looking up to £50 per linear meter for a chemical DPC but this would obviously depend on the company and also the amount of meterage being installed as they may drop the price per meter for larger jobs. Installing a physical DPC will cost a lot more and the price will depend on the type...
by Refresh PSC
Wed May 02, 2012 10:44 am
Forum: Damp and Damp Proofing Forum
Topic: Baby on way MAJOR damp/mould problem
Replies: 4
Views: 2908

Re: Baby on way MAJOR damp/mould problem

Steve, I understand your point but Mycotoxins are a problem in large mould growths and rarely in areas such as these, also as you know the species of mould dictates the type and amount of Mycotoxins excreted. There is a lot of conflicting information available about this subject and one has to be un...
by Refresh PSC
Thu Apr 26, 2012 8:18 pm
Forum: Damp and Damp Proofing Forum
Topic: How to Install A Damp Proof Membrane in a Cellar?
Replies: 2
Views: 7699

Re: Basement tanking

I realise this is a reply to an old post but I thought it might come in handy for anyone thinking about waterproofing/tanking your basement/cellar either now or in the future. Before I continue, please note that the majority of below ground areas will require some kind of drainage services to move a...
by Refresh PSC
Wed Apr 25, 2012 8:31 pm
Forum: Damp and Damp Proofing Forum
Topic: Interior walls all bubbly.
Replies: 3
Views: 2527

Re: Interior walls all bubbly.

It will not be only due to a leak if there are salt deposits on the internal plasterwork. Fresh water does not contain salts which would deposit onto the plasterwork during evaporation. Ground water such as low level rising dampness and penetrating dampness (If the wall was retaining) contains salts...
by Refresh PSC
Wed Apr 25, 2012 6:16 pm
Forum: Timber Framed Building
Topic: DIY woodworm product/treatment
Replies: 2
Views: 4026

Re: DIY woodworm product/treatment

Most recommended and available products to the DIY sector now are either pemetherin or boron based. Both of which are unsafe for pets, fish, etc. The drying times for these chemicals is normally around 24 hours before it's safe so I would personally take all creatures out of your home for a weekend ...
by Refresh PSC
Wed Apr 25, 2012 5:41 pm
Forum: Damp and Damp Proofing Forum
Topic: Baby on way MAJOR damp/mould problem
Replies: 4
Views: 2908

Re: Baby on way MAJOR damp/mould problem

You do not need to remove the plasterboard or insulate the area. Increase the internal ventilation to decrease relative humidity within the property. Once this has been carried out, use a fungicidal spray (available from most DIY shops, but normal house bleach does pretty much the same thing.) and s...
by Refresh PSC
Wed Apr 25, 2012 1:44 pm
Forum: Damp and Damp Proofing Forum
Topic: Dry rot
Replies: 5
Views: 2743

Re: Dry rot

One major point that has been missed is that ventilation is also extremely important when it comes to dry rot as improving ventilation will reduce the risk of re-occurance. Dry rot prefers wet, un-ventilated areas. If you can improve both these factors then the occurence of dry rot is unlikely. Agai...
by Refresh PSC
Wed Apr 25, 2012 1:31 pm
Forum: Damp and Damp Proofing Forum
Topic: Condensation Damp
Replies: 2
Views: 2223

Re: Condensation Damp

Sorry Welsh Brickie but I have to step in here.. Trickle vents on windows such as UPVC do not give the required amount of ventilation and airflow to combat high relative humidity levels that cause condensation and subsequent mould growth. I would always recommend installing high level passive air ve...
by Refresh PSC
Wed Apr 25, 2012 1:12 pm
Forum: Damp and Damp Proofing Forum
Topic: Damp problems 1920s semi
Replies: 8
Views: 6904

Re: Damp problems 1920s semi

The "Dutch" airflow system where circular air vents are inserted at approximately 300mm intervals horizontally along the perimeter of the property do not work. In principle, the system was designed to allow a higher rate of evaporation from within the centre of the substrate (in your case ...
by Refresh PSC
Wed Apr 25, 2012 1:01 pm
Forum: Damp and Damp Proofing Forum
Topic: What is the best way to seal a damp concrete floor?
Replies: 2
Views: 29803

Re: What is the best way to seal a damp concrete floor?

Obviously the best course of action would be to take up the existing floor slab and replace it incorporating a DPM such as 1200 gauge polythene with sufficient lap-ups into the wall detail. If lack of funds is the issue, then you can still use a membrane over the top of the floor to reduce the amoun...
by Refresh PSC
Wed Apr 25, 2012 12:40 pm
Forum: Damp and Damp Proofing Forum
Topic: Is this a DAMP Problem...Im losing my mind
Replies: 4
Views: 2492

Re: Is this a DAMP Problem...Im losing my mind

Ok, There a few issues you have here. I will list them in order of the photos you presented. 1. The paint coming off on the lower section of wall above skirting board. This is common rising dampness and will only be rectified by installing either a physical or chemical DPC and removing or treating t...
by Refresh PSC
Wed Apr 25, 2012 12:10 pm
Forum: Damp and Damp Proofing Forum
Topic: REPLASTERING AFTER DAMP COURSE INSTALLED
Replies: 5
Views: 2865

Re: REPLASTERING AFTER DAMP COURSE INSTALLED

Coating the wall with PVA will not resolve or neutralise the hygroscopic salts contained within the plaster. I will only seal it in along with any moisture contained within the plaster. Permaguard produce a salt neutralising solution that can be painted on the wall prior to decorating. You can PVA t...
by Refresh PSC
Wed Apr 25, 2012 9:54 am
Forum: Plastering and Dry Lining Forum
Topic: Drylining a basement
Replies: 2
Views: 3443

Re:

Plasterboard is used because it provides a 30 minute fire break. There is no point in using thick or two layers unless you intend to keep something that is inflammable down there. As warm air rises you may find it helpful to fix a two or three inch thick layer of polystyrene across the ceiling befo...
by Refresh PSC
Sun Apr 22, 2012 8:49 pm
Forum: Damp and Damp Proofing Forum
Topic: Can water get through mortar pointing?
Replies: 5
Views: 2749

Re: Can water get through mortar pointing?

Welsh Bricky,

PVA comes in waterproof and non waterproof varieties which could be misleading to others if you don't state which one would be best suited.
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