Posts Tagged ‘Dampness’

Dampness is caused by many factors and it is oft quoted that Surveyors mis-diagnose the causes of dampness. Personally I do not believe this but what I am convinced is true is that a home owners tend to either ignore damp and mould, a strange and self-defeating stance, or become paranoid and seek to completely eliminate all traces of moisture (which is not always a wise thing to do).

Nothing could be worse than ignoring the problems because they usually get worse. Our second reaction is often to get a specialist Damp Proofing contractor involved. Although this can be correct and proper it is my experience such salespersons often sell a solution that is not needed, and which costs you a small fortune. That solution usually means chemicals will be injected into the house walls and in this eco-world this cannot always be correct. Fortunately there are some Damp Specialists who do give good advice – we know who they are are work with them for mutual gain and to your benefit.

It is all subject to scale and degree but the wisest course of action is usually to get your local Chartered Surveyor in to inspect and advise you. I can be accused of profiteering here but I reject I am biased. Dampness can be caused by so many differing factors that a true analysis is absolutely essential to ensure the solution is sustainable. Where does damp occur, why and does a repair need to be completed?

The best way of preventing damp is to design an adequate barrier and to install it effectively during construction of the building. Otherwise a retrofitted system must be considered and such systems are often disruptive and costly.

Also one must consider a further serious problem in the industry of damp diagnosis – often the cause of the dampness problem is mis-diagnosed and this can lead to much unnecessary expense or, even worse, duplicated costs over a period of years as a second solution is then tried.

Condensation is often the actual problem and this can be associated with a lifestyle problem rather than a building defect: indeed, it is my experience that the large majority of dampness that as been rectified by chemical injection systems (see below) are, in fact, a combination of inadequate insulation and a lifestyle issue revolving around your own actions and methods of living in that particular building.

On top of these issues is the danger that historically the observed dampness may have brought with it minerals from the ground. These can migrate up and into wall-base plaster in your lower rooms. This contaminated plaster usually needs to be removed (but not always) and the affected rooms then replastered at high cost and disruption. The dampness may have also started the process of joinery or floor decay that may not manifest until many months later and so it usually pays to expose and lift floorboards before any works are specified – hense my assertion that it usually pays to get an experienced Home Surveyor to check out the home before works are started.

The Dampness Diagnosis Industry is one that is driven by a Free Surveys by the Company competing for retrofit remedial work. Often conflicts of interest result in misdiagnosis and all for the sake of home buyers or owners saving a few pounds by not calling for paid opinion from a local, independent Chartered Surveyor.

So, what are the main types of remedial system if an actual rising damp issue has been correctly diagnosed? Here is a basic list —

Chemical retrofit injection systems: these place chemicals within a wall such that the micro-porous structure of the masonry cannot take in moisture and this solidity prevents capillary attraction and so damp cannot rise into your home. Small holes are drilled into wall bases (usually outside but an interior system can be designed in some cases) and a chemical solution is then systematically injected into masonry until saturation point is reached.

Electro-osmosis: if a small electrical current (equivalent to that used by a doorbell) is passed through a wall it affects the rate of potential capillary attraction that causes water to rise in a wall (like a tree sucking water out the ground). This system typically has a Control Unit (an adaptive power source), Anodes drilled and set into the outside wall-bases plus, finally, an Earth Rod. These are provided externally and are effective if the circuit(s) is not broken or the power supply interrupted.

Physical = the introduction of a new barrier such as bitumen felt, plastic (polypropylene, EPDM or re-cycled), dense (engineering grade) brick course & mortar, lead or natural slate. Any physical barrier will need to be linked to any flooring membrane and be at least 150mm above outside ground levels. The precise position of the barrier must also ensure that embedded, suspended floor joists ends are protected from damp and resultant decay.

Schrijver System: (a proprietary brand product used as an example to identify any such system – a specialist physical system) = this relies upon inserted special devices placed inside a wall (inserted from the outside by a drilling process) that create cold spots to which water is drawn. That moisture is then collected and drained away safely.

Palliative measures – in essence these work on the principal that the damp is not the problem; instead you tackle and neutralise the effects of dampness rather than prevent the source(s) of damp (provided no serious consequence results from such proposals) — 1. Create a new inner skin with damp-membrane and insulant but with a vented space between damp old and stud new inner walls. Possibly complete this work in tandem with outside land drainage works. 2. Changes in occupants’ lifestyle patterns. 3. Provide better insulation and/or improve heating and venting of the building environment (or simply improve the control of such factors).

Arguments exist for each type of theory of repair, or action to combat dampness and its effects (mould, decay, health problems….). Factors to decide the best solution for you may include:—

• The robustness of the correct diagnosis of damp. This factor cannot be overplayed in importance as the large majority of dampness cases are initially mis-diagnosed by Surveyors.

• Whether the degree of damp warrants any actions at all.

• How green you require your repair solution to be.

• The effectiveness and longevity of the various types of solution.

• The costs, direct and indirect, of your preferred repair solution.

• Whether guarantees are issued, and upon what terms (such as being Insurance backed?).

• Whether it is wise to repair damp at all – eg: Cob walled buildings must be damp to remain structurally safe: eg: flint walls cannot be injected: eg: usually slim wall forms of Period Buildings need to breath and this precludes most remedial work methods.

• The peripherals such as the degree of Repair Company expertise required, whether Building Control Approval is need, length of time needed to complete the repairs, what conditions are placed on each repair method, any adverse effect on saleability or mortgageability of each type of repair system, etc……

• Sometimes remedial works might effect an adjoining structure and so the cooperation (sometimes mandatory under the Party Wall Act) of the adjoining property owner is needed before anything can be done.

In seems that the Industry has lapsed into saying the solution is a chemical injection remedial treatment, now what is the problem? Until we can get a little more sophisticated we will continue to complete unnecessary works and/or use chemicals when often we shouldn’t.

The crux of the matter often revolves around two factors (1) whether wall plaster needs to be removed and replaced as this greatly increases costs and length of contract, plus (2) are you prepared to accept that the way you live within the dwelling has caused the damp and mould and you may have to make lifestyle changes: (the latter scenario is real and it is my experience occupiers often will not believe the problem is self-inflicted. This plays into the hands of the rogue specialist damp companies).

It really is quite simple – as every home and method of occupation are so variable no one-solution-fits-all exists and therefore you need good quality advice. So, will you take advice from an impartial Chartered Surveyor or rely upon Bob the Builder or a company salesperson from a Dampness Contractor? The choice is yours.

SERVICE LEVEL CHANGES:

PROinspect are proud to announce that acting on customer feedback we have changed to way we deliver part of your Property Survey advice. Let me explain …….

If a client asks us to act for them, typically as a Consultant Surveyor upon a house purchase, we inspect-and-advise that client within a written report.

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Change 1 – we will ‘report” to that client by electronic means if at all possible.

Change 2 – if, for example, the main walls suffer from a problematic damp proof course we report the facts, the damage and the course of action that client needs to take and this in contained within our REPORT. In future we will also refer that client to our EXTENDED ADVICE “TAB” at our web-site. This area of our web-site provides the client with contextual background information and opinion plus links to others’ web-sites. By this method the client obtains a more balanced service from us, obtain a greater understanding of the defects and solutions and will therefore be better able to prioritise further actions and repairs.

Change 3 – rather than make that data confidential and only available to paying customers we have separated out the specific property data evidence and photographs etc…. but the scenario advice is freely available to any visitor to our web-site. A non-client web-reader will see advice and opinion but will not benefit from any individual property survey report, effect on premises value, mortgagability and saleability etc..

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PROinspect believe this is the way forward and is another way whereby we demonstrate our market leader, Expert status.

We still have some work to do to complete this change: we have currently scheduled the following Subject HEADINGS -

• CONDENSATION
• RISING DAMPNESS
• SUBSIDENCE
• ROOFING
• FLOOD RELIEF ISSUES
• INAPPROPRIATE WORKS
• CONSERVATION ISSUES

When we have completed all aspects of these subjects we may look to include others: IF YOU COULD HELP and submit such technical articles (on your own related Specialism) to augment this series, PROinspect would love to hear from you.

We are also looking to reciprocate business and are looking for certain types of trades and new contacts: EG: we need (1) Heating Contractors prepared to act quickly to check and test house boilers/systems in order for house price negotiations to continue, (2) Contractor underpinning and above-ground-wall-repair Specialists, (3) Chimney Sweeps, (4) Jobbing Contractors for basic maintenance repairs, (5) Flat Roof specialists, (6) Lime-Mortar repair specialists, (7) Period Timber Frame repair specialists (8) Asbestos diagnosis and testing plus reporting specialists, (9) etc………..

WE HAVE A PASSION FOR RESIDENTIAL BUILDING ISSUES, CAN YOU HELP US HELP OUR CLIENTS?

Looking for prime advice? I invite you to contact me for free further opinion and advice. Either use the CONTACT FORM above or call me on +44 (0)1489 896 174. Stuart Parrett.

click on the links for professional advice on…

• CONDENSATION
• RISING DAMPNESS
• SUBSIDENCE
• ROOFING – LEAKS
• FLOOD RELIEF ISSUES
• INAPPROPRIATE IMPROVEMENTS
• CONSERVATION & PERIOD BUILDINGS

If you think you can help – submit comments but we do reserve the right to adapt any material submitted to us to publicise within this site. Do not submit unless you agree to this caveat/term.

If you can add to these articles PROinspect would welcome your views.

NEED ADVICE?

Try the SEARCH Box facility (below, left), click on an Article Heading (below, left) or simply read on….

• BUILDING SURVEYS with or without VALUATION advice
• HOME VALUATIONS by an RICS Registered Valuer
  
• HOMEBUYER REPORTS or SELLER SURVEYS
• AUCTION or QUICK-WALK-THROUGH Appraisals
  
• Update your BUILDING INSURANCE SUM INSURED
• Is DAMP REALLY DAMP or actually CONDENSATION as a result of your lifestyle?
• Is that CRACK the beginnings of SUBSIDENCE?
• Divorce or Negligence Court-Compliant EXPERT WITNESS Reports/Valuations.

Hello, I’m Stuart Parrett. I am a truly independent, knowledgeable and experienced Chartered Surveyor and housing specialist. I am in the PEOPLE and HOMES Business where Information Discovery is all important.

I survey homes for faults and worth/value but it is not what I do but HOW that separates PROinspect from competitor surveyors.

THE HOUSE DOCTOR IS IN:

HOW CAN I HELP YOU?

SOMETHING of VALUE for you —-

1-  Do you have a SEPTIC TANK DRAINAGE system?

NEW Environmental Permitting Regulations cover even old septic tanks, which may previously have escaped regulation, but are now controlled and must be formally registered with the Environment Agency by 1^st January 2012. Failure to register is a criminal offense. Click this link PrivateDrainageChanges2012 for an Environment Agency Brochure that explains all.

2-  CONDENSATION SEASON IS UPON US – have you looked in the back of the wardrobe recently or in “that corner”?

Cold = drop in dew point = cold surfaces will attract condensate: Quick Fix – create airflows and reduce the amount of vapour in the air. Longer Term Fix = Raise the wall temperature by lining it with XXXX; properly kill off mould spores; introduce sensors that apply venting or temperature changes to the environment. Simple.

What often works is opening the window for as long as possible during and after sleeping/baths/showers/cooking (this removes water vapour that then cannot condense on your clothes and walls). You loose heat during this process and so you need to learn how to achieve these goals intelligently without icicles forming on your nose.

For more information on me, my CV etc… – click here and scroll down. Alternatively, look me in the eye by watching a short VIDEO – CLICK HERE. TheHouseSurveyor at YouTube will also deliver several important messages for those looking to purchase or those you wish to become Residential Surveyors and/or Valuers.

Those who have kindly provided testimonials for me say that I can be considered a safe pair of hands, somebody who is a real communicator and a provider of detailed and robust opinions.

Good reasons for using me in the central south coast area include that I take the time to listen to you and then help you make the right choice of survey product and have it completed at the right time. After this I genuinely communicate with you and don’t simply mail a report to you and that is it. No, I am always available for questions and meetings because you need to be re-assured your purchase is both a wise investment and you are not buying a problem.

I protect the biggest investment you’ll ever make in your life – your home – and I work with you every step of the way…..

I’ve brought together a lot of valuable information to help you organise property problems, alterations, private surveys and other services surrounding ownership, maintenance, sales, purchases and Expert Witness Reports.

CALL ME for a free chat and advice on 078 3636 3040 —

• THE GOLDEN RULES OF SELF-PROTECTION DURING HOME BUYING =

1. When your “offer” has been accepted make sure you already have a loan deal secured in principle
2. Make sure you DO NOT agree to a combined Loan Valuation and Private Survey
3. Actually speak to a Surveyor (PROinspect down south) – do not accept an Assistant or a Secretary
4. Find out your Survey Product options, fee costs and the manner in dealing with any special concerns you have
5. Do not fall for quick deals or “linked” services often packaged by costly middlemen Agencies.

STUART PARRETT

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Browse the site and when you’re ready to ask for advice give me a call or fill in the Form on the right. To get the best out of us you need to be briefed as to your options, survey costs and a lot more. As a starting point be as specific as you can as to what you need from us – use the CONTACT FORM (top right on your screen): EG: Detached house – perhaps 50 years old – £400,000 agreed – Building Survey with Valuation needed – being sold by XXX Estate Agents.

PROinspect are led by Stuart Parrett who has an unrivalled pedigree as a specialist Home Surveyor of over 35 years Hampshire experience.

If you wish to read even more of my views on a host of house and survey matters go to ezinearticles.com by clicking of the above icon. Or follow me at Twitter (@SurveyAuthority).