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Author Topic: Construction in Adverse Weather Conditions  (Read 10970 times)

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windrider

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Construction in Adverse Weather Conditions
« on: January 03, 2014, 10:20:19 am »
We reserved our house off plot in August and exchanged contracts with Charles Church in September. Our house had an estimated completion date of February 2014.

The house is timber framed which started to go up towards the end of November. We visit the site every week to see how things are progressing. Mid December, the men got taken off our plot to finish the other houses on site which were being completing just before the builders year-end.

Our house is currently at the stage where the second level has been completed but no roof. That means our plot has been left open for the entire Christmas period in this terrible wind and rain. I'm very concerned with the overall condition. Especially the insulation on the party wall  which has been more exposed due to the wind direction.

I have a meeting with the site manager on Monday to discuss my concerns and hopefully get him to replace the insulation and protective membrane once the building is weather tight.

Is this the best course of action to take or should I be taking a different approach?

Thanks,

Windrider.


Philofacts

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Re: Construction in Adverse Weather Conditions
« Reply #1 on: January 04, 2014, 11:33:16 am »
Firstly, I find it somewhat strange that the carpenters erecting the timber frame and roof trusses would be taken off to presumably expedite second fixing for the end-of-year rush job houses.
It is unlikely they would have the tools, skills or precision required.

It is totally unacceptable that your home should be exposed to the extremes of the weather, especially at this time of year.

A good house builder would properly plan their works, to ensure that as homes are constructed, they are exposed to adverse weather for the minimum amount of time.
A good site manager would also ensure that homes required for builder's year-end are planned and constructed in good time and not rushed. Failing this, he should ensure he has sufficient labour on site to meet the increased programme demands of year-end.

Bearing in mind that one of the few advantages of timber frame is speed, I find it amazing that the timber frame could not be erected and roofed weather tight within 5 days at the most - less if a crane was used.

What you now have is a totally saturated home that will takes many many weeks to fully properly dry out.
You should inform the site manager that on no account should the frame be insulated, the vapour barrier fitted and drylined (plasterboard) until the moisture content of the timber studs is at 20% or lower. This reading should be taken at the sole plate, which is always the last place to dry out.

You should also be ware that the flooring will need to be replaced as even with protection it will have become saturated.  Moisture resistant flooring does not mean waterproof! 
The composite floor joist may also need to be replaced as their integrity may have been compromised, they are not supposed to be drenched and permanently wet.

Finally, you should also be aware that as saturated timber dries out, it shrinks, twists and warps. 
This can and will cause all sorts of issues after you have moved in.
(Bowed walls, excessive cracking, sticking windows and doors, mould, condensation etc.)

If you can, I would cancel altogether.
You don't want to buy a new home on a site as badly organised as this one and Charles Church (aka Persimmon) do not have a great reputation for building quality homes either.

It is a pity you did not find this website earlier, especially the when to buy and timber frame homes what you need to know

I doubt very much that this home will even be dry by the end of February, let alone ready for you to move in!
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windrider

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Re: Construction in Adverse Weather Conditions
« Reply #2 on: January 06, 2014, 09:52:39 am »
Thank you for taking the time to reply back Philofacts, much appreciated!  :)

I was very surprised too when work seemed to halt on our plot  and the neighbouring  plot. Absolutely nuts!
I'm not a builder but even I had the common sense that buildings shouldn't be left open to this terrible weather.

I have written down your comments to take with me this evening. I too have also read that the moisture content should be 20% (NHBC guideline?) so I will be enforcing this point.

I will update you tomorrow and let you know how I get on. You will be pleased to know I already have a snagging inspection preliminary booked, which was a pain to get them to agree to!

Philofacts

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Re: Construction in Adverse Weather Conditions
« Reply #3 on: January 07, 2014, 11:02:47 am »
You are correct the 20% maximum moisture content is an NHBC standard:
"VAPOUR CONTROL LAYERS
6.2 - S6  Vapour control layers shall be correctly installed 
Before fixing a vapour control layer the framing timbers should have a moisture content of 20% or less.
The vapour control layer should be fixed on the warm side of the insulation and frame."


It is also a requirement of TRADA and in all probability, the timber frame manufacturer's requirement for their warranty too.

The roof trusses and felt and battening could have been completed in a day, two at the most.
Windows and doors could have been covered with polythene to keep the weather out over Christmas too - if indeed anyone actually cares anymore!
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