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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Carpentry Questions >> Part M Threashold https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1240339209 Message started by birty on Apr 21^st, 2009, 7:40pm

Title: Part M Threashold
Post by birty on Apr 21^st, 2009, 7:40pm

Urgent advice needed. Front door to new build. Seem to remember that threashold cannot be more than 15mm???? Checked out Part M for dwellings and cant find any referance to this only door width on approach to house.. I think its the Manufacturers say threashold has to comply.. Please advise as door being fitted on Sat and I have the standard gradual ramped one to 40mm high one that came with door or a Part M one from Stormseal gradual ramp up to about 25mm(AM3) . Fitting tiles in side the enterance and they will be too high for stormseal one!!! Help. Dont wanna ask Build cont and draw there attention too it!!! :-?

Title: Re: Part M Threashold
Post by CWatters on Apr 21^st, 2009, 9:03pm

Says 15mm here...

http://www.igdoorsltd.co.uk/frame_partm.htm

We opted for a cast concrete/stone cill with a <15mm high weather bar on top. Something like this but not in gold...

http://www.toolstation.com/shop/Hardware/Draught+Excluders/Threshold+Sill+933mm+Gold/d170/sd2802/p41321

On the outside we formed a simple slot drain to stop water being blown under the door. You can buy linear drains for the purpose or form them easily using paving slabs or whatever you propose to use on the path itself.

http://www.aco-technologies.com/product_search.php?cat_6=28&cat_8=99

Sorry for all the edits to this post. Was looking for this drawing..

Title: Re: Part M Threashold
Post by birty on Apr 21^st, 2009, 9:10pm

I know manufacturers say 15mm but part M doesn't!! Where are they getting it from???? I have something similar to that one in the pic but ya cant run tiles up against it internally............

Title: Re: Part M Threashold
Post by CWatters on Apr 21^st, 2009, 9:19pm

Ah I see. I'll have a look and see if I can fin where the 15mm comes from.

Title: Re: Part M Threashold
Post by WOLF on Apr 21^st, 2009, 9:23pm

Try this guys...

http://www.igdoorsltd.co.uk/frame_partm.htm

Title: Re: Part M Threashold
Post by CWatters on Apr 21^st, 2009, 9:37pm

In the section on dwellings page 65 section 6.19 it specifies an "accessible threshold". On page 66 it refers to a document called:

"Accessible thresholds in new housing: guidance for house builders and developers" published by the HM stationary office.

I think you have to pay for that document but there is an extract here..

http://www.nevko.com/pages/nevko_building.htm

Quote:

Accessible Thresholds in New Housing (extracts) - UK
Guidance for housebuilders and designers - Published by the Stationery Office

Weather-proofing

2.6 The external leading edge of any proprietary threshold should be no higher than 15 mm, and rounded or chamfered when more than 5 mm, to provide a smother transition for wheelchair users.

That appears to be consistant with Part M section on "Buildings other than dwellings" eg Page 27 para 2.7 says...

Quote:

e) The threshold is level or, if a raised threshold is unavoidable, it has a total height of not more then 15mm, a minimium number of upstands and slopes, with any upstands higher than 5mm chamfered or rounded;

Part M link for reference..
http://www.planningportal.gov.uk/uploads/br/BR_PDF_ADM_2004.pdf

In other words the threshold requirement are similar for dwellings and non dwellings. Although why they couldn't say that in Part M beats me.

Title: Re: Part M Threashold
Post by CWatters on Apr 21^st, 2009, 9:38pm

TIMBA-WOLF wrote on Apr 21^st, 2009, 9:23pm:

Try this guys...

http://www.igdoorsltd.co.uk/frame_partm.htm

Is there an echo in here ;D

Title: Re: Part M Threashold
Post by birty on Apr 22^nd, 2009, 8:01am

Well done Mr Watters. Again a invaluable tool in an ever frustrating world!!! Why the hell aint that in Part M??? Still leaves me with the problem of inch tiles on the inside though!! They will be higher than the threashold!!! Rumour has it the BC officer of mine dont look to closely anyway... :)

Title: Re: Part M Threashold
Post by CWatters on Apr 22^nd, 2009, 8:57am

If the tiles are higher the bottom of the door must also be higher or it will hit the tiles when opened. Therefore the threshold seal has to be raised above the level of the tiles anyway. If you use a 15mm thick threshold seal it can sit on top of the tiles or at least at that height. The real problem sounds like the ramp outside is too low? Check the height of the lintel above the door as wll (eg if the door can't be cut down).

Title: Re: Part M Threashold
Post by birty on Apr 22^nd, 2009, 9:26pm

mmmmmmmmmm. greeat this disabled thing... give me the head of the guy who said lets make 'everyone' comply..........

Title: Re: Part M Threashold
Post by Twobarrows on Apr 22^nd, 2009, 9:50pm

birty wrote on Apr 22^nd, 2009, 9:26pm:

mmmmmmmmmm. greeat this disabled thing... give me the head of the guy who said lets make 'everyone' comply..........

Well there must be millions of disabled people in Fleet, cos there are millions of parking spaces for them!

Title: Re: Part M Threashold
Post by CWatters on Apr 23^rd, 2009, 6:59pm

The thing is it's not difficult to comply. Particularly if it's a wooden door with concrete or fake stone cill. Just leave the cill out until you know the FFL then set it in place so it's the same level. Fit the weather strip on the top, build the ramp outside.

We've been in our house two years and I prefer it to having a cill you have to step over.

Title: Re: Part M Threashold
Post by The_Trician on Apr 24^th, 2009, 5:11pm

Ferk the wheelchair fascists.

Making it weather and damp proof is more important.

Bloody bureaucrats.

TT