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Tagged: architect plans, architect uk, Building Inspector, Building Plans UK, loft conversion head height, Loft Conversion Plans, Velux Window Loft Conversion
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Architect got the pitch of the ridge incorrect
Posted by Marcus Robson on January 4, 2026 at 12:02 pmHi All need some help and advice please
long story short as my property has a cat slide roof to the front my Architect got the pitch of the ridge incorrect, the steels and floors are now all in but the stairs wont comply, once insulated and plastered i will be left with 2.05m on the ridge and around 1.55m around the shoulder height, ceilings below have been reduced to 2.35m, drop landing will only give an extra .0.20m, the stairs positioning cant be changed as the steels are in, anyone have any ideas please
Marcus Robson replied 3 months, 3 weeks ago 10 Members · 10 Replies -
10 Replies
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Easy.. put your architect on notice of claim with his insurers , get the work rectified and corrected and involve planning and building insurers and your architect or his insurers
Will need to pay.
Youve paid for a professional service and he has failed you
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Velux above the stair well and /or a staircase with a top landing then one step up from the landing into the room. you need two meters head room but it can slope away to 1.8meters at the side
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Use celetex allowing 50mm behind for airflow and superquilt stapled onto rafter with 20mm counter batten and 12.5mm plasterboard best you’ll get
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It’s not just down to architects. This is a issue the builder should have picked up. All this is a joint enterprise be it the project manager architect structural engineer which I assume would have just went off architects drawings then your builder as there’s no way the architect would be certain down to the mm due to many reasons until it’s all bare. There’s plenty of disclaimers so good luck about pursuing any legal claim. Everyone is going to deny fault. It should never have got to that before you’ve encountered this issue.
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Should have used a real builder. And I’d put it back to the architect as it’s his fault. You’d certainly go back to the engineer if the steel fell down wouldn’t you??
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Is the ridge beam steel set above the existing ridge or just below the top of the apex ?
If its just below to top of the apex of the existing roofline then its your floor joist that has been installed to high
Tbh without the input of your architect and installer its easy to shift the blame
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Hmmmm, doubt any architect would get it that wrong.
So easy to check the head room dimensions from plan view up onto the side section of the roof using cad, SketchUp etc (whatever the preference)
They usually state if in doubt ask… builder has likely take the easy option in the floor and gone over the top of everything , summer beams etc without having the foresight to the end result of the stairs being to tight.
This is why a loft specialist is always advisable , that’s said a few lads who used to work for me set up and have already folded so make sure you always get the company
Possibly a VELUX Over the stairs would help
Put the plan on here , may help could reduce the top of the stairs winder bringing the right side over
Also , may sound ridiculous but use a laser level line to measure the head room.
Quite often if the tape runs out of level it can add or reduce a few cms, all adds up in a loft conversion
But yeah without plans your asking us tricky question
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Speak with the building inspector, there may be a compromise as the stair will still be better than a compliant ‘ships ladder’ access or alternating tread stair. A velux would probably give enough headroom for a compromise. Remember the diagram is only ‘guidance’ not law.
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Thanks all for your comments, building inspector will be out to advise and assess with a drop landing and velux
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