Hello, I am going to be removing some old doors and intalling a set of upvc sliding patio doors (2400mm w x 2100mm h). The property owner has said that there is no existing lintel and he wants a lintel installed (We'll be installing a concrete lintel). I have ordered the doors the same size as the original doors which went quite high up on the wall from memory. I fear I should have deducted 65mm from the new doors height to account for the 65mm x 100mm x 3000mm concrete lintel that we need to install. If when we come to install the doors, the roof rafters come to right above where the doors will be, with no space for the concrete lintel what do we do? Is a solution to cut a birdsmouth at the end of the rafter so we can fit the lintel in or any better suggestions?
No space for Lintel
- Thread starter Ps67
- Start date
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Why does he want a lintel where the previously was none?
Presumably becaause the existing window is acting as a lintel for the rafter ends, so one should be fitted now, as a upvc window is not a structural item. Sounds like somebody screwed up, 65mm deep doesn't seem deep enough for that span. I'd think you'd be looking at 100mm deep minimum, are BC involved? They should be if a new lintel is being fitted. Anyway seems somebody's screwed up and the window head needs to be lower to accommodate the lintel.
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If there's no lintel now then you have to lower the window head to fit one in, can you fit a lintel to the inner skin instead? You can birdsmouth the rafters a bit but not if they're the same depth as the lintel. Is the wall rendered? Otherwise a concrete lintel is gonna look crap.
Lift the roof up!
Are you sure they even make a concrete lintel that size?
No the wall is brick but the aesthetics is not an issue now.
Yes
Behind the fascia there is a piece of timber going horizontally across. I think underneath that there is a thin slither of timber probably put in to act as a lintel. The doors I have ordered are the exact same size as the existing ones shown. Surely somebody's got a suggestion. Breaking the ground beneath and lowering where the new door will sit I don't think is an options as we'll be lower than existing ground level then. One solution I'm thinking of is to cut the new door frame 30mm off top and 30mm off bottom. Might not be the best idea but open to any suggestions.
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A concrete lintel seems an odd choice, probably not strong enough and chuffing heavy in that length.
A steel angle maybe possible or box section on the inner skin as the wall plate will be higher.
if it’s tight you could use a steel angle and cut a slot at each rafter birdsmouth to create a bit of space.
A steel angle maybe possible or box section on the inner skin as the wall plate will be higher.
if it’s tight you could use a steel angle and cut a slot at each rafter birdsmouth to create a bit of space.
Ah, you don’t have rafters, it’s a flat roof….hardly any load at all.
don’t the joists go side to side?
No lintel required! use a piece of angle iron if you need to satisfy the customer.
Could you send a link of something appropriate? The doors are 2400mm wide
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