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First post on here so hello to you all!
I need to change an old timber lintel over my livingroom internal door to a reinforced concrete type to stop the plaster cracking due to the expansion and contraction nature of the timber and the fact that plaster doesn't adhere well to it.
It is a bungalow but the lintel in question is on a single skin supporting wall that runs up to the roofline. I was planning on hiring 2 strongboys to support the blockwork from the livingroom side enabling me to work from the hall side.
Im a little unsure regarding bedding and packing the lintel. The timber lintel is 95mm high but the replacement concrete lintel is only 65mm.
What is the correct way to install the lintel?
1 - Bed of mortar on top of the lintel, offer into place then pack up tight from underneath with slate and then back fill the voids underneath with mortar?
2 - Install lintel dry (no mortar on top) and pack up tight underneath with slate then backfill voids underneath with mortar.
3 - Another way?
Am I correct that if you rely solely on mortar beds top and bottom (no slate) you could get shrinkage issues as the mortar dries resulting in the lintel being loose?
It will be a 1200mm wide lintel giving a 150mm bearing on either side. There are currently no padstones and the timber is sat directly onto the blockwork the same as the concrete lintels are over the other doorways. I think they used timber as it was originally a door with a framed glass panel next to it and probably didnt have a wide enough concrete lintel so just threw the timber in, it was the 60's! The timber lintel is approximately 1600mm wide so might buy the same length in concrete giving larger bearings either side or just stick with the 1200mm lintel and brick in the remaining voids.
Hopefully someone experienced can guide me in the right direction.
Cheers
I need to change an old timber lintel over my livingroom internal door to a reinforced concrete type to stop the plaster cracking due to the expansion and contraction nature of the timber and the fact that plaster doesn't adhere well to it.
It is a bungalow but the lintel in question is on a single skin supporting wall that runs up to the roofline. I was planning on hiring 2 strongboys to support the blockwork from the livingroom side enabling me to work from the hall side.
Im a little unsure regarding bedding and packing the lintel. The timber lintel is 95mm high but the replacement concrete lintel is only 65mm.
What is the correct way to install the lintel?
1 - Bed of mortar on top of the lintel, offer into place then pack up tight from underneath with slate and then back fill the voids underneath with mortar?
2 - Install lintel dry (no mortar on top) and pack up tight underneath with slate then backfill voids underneath with mortar.
3 - Another way?
Am I correct that if you rely solely on mortar beds top and bottom (no slate) you could get shrinkage issues as the mortar dries resulting in the lintel being loose?
It will be a 1200mm wide lintel giving a 150mm bearing on either side. There are currently no padstones and the timber is sat directly onto the blockwork the same as the concrete lintels are over the other doorways. I think they used timber as it was originally a door with a framed glass panel next to it and probably didnt have a wide enough concrete lintel so just threw the timber in, it was the 60's! The timber lintel is approximately 1600mm wide so might buy the same length in concrete giving larger bearings either side or just stick with the 1200mm lintel and brick in the remaining voids.
Hopefully someone experienced can guide me in the right direction.
Cheers
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