I have just received a quote for a 5 x 3 conservatory.
Please bare in mind this is only for the following.
Brick wall on footings.
Concrete slap floor.
1. Foundation L+M £3’350
Foundations to be 460mm wide Gen 1 concrete taken down to solid undisturbed strata thought to be Boulder Clay a minimum of 1.000m deep. Final depth of foundations to be agreed with local authority on site. Foundations not to impose any loads on new or existing drainage.
2. Wall erection L - £1’850 M - £1’977
Wall construction to be of 106mm face brickwork to match existing, 75mm cavity with 5Omm Kingspan Kooltherm K8, stainless steel wall ties 900mm horizontally and 450mm vertically staggered. 100mm Durox Superblocks internally finished with two coat light weight plaster. Felt DPC to BS 743 150mm above ground level and lapped to existing. 287mm cavity brickwork below DPC. Blocks to be bonded in accordance with manufacturer's instructions using 1:1:6 mortar mix with all necessary expansion and contraction joints. Wall insulation to overlap floor insulation by 150mm. Use Furfix profiles to bond new walls to existing.
3. Concrete floor L - £1’200 M - £1’100
Ground floor construction to be 38rnm sand and cement screed on 100mm Gen 1 concrete on 1000g polythene vapour barrier of 80mm Celotex on 1200g polythene vapour barrier linked to felt DPC in external walls on 150mm blinded well consolidated hardcore. Any drains passing under proposed building to be suitably protected with concrete lintels inserted where any walls pass over.
You should always get 3 quotes for larger jobs, so you can compare and understand what you are being charged for. It is almost impossible for someone to check a quote without being given the chance to come and see the work you need doing (and getting the full brief that you have given to the builder).
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