Concrete vs Timber Floors There are 2 types of floor construction used in the building industry today;The existing concrete floor can be used as a base, however a new damp proof membrane (DPM) will need to be introduced DPMs come in solid or liquid form, the latter being a practicable solution for a garage conversion Manufacturers will be able to advise A suitable gauge damp proof membrane (DPM) and thermal insulation must be providedDamp proof membrane (DPM) On suspended timber floors the floor construction occurs, the insulation should be cut back and a timber batten of the same thickness as the insulation inserted to reinforce the edge Where acoustic insulation is required, the batten thickness
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Dpm suspended timber floor insulation
Dpm suspended timber floor insulation-Underfloor thermal insulation of suspended timber floors involves removing the existing pine floorboards or any other type of boarding This to eliminate the empty spaces between the joists that allow the cold draughts to reach the subfloor A galvanised mesh bed is fixed between the joists to properly hold in place the insulation • Timber floor boards eg tongue–and–groove 18 mm thick plywood, should then be laid over the insulation and battens with staggered cross–joints in accordance with DD ENV 00 • An expansion gap of 2 mm per metre run of floor, or a minimum of 10 mm overall, whichever is the greater, should be provided between the floor boards and the perimeter walls
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Celotex GA 4000 Floor Installation Guide As upper mentioned, Celotex GA 4000 insulation boards can have a number of different application, why they can be successfully installed in concrete slab floors, beam and block floors and suspended timber floors, which will all be discussed right here Concrete slab floorsThis chapter gives guidance on meeting the Technical Requirements for suspended ground floors including those constructed from insitu concrete precast concrete timber joists 521 Compliance 522 Provision of information 523 ContaminantsIn ground floor applications such as concrete slabs and beam and block applications, a VCL is required on the warm side of the insulation This will also help protect the insulation from wet screed or concrete Suspended timber floors are slightly different There are differing opinions around whether to introduce a VCL or not, and where to
So what exactly is a damp proof membrane (DPM) used for?Suspended Timber Floor 1 Install joists in the normal manner, ensuring adequate ventilation 2 Measure gaps between joists and cut Insulation with Perimeter strips DPM 10 gauge Polythene or Radon barrier Beam and block suspended floor Perimeter/Area Ratio (P/A) Thickness (mm) 050 060 070 080 090 If a suspended timber floor is in place, then this can be insulated as shown in our how to video 'How to install Kooltherm K103 Floorboard from above joists in a suspended timber floor' For a solid floor, specific attention should be paid to the construction of the wall, and especially considering if a damp proof course (DPC) is present, as this might not be the case in
The existing concrete floor can be used as a base, however a new damp proof membrane (DPM) will need to be introduced DPMs come in solid or liquid form, the latter being a practicable solution for a garage conversion Manufacturers will be able to advise A suitable gauge damp proof membrane (DPM) and thermal insulation must be provided43 Suspended concrete or timber groundfloors incorporating the insulation boards must include suitable ventilation of the subfloor void or a dpm 44 When used as insulation in suspended timber groundfloors, for optimum thermal performance, the product shall be installed with the correct orientation of its foilfacing Floors are constructed in two ways, either suspended or solid Suspended timber floors consist of floorboards nailed to joists, often carried on 'sleeper' walls of brick It is important that the underside of a suspended floor is ventilated to avoid the build up of moisture
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Method 1 Damp proof membrane (DPM) • A DPM should be provided beneath the screed or insulation;If appropriate, lay a damp proof membrane (DPM) (normally 10g polythene sheet/300g micron), to the top surface of the beam and block floor Level the surface of the floor;A damp proof course (DPC) should be placed between the timber and the wall Insulation is then placed between the joists (thickness depends on the product used) Air vents should be placed underneath to provide ventilation to the void and the air should be able to travel from one side of the building to the other Suspended concrete floor
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• Radon barrier/DPM & DPC • Insulation • Sub floor Main Floor Types Suspended Timber Floor Above is a sketch of a Suspended Timber Floor The main materials used in the type of floor is Concrete and Timber Since timber is being used, rot can become a major issue Hi It is ok to put a DPM/membrane on the floor and the the Celotex on top Years ago you could get away with timber battens to fix the floor to but not Post a job Homeowners Post a job How it works About us Suspended timber floor insulation / underfloor heating Insulating suspended timber floors vapour barrier or no vapour barrier?
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Materials For Suspended Timber Floor Insulation There are three main options Celotex / Kingspan type PIR thermal insulation board This comes in various thickness (50mm and 100mm are the most common) and in a variety of sizes (24 x 12m being the most common)NHBC requires ground floors to be constructed as suspended floors in the following situations where the depth of fill exceeds 600mm, as described in Chapter 51 'Substructure and ground bearing floors' (Design) where soil swelling may occur, as described in Chapter 42 'Building near trees' on sites which have been subject to vibratory groundFloor Insulation Systems are used below the floor slab, lay the hardcore in layers (min mm) Each layer should be wellcompacted with the surface blinded with quarry dust or sand to provide a suitable surface for laying a DPM (damp proof membrane) A DPM, eg 10 gauge polythene, or a radon
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The flexible nature of mineral wool accommodates movements in floor ensuring all joints remain closed Note The Uvalues have been calculated assuming that the timber joists are 48mm wide at 600mm centres with a default fraction for the timber floor of 011 taken from BR443 Floor covering assumed as 18mm chipboardThis is how the renovation all started so at least we had a tried and tested method to use We had intended to Traditional ground floors have consisted of little more than a few flagstones or bricks placed directly over the soil The Victorian era saw the widespread introduction in mass housing with suspended timber floors, alongside rudimentary solid floors in hardwearing areas such as kitchens and hallways This combination persisted well into the 1930s, with solid concrete
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