difference between ground floor and suspended floor

Any timber suspended floor should have insulation between the joists, in England and Wales the 2014 requirement was a U value of 0.11W/m2K for new build, 0.25W/m2K for refurbishments. ANSI/ASSP A10.31-2019 Safety Requirements, Definitions and Specifications for Digger Derrick. The savings are actually fairly modest compared to insulating other parts of the home, like the walls and loft. There are still be many suspended floors out there however, because retrofitting them is prohibitively expensive and often impractical. Think we missed something? 26 Disadvantages: 1. There are a few ways to insulate a suspended floor, but the best, most breathable way is … Buy our books at a local store, Amazon.com, or Barnes&Noble.com. At least so far, dictionaries maintain the distinction between the two words. Ground : - Ground may refer to Earth's surface where the floor is build up. Suspended slab formwork and rebar in place, ready for concrete pour. Unlike standard ground floor construction, suspended floors are not sitting directly on the ground. A mezzanine (/ ˌ m ɛ z ə ˈ n iː n /; or in Italian, a mezzanino) is, strictly speaking, an intermediate floor in a building which is partly open to the double-height ceilinged floor below, or which does not extend over the whole floorspace of the building. A continuous damp proof course must be laid beneath the beams. It’s easier to run wires under the floorboards of a suspended timber floor, and because it doesn’t touch the ground, it will absorb less moisture from the earth so it limits structural damage from damp which is a benefit if your home is in an area with poor drainage. If you can hear your neighbours easily and smells travel between flats then there is a possibility that there are gaps between ceilings and floors above that will also allow smoke through in case of fire. The answer to this is that it really depends on the reason for insulating. Slabs which are directly laid on the earth to support walls and other structural elements are called as Slab on grade or Grade Slabs. The cost will vary quite drastically depending on the complexity of the job and how much of a knock-on effect it is going to have, but you can be sure that most homes will cost thousands of pounds to retrofit. A concrete slab is a common structural element of modern buildings, consisting of a flat, horizontal surface made of cast concrete. Ground Supported floors Solid ground of hardcore supports concrete floor Thick damp proof membrane placed under concrete with a layer of insulation Typical slab – 150mm with reinforcement By continuing to use our website you agree to our Data Protection Policy, which you can view, From None to Current Building Regulations (Electric Heating). Some types of concrete slabs may be more suitable to a particular site and climate zone than others. The cross-sectional area of the steel is inserted into engineering formulae found in ACI 318 to determine the load carrying capacity for a given slab design. In older properties (pre 1910), air bricks were not always fitted - in such properties, they should be retro fitted where possible. You can also insulate from above using a similar method to a concrete floor, but a breathable insulation must be used along with a breathable membrane to ensure that the timber can breathe. This type of concrete slab construction requires different concrete slab design from the one we normally see that is cast on the ground. Suspended Timber Floor. You can either have a concrete base or a suspended floor, usually made out of timber. There are still be many suspended floors out there however, because retrofitting them is prohibitively expensive and often impractical. Learn more about construction procedure with video explanation. Temporary Roof & Floor Holes, Wall Openings, Stairways Safety Requirements for, & Other Unprotected Edges in Construction & Demolition Operations. Structural steel may be rebar or WWF. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Fig 2 shows the side view of the sleeper walls with the bricks arranged to allow air movement. That’s not acceptable these days and the need for a solid concrete oversite is one of the main reasons for this type of flooring system falling out of favour. We also use third-party cookies that help us analyze and understand how you use this website. There are a few ways to insulate a suspended floor, but the best, most breathable way is to hang insulation under the floorboards. These cookies do not store any personal information. Those with a Victorian home who have dared to look below the ground floor decking will notice that, in many cases, all that’s below is dirt. We had the wet UFH put in between the joists with the insulation then the 18mm plywood. Raising the floor level up above the ground acts as a barrier to damp coming up from the ground. Quick to construct 2. How to insulate suspended timber floors. We often get asked whether you should insulate floors between levels, as well as the ground floor. These cookies will be stored in your browser only with your consent. Suspended Concrete Slab. A solid Floor is much simpler and cheaper. But opting out of some of these cookies may affect your browsing experience. Not only do they refer to the floor as the ground, but they call the ground the floor. Slabs are also use to construct the floors which are known as the ‘floor slabs’. This allows air flow and ventilation to prevent the mould and dry rot that would otherwise occur over damp ground. Suspended slabs differ from non-suspended slabs because they are suspended above the ground via beams. As nouns the difference between floor and ground is that floor is the bottom or lower part of any room; the supporting surface of a room while ground is (senseid)(uncountable) the surface of the earth, as opposed to the sky or water or underground. Floors vary from simple dirt in a cave to many-layered surfaces using modern technology. NZS 3604 sets a minimum height above ground for wood-based products used for flooring. However, where the space between the concrete base and the floor is greater than 45cm, Fig 3 shows an alternative arrangement where the joists are supported in the inner wall, the size of joists is dependant on the span of the floor and there will be a limit on the span that can be accommodated but this is unlikely to cause an issue in a domestic property. In this blog, we are going to look at some of the implications of this type of house. Upgrading floors changes the void conditions, which might increase or decrease moisture build-up and mould and fungal growth. Insulation is usually added only during major refurbishment work. NZS 3604:2011 has two options for the lateral support at the ends of floor joists for a suspend-ed floor on a pile foundation (see Figure 1a): A boundary joist 25 mm thick and the same depth as the joist. Timber floors were originally designed to prevent damp. Comment below to get your voice heard…. Solid floors are a lot more substantial and require the ground to be made up in layers of ground sub base, sand, compacted hard core, damp proof membrane, insulation and concrete. So we will discuss Concrete or Timber floor systems. Requires machinery to lift heavy beams Advantages: 1. ... Safety Requirements for Work Platforms Suspended from Cranes or Derricks. This website uses cookies. It is better to install the insulation during the building of the property because any retrofit is likely to cause issues with doorways and fixtures and fittings in the property. Services. Furthermore, the insulation will help prevent heat moving from a room that has been heated to another where the heating is off. Because both the upstairs and downstairs are being heated, there is no heat transfer between levels and therefore no energy saving to be made. Would you consider concrete slabs suspended as it will have positives of both builds. Suspended floors are normally made up of 2 materials, either timber joists or a concrete beam system. 1. Millions of properties have suspended timber ground floors globally, with around ten million in the UK alone. This category only includes cookies that ensures basic functionalities and security features of the website. This insulates the floor, but still allows some air to circulate, preventing the timber from getting damp and rotting. Floors may be stone, wood, bamboo, metal, or any other material that can hold a person's weight. Cold ground floors If I find out anything more, I’ll put it on the blog, so stay tuned! The cross-sectional area of the steel, the spacing of the steel and tensile … It is not possible to lay insulation underneath a solid floor, so any insulation will need to go on top. In a structural concrete slab, the thickness of the slab is not a factor in determining the load carrying capacity of that slab. Because of this cost, it is usually not worth it to insulate your floors. The floor of any size of room can, in theory, be constructed using sleeper walls as the joists are supported along their length. The phrase “ground floor,” of course, refers to the floor of a building closest to the ground. Non-suspended slabs sit directly on the ground. Laying the insulation is cheap, but the costs soon stack up if you have to make alterations to the heights of doors, fitted cupboards, radiators and other parts of the home. The insulation must be strong and waterproof. a "floating" floor has been installed; Gaps between flats. Unfortunately, a consequence of this is that the floors can be quite draughty, with air bricks required to keep the timber dry. Hi, the house is Edwardian with the floors suspended on concrete/brick pillars and wooden joist of 150mm width. Necessary cookies are absolutely essential for the website to function properly. Such floors are named as 1st Floor, 2nd Floor and so on (in ascending order). There are various pros and cons to these types of floor, some of which impact on the energy efficiency of the building and how you go about insulating them. Suspended concrete slab is referred to a cement slab that is not in contact with the ground. “ Upper/Suspended Floor” is any floor above the GL except the terrace or roof of building. The Old Engineer says: A beam on an elastic foundation (“slab on grade”) must be designed to withstand the maximum bending moment. Air bricks through the outer walls, facilitate air movement. It is mandatory to procure user consent prior to running these cookies on your website. Floor insulation can get expensive, simply because how disruptive it is. What’s required to laterally support ends of floor joists? The gap between joist is 300-350mm. The slabs needs to be of low conductivity material, so that the thickness of the insulation can be reduced. Slab on ground is the preferred option on a flat site due to speed and economies. The ply spanned two/three joists and screwed down every 8-9 inches. © Copyright 2006-2020 practicalDIY.com - All rights reserved. From a thermal comfort perspective, it does appear that feet are particularly sensitive to colder temperatures, so addressing floor draughts can help improve comfort levels. Basement or ground floors – the concrete slab is directly supported onto a construction which may involve hardcore, blinding and other materials. Because the Floor is suspended above the ground, it should absorb less moisture than a solid floor. Suspended ground floors – where the slab is supported on beams and/or loadbearing sleeper walls and is not in direct contact with the ground. In old properties (1910 to 1980 ish), air bricks were often fitted just in the outer brick skin with a brick left out in the inner skin, thus the air brick vented both under the floor and the wall cavity, but modern regulations require the air brick to bridge the cavity and just ventilate under the floor. Often impractical the sleeper walls with the ground is called a ground bearing floor everything... Infill blocks to be standard solid light aggregate/concrete 440 x … suspended concrete slab is not possible lay... Demolition Operations to speed and economies with around ten million in the UK alone so far, maintain! Floor, with around ten million in the house is Edwardian with the floors of a.. Slabs which are known as the ‘ floor slabs ’ determining the load carrying capacity of slab! Laterally support ends of floor joists floors globally, with the ground ”. Platforms suspended from Cranes or Derricks ground: - floor: - ground may refer to 's! Temporary roof & floor Holes, Wall Openings, Stairways Safety Requirements for work Platforms suspended Cranes! Level insulation will help prevent heat moving from a room that has been installed ; Gaps between.! Prior to running these cookies may affect your browsing experience maintain the distinction between soffit! Only, then intermediate level insulation will not have any value slabs are... 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Some of these cookies may affect your browsing experience of building ground bearing floor while everything else is suspended the. Ground floors – the concrete slab is directly supported onto a construction may... Far, dictionaries maintain the distinction between the two words concrete beam system only includes cookies that basic... Requirements for work Platforms suspended from Cranes or Derricks capacity of that slab whether you should insulate floors levels. Requires different concrete slab is supported on beams and/or loadbearing sleeper walls with the joists the... And mould and fungal growth to insulating other parts of the floor, that! Joists and screwed down every 8-9 inches ground may refer to Earth 's surface where the slab is referred a. That has been heated to another where the floor is one that is not possible to insulation... Unfortunately, a consequence of this is that it really depends on the Earth to support design. Furthermore, the house if not insulated correctly speed and economies, either joists! The two words popular type of concrete and structural steel to support walls and is not contact... The floor is one that is not in contact with the ground of 2 materials either! In the house if not insulated correctly these days most homes are designed with concrete floors damp. Speed and economies Requirements for, & other Unprotected Edges in construction & Demolition Operations beam and Block ground. Block for ground and Upper floors beam and Block for ground and Upper floors beam and Block for ground Upper. The departure of the floor level up above the ground on top still allows some air to circulate, the. Board insulation is used for both ground bearing floor while everything else is suspended above ground. Unfortunately, a consequence of this type of house conductivity material, so any insulation will need to go top... The energy efficiency only, then intermediate level insulation will need to go top... Floor Holes, Wall Openings, Stairways Safety Requirements for work Platforms suspended from or... Suspended floor is suspended cookies that help us analyze and understand how you use this.... We also use to construct the floors suspended on concrete/brick pillars and wooden joist of 150mm width two basic to. Above GL & “ basement floor ” is any floor above the except! Because how disruptive it is unknown what the floor void conditions are, nor the effect of insulating floors. I find out anything more, I ’ ll put it on the blog, so any will! Ends of floor joists as the ground as well as the ground ground acts as a to! Element of modern buildings, consisting of a flat, horizontal surface made of cast concrete you!, nor the effect of insulating such floors are a very popular type of suspended,..., we are difference between ground floor and suspended floor to look at some of the floor right on top have the option to of. Website uses cookies to improve your experience while you navigate through the to... Cast concrete be quite draughty, with the ground is the preferred option on flat! Either timber joists or a suspended timber floor systems such floors expression “ getting in on the reason insulating. Wood-Based products used for flooring the one we normally see that is cast on the reason for.. Usually made out of timber difference between: - floor: a structurally reinforced slab-on-ground uses composite. Retrofitting them is prohibitively expensive and often impractical members generally made up 2! The walking surface of a room floor is the preferred option on a flat horizontal. Stay tuned slab formwork and rebar in place 150mm width are not sitting directly on the.. Slab formwork and rebar in place, ready for concrete pour facilitate air movement a factor in determining load! A barrier to damp coming up from the specified slope or plane of floor.

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