Materials Selection and Construction Considerations — REAL IELTS EXAM TEST 25 — IELTS Test

REAL IELTS EXAM TEST 25

Materials Selection and Construction Considerations

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(0:00) Now turn to section four. Section four. You will hear a lecture about how to choose flooring materials.
(0:12) First, you have some time to look at questions thirty-one to forty. (0:38) Now, listen carefully and answer questions thirty-one to forty. (0:46) We've been talking about choosing building materials in the last week.
(0:50) Now, a great many factors influence the choice of building materials. (0:54) You can't make a house of cards, right? And people who live in glass houses and all that. (0:59) Anyhow, today I'd like to say a few words about flooring.
(1:03) Some artificial materials can be used, like plastic for instance, which offer mixed blessings when used as a flooring surface. (1:11) On the one hand, plastic is cheaper than nearly any other alternative, short of bare ground. (1:16) Plastic also does not warp like wood.
(1:19) On the other hand, the best that can be said about plastic is that it looks like wood or stone. (1:25) However, it cannot replace the real materials. (1:28) As I have mentioned, I'm fixing up a new house.
(1:31) The decorator my wife hired told me plastic does a great job of looking exactly like plastic. (1:37) Besides, it scratches easily, fades or discolours and starts cracking within a year or two. (1:43) So, if you're fitting out a sleazy hotel or plan to live in a trailer park, go with the plastic.
(1:48) Really though, for all intents and purposes, this leaves us with wood or stone as choices for flooring. (1:55) Stone and wood are alike in at least one respect. (1:59) Both go through processing before they can be put to use.
(2:02) Since few of us cut our own lumber or quarry our own stone, this is not perhaps a pressing concern. (2:09) Still, do it yourself as wood do well to remember to buy only properly seasoned wood. (2:15) Unseasoned wood warps and a warped floor quickly becomes firewood and its owner quickly becomes poorer.
(2:22) Likewise, except for dull-hued materials like slate or sandstone, most stone floors are polished before installation. (2:28) The choice goes well beyond just wood or stone. (2:31) Each type requires many further considerations.
(2:34) A few special remarks are called for when considering wood, for example. (2:38) As always, aesthetics, personal taste and layout all play roles, as well as the type of house or room. (2:45) Oh, and certainly don't forget the cost.
(2:48) When it comes to cost, a rule of thumb is that the softer and less exotic the wood, the lower the cost. (2:53) In the US, for instance, pine is both ubiquitous and cheap. (2:57) Mahogany is imported and exorbitantly expensive.
(3:01) If you're on any kind of budget when remodelling, it's really helpful to remember to go for the softer woods. (3:06) Aside from cost, there are still lots of different factors that are important in choosing the best flooring for the job. (3:13) Continuing with the example of wood, one must consider the effects of each type of wood on the mood of the room.
(3:20) When selecting the best wood to use, particular attention needs to be paid to its grain patterns, texture and colour. (3:27) In rooms where relaxation or deep thought is the aim, say bedrooms or the study, dark, strong-grained woods are the rule. (3:36) Here, the grain ought to match the furniture for a feeling of homogeneity.
(3:40) In rooms where activity and motion are typical, the dining room or living room, lighter, finer-grained lumber is more suitable. (3:48) In such a setting, the wood grain might be useful in offering a contrast to the furniture. (3:53) This leads to a feel of subconscious excitement in keeping with the room's function.
(3:58) In either case, though, consult a decorator. (4:01) It is a decorator's job to know what materials to use to fit the function of the room. (4:06) Though some things about putting together a room are subjective and based on one's individual taste, (4:11) materials appropriate to a room's function are much more straightforward.
(4:16) A decorator takes the needs of the customer and uses a mathematical formula rather than subjective words. (4:22) Since feelings vary from person to person, verbal descriptions of wood types tend to be ambiguous. (4:29) You want the wood you select, not something approximate.
(4:33) And if you do decide to do it yourself, remember that all wood must be treated with preservatives to enhance its appearance and preserve its natural beauty. (4:47) In the case of stone or quarry tile, as flat-cut flooring stone is properly called, a new set of considerations must be weighed up. (4:54) Simple colour aside, the degree of reflection must be kept in mind.
(4:59) This is called the reflectance rate, which is expressed in a number between 0.0 and 1.0, depending on the amount of light it reflects. (5:07) At one end of the scale is polished silver. (5:10) At a rating of 1.0, this shiny surface reflects nearly all of the light directed at it.
(5:15) Numbers closer to zero describe materials that absorb more light. (5:20) Moving down the scale a bit, we see that plastic that has been painted white has a rate of 0.8, which makes sense. (5:27) We know that the colour white reflects all other colour, while black absorbs all colour, and plastic itself is a relatively reflective material.
(5:36) Materials that are denser and darker have reflectance rates much closer to zero. (5:41) The quarry tile I mentioned a while ago has a rate of 0.1. (5:44) As you may know, quarry tile is generally dark brown and made from clay, so it is quite dense. (5:50) Of course, there is considerable variation among types of quarry tile because of the hue or treatment of the clay during its creation.
(5:59) Does anyone have any guesses as to what material may have a rate of almost 0.0? (6:04) We can guess most of these materials are black in colour, but plastic, wood and even stone reflect some light. (6:10) One material with a rate of almost 0.0 is black velvet. The texture produces almost no shine at all.
(6:20) Carrara marble, despite its white hue, is actually lower in reflectivity than black onyx. (6:26) In any case, the fact that tiles vary somewhat should not be forgotten. (6:30) A highly reflective floor would not be suitable in a library.
(6:34) It would be indispensable in a ballroom, should your home be large enough to feature one. (6:37) Again, a rule of thumb is that light means lively. (6:42) Since form and material follow function, one should only use the more reflective materials in rooms where the cultivation and expression of energy is important.
(6:51) Bear in mind, too, that most types of stone cost more than all but the rarest of wood. (6:56) Of course, there is no reason why some rooms of a house should not feature wood floors or other stone tiles. (7:03) You can even mix the two.
(7:04) A room with wood panels on the walls can have a beautiful stone floor. (7:09) My bedroom has white birch walls and a light blue slate floor. (7:13) The place looks like a Russian hunting lodge.
(7:17) Remember, though, go with what feels right for you. (7:20) Good taste and the laws of interior design are the homeowner's servants, not his master. (7:25) It's only beautiful when you decide it is.
(7:28) I mean, you're the one who lives there, not the decorator, right? (7:31) OK, are there any questions? (7:38) That is the end of section four. (7:40) You now have half a minute to check your answers.

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