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FENSA - Ventilation Part F

Notes from FENSA

If the window is re-designed (not exactly the same number and type of openers), ventilation could be made worse, therefore you must check you meet the following requirements for purge ventilation:

  • For hinged or pivot window that opens 30 degrees or more, or for sliding sash windows, the area of the opening sash should be at least 1/20th of the floor area of the room.
  • For a hinged or pivot that opens less than 30 degrees, the area of the opening sash should be at least 1/10th of the floor area of the room.

Background Ventilation

Trickle Ventilators:

The guidance has not changed since 2006: the following applies:

  • If trickle ventilators are fitted in the window that is being replaced then a trickle ventilator must be fitted to the new window or a appropriately sized air brick fitted. (Two stage locking handles are not acceptable as a alternative to trickle ventilators).
  • If no trickle ventilators are fitted and two-stage lacking handles are fitted in the windows being removed then either;
    1. Trickle vents can be fitted as an alternative, or
    2. Two-stage locking handles can be fitted or
    3. Appropriate air-bricks can be fitted
  • If no ventilation is provided in the windows being removed then a number of options are available to the consumer. Consideration should be given to the fitting of:
    1. Trickle vents, or
    2. Two-stage locking handles,
    3. Air bricks.
  • Matters should not be made worse and therefore the customer can in these circumstances opt not to fit ventilators as set out above.

Fensa - Safety Glazing

Advice

Why Check?

  • You need to be sure that your home is a Safe Environment
  • It is a legal requirement to install safety glazing in Critical Locations. Checking could save lives.
  • Approved Document N (Glazing – Protection against impact) of the Building Regulations in England and Wales provides guidance for safety glazing.
  • BS 6262-4:2005 provides details of safety glazing requirements.

What you need to do

  • Identify areas in your home that are considered to be ‘critical locations’ (see figure 1)
  • You must then check that these critical locations have safety glazing material installed.
  • If safety glazing material has been installed, there will be visible markings you can check.

All safety glazing must be visibly marked on the glass. If the ‘visible markings’ on the safety glazing material is not clear or you have any concerns about whether the safety glazing has been installed to the correct standard, you should go back to the original window installer and seek advice. If you are not happy with their response, you should contact FENSA www.fensa.org.uk

Safety Glazing is:

  • A Glass or glazing product which conforms to the relevant European glazing standard e.g. EN 12150 or EN 14449 or EN 14179.
  • The glass has also been tested against the European standard for EN 12600 for safety impact. This means that on impact the glass does not break or breaks in a way unlikely to cause serious injury.

Identifying 'Critical Locations in your home

The shaded areas (see Figure 1) are critical locations which require the use of safety glass. These are:

Those areas of internal and external walls that are considered ‘critical locations’ in terms of safety are:

  1. (a) Between the finished floor level and 1500mm above that level in doors and in side panels which are within 300 mm of either edge of the door.
  2. (b) Between the finished floor level and 800mm above that level in the case of windows not included in note (a) above.
  3. (c) Glazing in Bathing Areas: Any glazing forming part of a bath or shower screen, or located adjacent to, or surrounding, a bath, swimming pool, or other associated wet areas, constitutes s potential danger because of the possibility of a person slipping on a wet surface, In these cases, all glazing should be Safety Glazing conforming to BS 6262-4 : 2005.

A window within 800mm of the bottom of a bath or shower should be safety glass.

FENSA

Conservation of fuel and power in existing dwellings' (L1B)

Notes from FENSA

All Replacement Windows Shall Achieve:

  • Whole window U-value of at least 1.6 (W/m²K),
  • Window energy rating of band C or better.
  • Note: No longer can you generally comply with IGU’s with a centre pane U-value of 1.2 (W/m²K). Special circumstances apply – more guidance to be provided by FENSA.

All Replacement Doors

  • Where a glazed panel within a door is equal to or greater than 50% of the entire door area (including the immediate frame but not adjacent glazed panels)
  • Doors within the scope of AD L shall have a U-value not exceeding 1.8 (W/m²K).
  • All other doors require a U-value not exceeding 1.8 (W/m²K).

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“The results were so good, I had to re-balance my heating!”

Clearview just changed all the windows in my bungalow in less than a day. The results were so good, I had to re-balance my heating, which had been set up to cope with the previous window installation. Two very industrious workers did a superb job, they are highly recommended. Clearview is excellent, you won’t regret giving them the chance to please you with their efforts.

Andy
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