Mercuri (Architectural Sales) Ltd.

(Additional Important Information and Guidelines)

Please note that this addendum notice forms an important part of our current Terms and Conditions

and should be read in conjuction with that document, which can also be viewed on this website.

            1.    Builder’s Kerb and Support Structures.  At our discretion, but a good nine times out of ten and for all custom designed products, we provide our clients with project specific detailed drawings.

                   Because of this, Mercuri Architectural work on the principle that it is the customer (and/or their specifying consultants and main contractors) who has the full responsibility for providing any required

                   support structure not specifically included in our quotation, to the dimensions, angles and quality (within accepted industry tolerances) required for our products to be safely and correctly installed.

                   Once one of our drawings for approval has been issued and it has been returned as approved, if it is subsequently discovered that the supporting structure provided is unsuitable, either in terms of

                   size, pitch or quality, then please note that we will reserve the right to amend our installation date and price as required, including any additional subsistence and travel costs involved and in addition,

                   nor will we accept any other financial loss we incur as a result of our products not fitting or being able to be installed.


            2.    Cleaning. (Polycarbonate)  Polycarbonate panels are delivered to site protected by a thin protective film sheet, which must be removed prior to installation. Thermoplastics are initially

                   prone to static once this protection layer has been removed and this can attract dust. The initial and all subsequent cleaning should be as follows:-


                   ●  Remove any twigs or other large particles of debris that could impair the rooflight's functions


                   ●  Using just a sponge or a soft cloth, gently wash the rooflight using just lukewarm, soapy water (nothing stronger than mild household liquid detergent is required)


                   ●   Rinse with lukewarm clean water


                   ●   If still required, repeat the above


                   On no account ever attempt to clean polycarbonate using scrubbing brushes, abrasive materials or any scraping tool, or by using any strong alkali cleaners or abrasive liquid cleaners.

                   In addition never be tempted to apply any chemicals such as acetone, any hydrocarbons (for example petrol) or any solvents for instance Isoproponal, commonly found in nail varnish remover.


                   Cleaning. (Glass)  Once all the building works have been completed a glass rooflight should require nothing more than a wash down with clean, warm water, to remove any inevitable

                   building site dust. To keep the glazing/rooflight looking its best and functioning correctly, this procedure should be repeated at regular intervals or as required.


                   (Self cleaning glass)  Due to it’s special soft coating, it is probably best just to give this type of glazing an occasional dousing with a hosepipe, but only after there has been a period of

                   long dry weather. Otherwise, we suggest you simply let the usual U.K. climate get to work. In extreme cases, you may wish to use some mild soapy water and a soft cloth. but that’s it.

                   Never attempt to clean this special glass with anything else as this will damage the special coating which gives the glass its self cleaning ability.


             3.    Concrete Pads.  When appropriate to the design, our canopy quotations include for standard concrete pads, dug out to 500mm deep, prior to making good and reinstating to ground level with

                   concrete. They do not include any provision to undertake any additional work, for example, alterations required due to underground services. Where underground services are discovered,

                   it shall be the client and/or main contractor’s responsibility to have the necessary underground services amended as required.


             4.   Concrete Tolerances.  Column supported WeatherShield canopies are designed and manufactured to accommodate a maximum variance of 20mm between the finished surfaces of the

                   footings/foundations. It is therefore very important to ensure that the finished top surfaces of all concrete bases do not exceed 20mm, otherwise we reserve the right to amend our final invoice to

                   include but not limited to additional site time and materials and travelling and subsistence costs.


             5.   Condensation.  Because the forming of condensation is dependant on various natural environmental conditions being present including relative humidity, internal and external temperatures

                   and natural or man-made ventilation and air movement (much of which will always be beyond our control), it follows that unfortunately, no guarantee can be given that at some point, condensation

                   will not form on your new rooflight or glazed structure. Condensation is most prone to form when colder surfaces meets warm humid air, so it can often be at its worst during the winter

                   months but also when a larger building, e.g. a school is still in the process of or has just been built and has therefore, not had chance to properly ‘dry out’ from all the onsite moisture

                   habitually generated during the normal construction process. Unless it is not possible to improve humidity levels by  actively removing air moisture or introducing sufficient ventilation, then

                   there remains a good chance that condensation will form. However, we will always try to guide our clients as to the better materials to choose and the ones that it is best to try to avoid, for

                   example single pane glazing and large metal surface areas e.g. upstands (even G.R.P.).


              6.   Electrical Work.  Whilst we are pleased to quote our clients for electrically operated ventilation systems, we do not undertake any of the electrical installation work. We do however provide,

                    on request, technical information about the control boxes, actuators etc. which we supply.


              7.   Goods Protection.  If our contract includes installation, protection of the completed work (for any subsequent site work by others) is not included.


              8.   Handling.  According to the latest guidelines for the safe handling of goods, 25kgs per man or 16kgs per woman are the maximum weights to be lifted by one person. Please refer to the appropriate

                    technical pages and sections to determine the approximate weight of your goods.


                    As a further guideline, a 1000mm x 1000mm triple glazed, polycarbonate dome weighs approximately 10.8 kgs (plus packaging) whilst a 1000mm x 1000mm double glazed glass rooflight typically

                    weighs c.30 kgs (plus packaging), meaning that at least two people would be required to take delivery. In addition, depending on the total quantities and the style of rooflight or architectural

                    glazing involved, deliveries are frequently made on wooden pallets, which either have to be quickly but safely unloaded, prior to the delivered goods being carefully moved to a secure storage

                    area or alternatively, the entire loaded pallet/s being safely transported to a place of safety.


                    Therefore, unless they will already be on site as a matter of course, we strongly advise that a sufficient sum is built into the project budget to cover the costs of the temporary hire of appropriate

                    lifting equipment and / or labourers, to enable your goods to be safely offloaded, securely stored and subsequently hoisted / transported / carried to the actual installation location.


              9.   Lead Times.  Because lead times can vary throughout the year and also be affected by specification criteria such as choice of glazing, we always include the most up to date lead time

                   information in all our quotations.


             10.  Leadwork.  Mercuri Architectural quotations do not include for leadwork as our installation teams are not qualified to do this work. It is our belief that during the removal of old glazed

                   structures, the existing leadwork often gets badly damaged and we therefore recommend that a skilled lead worker is engaged to correctly replace this prior to the new glazing being installed

                   and also to suitably adjust it after the new glazing has been fitted.          


             11.  Load Calculations.  In addition to the general load information we supply, to assist your structural engineer or similar in the kerb design, Mercuri Architectural can provide, at our discretion,

                   project specific load calculations. However, please allow an additional 2-3 weeks for these to be issued. In all instances, it remains the complete responsibility of others to ensure that any

                   builder’s kerb that is constructed, is capable of withstanding all dead or live loads that the glazed structure or rooflight may impose during its normal functional use.


             12.  Non Fragile.  If there is a requirement for non fragile or walk on glazing, it must be clearly notified to Mercuri Architectural prior to the quotation being issued, as later introduction could well

                   have cost implications.


             13.  Refurbishment/Replacement Contracts.  Unless specifically included in our quotation, we do not remove existing structures or repair or adapt existing builder’s kerbs, although with

                   regard to a builder's kerb, we can offer advice on how it can be altered so that the new rooflight can be properly installed.


             14.  Roof Protection.  Prior to any installation work commencing, suitable protection (to avoid accidental damage to the roof) must be provided by others, to both the area adjacent to and any

                   areas needed for, access to the installation site. This is particularly important for standing seam, metal roofs.


             15.  Site Surveys.  Mercuri Architectural undertake, at their discretion, pre-installation site surveys. Therefore, the vast majority of our quotations will include for a surveyor or installation engineer

                   to visit site to check, amongst other things, that the builder’s kerb/support structure has been correctly constructed and that there are no access or site issues which could create a problem when the 

                   glazed structure/rooflight is delivered and installed.


             16.  Warranties.  The Mercuri Architectural range of rooflights and other architectural glazing products incorporates a broad range of different glazing and other materials, all of which are supplied by

                   their manufacturers with different warranties and technical clauses. Because we believe that it is not the best solution for our clients and potential customers, we have now decided to stop

                   publishing just one single general warranty and instead to include project specific warranty details in our quotations.