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Audiodor 32 and 32/60 Rated 'Severe Duty' FD30 & FD60 fire resistance Double leaf arrangement tested Latched or unlatched Frames - minimum 32mm Barum or optional Cubith Frame materials - softwood, hardwood or MDF, hardwood only for 32/60 Threshold arrangement - A & C Audiodor 35/60 FD60 fire resistance Latched or unlatched Frames - minimum 32mm Barum or optional Cubith Frame materials - hardwood Threshold arrangement - A & C Audiodor 38 Lightweight with high acoustic performance Latched or unlatched Double leaf arrangement - tested: 38 RwdB with astragals, 35 RwdB without FD30 fire resistance Frames - minimum 32mm Barum or optional Cubith Frame materials - softwood or hardwood Threshold arrangement - A

Audiodor 39/60 Lead-lined door leaf, rated 'Severe Duty' Latched or unlatched FD60 fire resistance Frames - minimum 44mm Barum Frame materials - hardwood Threshold arrangement - A Audiodor 40 Lightweight with high acoustic performance Latched or unlatched FD30 fire resistance Frames - minimum 32mm Barum or optional Cubith Frame materials - softwood or hardwood Threshold arrangement - B Audiodor 44 Very high acoustic performance FD30 fire resistance Latched only Frames - minimum 44mm Barum Frame materials - hardwood Threshold arrangement - B Audiodor Super Exceptionally high acoustic performance FD30 fire resistance Latched only Frames - minimum 44mm Barum Frame materials - hardwood Threshold arrangement - B

Achieving performance on-site

Some acoustic doors may be heavy and require appropriate wall structures to support them. Guidance for handling and installation should be sought from our Technical Services Department.

Doorsets are supplied with all the necessary seals fitted to either door or frame, sometimes including astragals for pairs. With acoustic doors the gap between door and threshold on the floor must also be sealed with contact seals or wiping seals, depending on performance requirements and floor finish. Thresholds are needed and these must be level with the door. They can be bedded on mastic and screw-fixed direct to hard surfaces while carpet and textured flooring should stop either side. Low profile aluminium thresholds may be fixed on a hardwood packer so that top of threshold is 5mm above floor finish.

Gaps between back of frame and wall must be fully packed with mineral wool, leaving only enough space for mastic pointing where no architrave is used. Special care is needed to check that doors close correctly all around, noting a slight resistance when the door closes against its seals.

• A level floor is essential to threshold sealing
• Seal under the threshold and bottom of jambs, as well as back of frame
• Plumb square and level to ensure that seals contact fully all around
• Seals must not be cut for ironmongery
• Never paint seals or close a freshly painted door onto them
• Avoid damaging all seals, particularly on the bottom edge